Protein phosphorylation

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Model of a phosphorylated serine residue Phosphorylated serine.png
Model of a phosphorylated serine residue
Serine in an amino acid chain, before and after phosphorylation. Phosporylation of a serine residue, before and after shot.png
Serine in an amino acid chain, before and after phosphorylation.

Protein phosphorylation is a reversible post-translational modification of proteins in which an amino acid residue is phosphorylated by a protein kinase by the addition of a covalently bound phosphate group. Phosphorylation alters the structural conformation of a protein, causing it to become activated, deactivated, or otherwise modifying its function. [1] Approximately 13,000 human proteins have sites that are phosphorylated. [2]

Contents

The reverse reaction of phosphorylation is called dephosphorylation, and is catalyzed by protein phosphatases. Protein kinases and phosphatases work independently and in a balance to regulate the function of proteins. [3]

The amino acids most commonly phosphorylated are serine, threonine, tyrosine, and histidine. [4] [5] These phosphorylations play important and well-characterized roles in signaling pathways and metabolism. However, other amino acids can also be phosphorylated post-translationally, including arginine, lysine, aspartic acid, glutamic acid and cysteine, and these phosphorylated amino acids have been identified to be present in human cell extracts and fixed human cells using a combination of antibody-based analysis (for pHis) and mass spectrometry (for all other amino acids). [5] [6] [7] [8]

Protein phosphorylation was first reported in 1906 by Phoebus Levene at the Rockefeller Institute for Medical Research with the discovery of phosphorylated vitellin. [9] However, it was nearly 50 years until the enzymatic phosphorylation of proteins by protein kinases was discovered. [10]

History

In 1906, Phoebus Levene at the Rockefeller Institute for Medical Research identified phosphate in the protein vitellin (phosvitin) [9] and by 1933 had detected phosphoserine in casein, with Fritz Lipmann. [11] However, it took another 20 years before Eugene P. Kennedy described the first "enzymatic phosphorylation of proteins". [10] The first phosphorylase enzyme was discovered by Carl and Gerty Cori in the late 1930s. Carl and Gerty Cori found two forms of glycogen phosphorylase which they named A and B but did not correctly understand the mechanism of the B form to A form conversion. The interconversion of phosphorylase b to phosphorylase a was later described by Edmond Fischer and Edwin Krebs, as well as, Wosilait and Sutherland, involving a phosphorylation/dephosphorylation mechanism. [12] It was found that an enzyme, named phosphorylase kinase and Mg-ATP were required to phosphorylate glycogen phosphorylase by assisting in the transfer of the γ-phosphoryl group of ATP to a serine residue on phosphorylase b. Protein phosphatase 1 is able to catalyze the dephosphorylation of phosphorylated enzymes by removing the phosphate group. Earl Sutherland explained in 1950, that the activity of phosphorylase was increased and thus glycogenolysis stimulated when liver slices were incubated with adrenalin and glucagon. Phosphorylation was considered a specific control mechanism for one metabolic pathway until the 1970s, when Lester Reed discovered that mitochondrial pyruvate dehydrogenase complex was inactivated by phosphorylation. Also in the 1970s, the term multisite phosphorylation was coined in response to the discovery of proteins that are phosphorylated on two or more residues by two or more kinases. In 1975, it was shown that cAMP-dependent proteins kinases phosphorylate serine residues on specific amino acid sequence motifs. Ray Erikson discovered that v-Src was a kinase and Tony Hunter found that v-Src phosphorylated tyrosine residues on proteins in the 1970s. [13] In the early 1980, the amino-acid sequence of the first protein kinase was determined which helped geneticists understand the functions of regulatory genes. In the late 1980s and early 1990s, the first protein tyrosine phosphatase (PTP1B) was purified and the discovery, as well as, cloning of JAK kinases was accomplished which led to many in the scientific community to name the 1990s as the decade of protein kinase cascades. [14] [15] Edmond Fischer and Edwin Krebs were awarded the Nobel prize in 1992 "for their discoveries concerning reversible protein phosphorylation as a biological regulatory mechanism". [16]

Abundance

Reversible phosphorylation of proteins is abundant in both prokaryotic and even more so in eukaryotic organisms. [17] [18] [19] [20] For instance, in bacteria 5-10% of all proteins are thought to be phosphorylated. [21] [22] By contrast, it is estimated that one third of all human proteins is phosphorylated at any point in time, with 230,000, 156,000, and 40,000 unique phosphorylation sites existing in human, mouse, and yeast, respectively. [2] In yeast, about 120 kinases (out of ~6,000 proteins total) cause 8,814 known regulated phosphorylation events, generating about 3,600 phosphoproteins (about 60% of all yeast proteins). [23] [24] Hence, phosphorylation is a universal regulatory mechanism that affects a large portion of proteins. Even if a protein is not phosphorylated itself, its interactions with other proteins may be regulated by phosphorylation of these interacting proteins.

Mechanisms and functions of phosphorylation

Phosphorylation introduces a charged and hydrophilic group in the side chain of amino acids, possibly changing a protein's structure by altering interactions with nearby amino acids. Some proteins such as p53 contain multiple phosphorylation sites, facilitating complex, multi-level regulation. Because of the ease with which proteins can be phosphorylated and dephosphorylated, this type of modification is a flexible mechanism for cells to respond to external signals and environmental conditions. [25]

Kinases phosphorylate proteins and phosphatases dephosphorylate proteins. Many enzymes and receptors are switched "on" or "off" by phosphorylation and dephosphorylation. Reversible phosphorylation results in a conformational change in the structure in many enzymes and receptors, causing them to become activated or deactivated. Phosphorylation usually occurs on serine, threonine, tyrosine and histidine residues in eukaryotic proteins. Histidine phosphorylation of eukaryotic proteins appears to be much more frequent than tyrosine phosphorylation. [26] In prokaryotic proteins phosphorylation occurs on the serine, threonine, tyrosine, histidine, arginine or lysine residues. [17] [18] [26] [27] The addition of a phosphate (PO43-) molecule to a non-polar R group of an amino acid residue can turn a hydrophobic portion of a protein into a polar and extremely hydrophilic portion of a molecule. In this way protein dynamics can induce a conformational change in the structure of the protein via long-range allostery with other hydrophobic and hydrophilic residues in the protein.

One such example of the regulatory role that phosphorylation plays is the p53 tumor suppressor protein. The p53 protein is heavily regulated [28] and contains more than 18 different phosphorylation sites. Activation of p53 can lead to cell cycle arrest, which can be reversed under some circumstances, or apoptotic cell death. [29] This activity occurs only in situations wherein the cell is damaged or physiology is disturbed in normal healthy individuals.

Upon the deactivating signal, the protein becomes dephosphorylated again and stops working. [30] [ citation needed ] This is the mechanism in many forms of signal transduction, for example the way in which incoming light is processed in the light-sensitive cells of the retina.

Regulatory roles of phosphorylation include:

Membrane transport

Protein degradation

Enzyme regulation (activation and inhibition)

Protein-protein interactions

Signaling networks

Elucidating complex signaling pathway phosphorylation events can be difficult. In cellular signaling pathways, protein A phosphorylates protein B, and B phosphorylates C. However, in another signaling pathway, protein D phosphorylates A, or phosphorylates protein C. Global approaches such as phosphoproteomics, the study of phosphorylated proteins, which is a sub-branch of proteomics, combined with mass spectrometry-based proteomics, have been utilised to identify and quantify dynamic changes in phosphorylated proteins over time. These techniques are becoming increasingly important for the systematic analysis of complex phosphorylation networks. [39] They have been successfully used to identify dynamic changes in the phosphorylation status of more than 6,000 sites after stimulation with epidermal growth factor. [40] Another approach for understanding Phosphorylation Network, is by measuring the genetic interactions between multiple phosphorylating proteins and their targets. This reveals interesting recurring patterns of interactions – network motifs. [41] Computational methods have been developed to model phosphorylation networks [42] [43] and predict their responses under different perturbations. [44]

Phosphorylation of histones

Eukaryotic DNA is organized with histone proteins in specific complexes called chromatin. The chromatin structure functions and facilitates the packaging, organization and distribution of eukaryotic DNA. However, it has a negative impact on several fundamental biological processes such as transcription, replication and DNA repair by restricting the accessibility of certain enzymes and proteins. Post-translational modification of histones such as histone phosphorylation has been shown to modify the chromatin structure by changing protein:DNA or protein:protein interactions. [45] Histone post-translational modifications modify the chromatin structure. The most commonly associated histone phosphorylation occurs during cellular responses to DNA damage, when phosphorylated histone H2A separates large chromatin domains around the site of DNA breakage. [46] Researchers investigated whether modifications of histones directly impact RNA polymerase II directed transcription. Researchers choose proteins that are known to modify histones to test their effects on transcription, and found that the stress-induced kinase, MSK1, inhibits RNA synthesis. Inhibition of transcription by MSK1 was most sensitive when the template was in chromatin, since DNA templates not in chromatin were resistant to the effects of MSK1. It was shown that MSK1 phosphorylated histone H2A on serine 1, and mutation of serine 1 to alanine blocked the inhibition of transcription by MSK1. Thus results suggested that the acetylation of histones can stimulate transcription by suppressing an inhibitory phosphorylation by a kinase as MSK1. [47]

Kinases

Within a protein, phosphorylation can occur on several amino acids. Phosphorylation on serine is thought to be the most common, followed by threonine. Tyrosine phosphorylation is relatively rare but lies at the head of many protein phosphorylation signalling pathways (e.g. in tyrosine kinase-linked receptors) in most of the eukaryotes. Phosphorylation on amino acids, such as serine, threonine, and tyrosine results in the formation of a phosphoprotein, when the phosphate group of the phosphoprotein reacts with the -OH group of a Ser, Thr, or Tyr sidechain in an esterification reaction. [48] However, since tyrosine phosphorylated proteins are relatively easy to purify using antibodies, tyrosine phosphorylation sites are relatively well understood. Histidine and aspartate phosphorylation occurs in prokaryotes as part of two-component signaling and in some cases in eukaryotes in some signal transduction pathways. The analysis of phosphorylated histidine using standard biochemical and mass spectrometric approaches is much more challenging than that of Ser, Thr or Tyr. [49] [7] [5] and [50] In prokaryotes, archaea, and some lower eukaryotes, histidine's nitrogen act as a nucleophile and binds to a phosphate group. [51] Once histidine is phosphorylated the regulatory domain of the response regulator catalyzes the transfer of the phosphate to aspartate.

Receptor tyrosine kinases

The AXL receptor tyrosine kinase, showing the symmetry of the dimerized receptors Protein AXL PDB 2c5d.png
The AXL receptor tyrosine kinase, showing the symmetry of the dimerized receptors

While tyrosine phosphorylation is found in relatively low abundance, it is well studied due to the ease of purification of phosphotyrosine using antibodies. Receptor tyrosine kinases are an important family of cell surface receptors involved in the transduction of extracellular signals such as hormones, growth factors, and cytokines. Binding of a ligand to a monomeric receptor tyrosine kinase stabilizes interactions between two monomers to form a dimer, after which the two bound receptors phosphorylate tyrosine residues in trans. Phosphorylation and activation of the receptor activates a signaling pathway through enzymatic activity and interactions with adaptor proteins. [52] Signaling through the epidermal growth factor receptor (EGFR), a receptor tyrosine kinase, is critical for the development of multiple organ systems including the skin, lung, heart, and brain. Excessive signaling through the EGFR pathway is found in many human cancers. [53]

Cyclin-dependent kinases

Cyclin-dependent kinases (CDKs) are serine-threonine kinases which regulate progression through the eukaryotic cell cycle. CDKs are catalytically active only when bound to a regulatory cyclin. Animal cells contain at least nine distinct CDKs which bind to various cyclins with considerable specificity. CDK inhibitors (CKIs) block kinase activity in the cyclin-CDK complex to halt the cell cycle in G1 or in response to environmental signals or DNA damage. The activity of different CDKs activate cell signaling pathways and transcription factors that regulate key events in mitosis such as the G1/S phase transition. Earlier cyclin-CDK complexes provide the signal to activate subsequent cyclin-CDK complexes. [54]

Sites

There are thousands of distinct phosphorylation sites in a given cell since:

  1. There are thousands of proteins in any particular cell.
  2. An estimated 1/10 to 1/2 of proteins are phosphorylated in some cellular state.
  3. 30–65% of proteins in humans and ~50% of proteins in yeast may be phosphorylated. [15] [2]
  4. An estimated 230,000, 156,000, and 40,000 phosphorylation sites exist in human, mouse, and yeast, respectively. [2]
  5. Phosphorylation often occurs on multiple distinct sites on a given protein.

Since phosphorylation of any site on a given protein can change the function or localization of that protein, understanding the "state" of a cell requires knowing the phosphorylation state of its proteins. For example, generally, if amino acid Serine-473 in the protein AKT is phosphorylated, AKT is functionally active as a kinase, and if it is not phosphorylated, AKT is an inactive kinase.

Phosphorylation sites are crucial for proteins and their transportation and functions. They are the covalent modification of proteins through reversible phosphorylation. This enables proteins to stay inbound within a cell since the negative phosphorylated site disallows their permeability through the cellular membrane. Protein dephosphorylation allows the cell to replenish phosphates through release of pyrophosphates which saves ATP use in the cell. [55] An example of phosphorylating enzyme is found in E. coli bacteria. It possesses alkaline phosphatase in its periplasmic region of its membrane. The outermost membrane is permeable to phosphorylated molecules however the inner cytoplasmic membrane is impermeable due to large negative charges. [56] In this way, the E. coli bacteria stores proteins and pyrophosphates in its periplasmic membrane until either are needed within the cell.

Recent advancement in phosphoproteomic identification has resulted in the discoveries of countless phosphorylation sites in proteins. This required an integrative medium for accessible data in which known phosphorylation sites of proteins are organized. A curated database of dbPAF was created, containing known phosphorylation sites in H. sapiens , M. musculus, R. norvegicus, D. melanogaster, C. elegans, S. pombe and S. cerevisiae. The database currently holds 294,370 non-redundant phosphorylation sites of 40,432 proteins. [57] Other tools of phosphorylation prediction in proteins include NetPhos [58] for eukaryotes, NetPhosBac [58] for bacteria, and ViralPhos [59] for viruses.

Serine and threonine

There are a large variety of serine residues, and the phosphorylation of each residue can lead to different metabolic consequences.

Phosphorylation of serine and threonine residues is known to crosstalk with O-GlcNAc modification of serine and threonine residues.

Tyrosine

Tyrosine phosphorylation is a fast, reversible reaction, and one of the major regulatory mechanisms in signal transduction. Cell growth, differentiation, migration, and metabolic homeostasis are cellular processes maintained by tyrosine phosphorylation. The function of protein tyrosine kinases and protein-tyrosine phosphatase counterbalances the level of phosphotyrosine on any protein. The malfunctioning of specific chains of protein tyrosine kinases and protein tyrosine phosphatase has been linked to multiple human diseases such as obesity, insulin resistance, and type 2 diabetes mellitus. [64] Phosphorylation on tyrosine occurs in eukaryotes, select bacterial species, and is present among prokaryotes. Phosphorylation on tyrosine maintains the cellular regulation in bacteria similar to its function in eukaryotes. [65]

Arginine

Arginine phosphorylation in many Gram-positive bacteria marks proteins for degradation by a Clp protease. [34]

Non-canonical phosphorylation on His, Asp, Cys, Glu, Arg and Lys in human cells

Widespread human protein phosphorylation occurs on multiple non-canonical amino acids, including motifs containing phosphorylated histidine (1 and 3 positions), aspartate, cysteine, glutamate, arginine, and lysine in HeLa cell extracts. Due to the chemical and thermal lability of these phosphorylated residues, special procedures and separation techniques are required for preservation alongside the heat stable 'classical' Ser, Thr and Tyr phosphorylation. [66]

Detection and characterization

Antibodies can be used as powerful tool to detect whether a protein is phosphorylated at a particular site. Antibodies bind to and detect phosphorylation-induced conformational changes in the protein. Such antibodies are called phospho-specific antibodies; hundreds of such antibodies are now available. They are becoming critical reagents both for basic research and for clinical diagnosis.

Example of posttranslational modification detected on a 2D gel (spot boundaries delimited by analysis software, identification by mass spectrometry, P46462 is the protein ID in Expasy) PTM-phosphorylation-example-jepoirrier.jpg
Example of posttranslational modification detected on a 2D gel (spot boundaries delimited by analysis software, identification by mass spectrometry, P46462 is the protein ID in Expasy)

Post-translational modification (PTM) isoforms are easily detected on 2D gels. Indeed, phosphorylation replaces neutral hydroxyl groups on serines, threonines, or tyrosines with negatively charged phosphates with pKs near 1.2 and 6.5. Thus, below pH 5.5, phosphates add a single negative charge; near pH 6.5, they add 1.5 negative charges; above pH 7.5, they add 2 negative charges. The relative amount of each isoform can also easily and rapidly be determined from staining intensity on 2D gels.

In some very specific cases, the detection of the phosphorylation as a shift in the protein's electrophoretic mobility is possible on simple 1-dimensional SDS-PAGE gels, as it is described for instance for a transcriptional coactivator by Kovacs et al. [67] Strong phosphorylation-related conformational changes (that persist in detergent-containing solutions) are thought to underlie this phenomenon. Most of the phosphorylation sites for which such a mobility shift has been described fall in the category of SP and TP sites (i.e. a proline residue follows the phosphorylated serine or threonine residue).

Large-scale mass spectrometry analyses have been used to determine sites of protein phosphorylation. Dozens of studies have been published, each identifying thousands of sites, many of which were previously undescribed. [68] [69] Mass spectrometry is ideally suited for such analyses using HCD or ETD fragmentation, as the addition of phosphorylation results in an increase in the mass of the protein and the phosphorylated residue. Advanced, highly accurate mass spectrometers are needed for these studies, limiting the technology to labs with high-end mass spectrometers. However, the analysis of phosphorylated peptides by mass spectrometry is still not as straightforward as for "regular", unmodified peptides. EThcD has been developed combining electron-transfer and higher-energy collision dissociation. Compared to the usual fragmentation methods, EThcD scheme provides more informative MS/MS spectra for unambiguous phosphosite localization. [70]

A detailed characterization of the sites of phosphorylation is very difficult, and the quantitation of protein phosphorylation by mass spectrometry requires isotopic internal standard approaches. [71] A relative quantitation can be obtained with a variety of differential isotope labeling technologies. [72] There are also several quantitative protein phosphorylation methods, including fluorescence immunoassays, microscale thermophoresis, FRET, TRF, fluorescence polarization, fluorescence-quenching, mobility shift, bead-based detection, and cell-based formats. [73] [74]

Evolution

Protein phosphorylation is common among all clades of life, including all animals, plants, fungi, bacteria, and archaea. The origins of protein phosphorylation mechanisms are ancestral and have diverged greatly between different species. In eukaryotes, it is estimated that between 30 – 65% of all proteins may be phosphorylated, with tens or even hundreds of thousands of distinct phosphorylation sites. [75] [2] Some phosphorylation sites appear to have evolved as conditional "off" switches, blocking the active site of an enzyme, such as in the prokaryotic metabolic enzyme isocitrate dehydrogenase. However, in the case of proteins that must be phosphorylated to be active, it is less clear how they could have emerged from non-phosphorylated ancestors. It has been shown that a subset of serine phosphosites are often replaced by acidic residues such as aspartate and glutamate between different species. These anionic residues can interact with cationic residues such as lysine and arginine to form salt bridges, stable non-covalent interactions that alter a protein's structure. These phosphosites often participate in salt bridges, suggesting that some phosphorylation sites evolved as conditional "on" switches for salt bridges, allowing these proteins to adopt an active conformation only in response to a specific signal. [76]

There are around 600 known eukaryotic protein kinases, making them one of the largest eukaryotic gene families. Most phosphorylation is carried out by a single superfamily of protein kinases that share a conserved kinase domain. Protein phosphorylation is highly conserved in pathways central to cell survival, such as cell cycle progression relying on cyclin-dependent kinases (CDKs), but individual phosphorylation sites are often flexible. Targets of CDK phosphorylation often have phosphosites in disordered segments, which are found in non-identical locations even in close species. Conversely, targets of CDK phosphorylation in structurally defined regions are more highly conserved. While CDK activity is critical for cell growth and survival in all eukaryotes, only very few phosphosites show strong conservation of their precise positions. Positioning is likely to be highly important for phosphates that allosterically regulate protein structure, but much more flexible for phosphates that interact with phosphopeptide-binding domains to recruit regulatory proteins. [77]

Comparisons between eukaryotes and prokaryotes

Protein phosphorylation is a reversible post-translational modification of proteins. In eukaryotes, protein phosphorylation functions in cell signaling, gene expression, and differentiation. It is also involved in DNA replication during the cell cycle, and the mechanisms that cope with stress-induced replication blocks. Compared to eukaryotes, prokaryotes use Hanks-type kinases and phosphatases for signal transduction. Whether or not the phosphorylation of proteins in bacteria can also regulate processes like DNA repair or replication still remains unclear. [78]

Compared to the protein phosphorylation of prokaryotes, studies of protein phosphorylation in eukaryotes from yeast to human cells have been rather extensive. It is known that eukaryotes rely on the phosphorylation of the hydroxyl group on the side chains of serine, threonine, and tyrosine for cell signaling. These are the main regulatory post-translational modifications in eukaryotic cells but the protein phosphorylation of prokaryotes are less intensely studied. While serine, threonine, and tyrosine are phosphorylated in eukaryotes, histidine and aspartate is phosphorylated in prokaryotes and eukaryotes. In bacteria, histidine phosphorylation occurs in the phosphoenolpyruvate-dependent phosphotransferase systems (PTSs), which are involved in the process of internalization as well as the phosphorylation of sugars. [79]

Protein phosphorylation by protein kinase was first shown in E. coli and Salmonella typhimurium and has since been demonstrated in many other bacterial cells. [80] It was found that bacteria use histidine and aspartate phosphorylation as a model for bacterial signaling transduction. Serine, threonine and tyrosine phosphorylation are also present in bacteria. Bacteria carry kinases and phosphatases similar to that of their eukaryotic equivalent and have also developed unique kinases and phosphatases not found in eukaryotes. [79]

Pathology

Abnormal protein phosphorylation has been implicated in a number of diseases, including cancer, Alzheimer's disease, Parkinson's disease, and other degenerative disorders.

Tau protein belongs to a group of microtubule associated proteins (MAPs) which help stabilize microtubules in cells, including neurons. [81] Association and stabilizing activity of tau protein depends on its phosphorylated state. In Alzheimer's disease, due to misfoldings and abnormal conformational changes in tau protein structure, it is rendered ineffective at binding to microtubules and unable to keep the neural cytoskeletal structure organized during neural processes. Abnormal tau inhibits and disrupts microtubule organization and disengages normal tau from microtubules into cytosolic phase. [82] The misfoldings lead to the abnormal aggregation into fibrillary tangles inside the neurons. The tau protein needs to be phosphorylated to function, but hyperphosphorylation of tau protein is one of the major influences on its incapacity to associate. [82] Phosphatases PP1, PP2A, PP2B, and PP2C dephosphorylate tau protein in vitro, and their activities are reduced in areas of the brain in Alzheimer patients. [82] [83] Tau phosphoprotein is three to fourfold hyperphosphorylated in an Alzheimer patient compared to an aged non-afflicted individual. Alzheimer disease tau seems to remove MAP1 and MAP2 (two other major associated proteins) from microtubules and this deleterious effect is reversed when dephosphorylation is performed, evidencing hyperphosphorylation as the sole cause of the crippling activity. [82]

Parkinson's disease

α-Synuclein is a protein that is associated with Parkinson's disease. [84] In humans, this protein is encoded by the SNCA gene. [85] α-Synuclein is involved in recycling synaptic vesicles that carry neurotransmitters and naturally occurs in an unfolded form. Elevated levels of α-Synuclein are found in patients with Parkinson's disease. There is a correlation between the concentration of unphosphorylated α-Synuclein present in the patient and the severity of Parkinson's disease. [86] Specifically, phosphorylation of Ser129 in α-Synuclein has an impact on severity. Healthy patients have higher levels of unphosphorylated α-Synuclein than patients with Parkinson's disease. The measurement of change in the ratio of concentrations of phosphorylated α-Synuclein to unphosphorylated α-Synuclein within a patient could be a marker of the disease progression. Antibodies that target α-Synuclein at phosphorylated Ser129 are used to study the molecular aspects of synucleinopathies. [87] [88]

Phosphorylation of Ser129 is associated with the aggregation of the protein and further damage to the nervous system. The aggregation of phosphorylated α-Synuclein can be enhanced if a presynaptic scaffold protein, Sept4, is present in insufficient quantities. Direct interaction of α-Synuclein with Sept4 inhibits the phosphorylation of Ser129. [89] [90] [91] However, phosphorylation of Ser129 can be observed without synuclein aggregation in conditions of overexpression. [92]

Related Research Articles

<span class="mw-page-title-main">Protein kinase</span> Enzyme that adds phosphate groups to other proteins

A protein kinase is a kinase which selectively modifies other proteins by covalently adding phosphates to them (phosphorylation) as opposed to kinases which modify lipids, carbohydrates, or other molecules. Phosphorylation usually results in a functional change of the target protein (substrate) by changing enzyme activity, cellular location, or association with other proteins. The human genome contains about 500 protein kinase genes and they constitute about 2% of all human genes. There are two main types of protein kinase. The great majority are serine/threonine kinases, which phosphorylate the hydroxyl groups of serines and threonines in their targets. Most of the others are tyrosine kinases, although additional types exist. Protein kinases are also found in bacteria and plants. Up to 30% of all human proteins may be modified by kinase activity, and kinases are known to regulate the majority of cellular pathways, especially those involved in signal transduction.

A protein phosphatase is a phosphatase enzyme that removes a phosphate group from the phosphorylated amino acid residue of its substrate protein. Protein phosphorylation is one of the most common forms of reversible protein posttranslational modification (PTM), with up to 30% of all proteins being phosphorylated at any given time. Protein kinases (PKs) are the effectors of phosphorylation and catalyse the transfer of a γ-phosphate from ATP to specific amino acids on proteins. Several hundred PKs exist in mammals and are classified into distinct super-families. Proteins are phosphorylated predominantly on Ser, Thr and Tyr residues, which account for 79.3, 16.9 and 3.8% respectively of the phosphoproteome, at least in mammals. In contrast, protein phosphatases (PPs) are the primary effectors of dephosphorylation and can be grouped into three main classes based on sequence, structure and catalytic function. The largest class of PPs is the phosphoprotein phosphatase (PPP) family comprising PP1, PP2A, PP2B, PP4, PP5, PP6 and PP7, and the protein phosphatase Mg2+- or Mn2+-dependent (PPM) family, composed primarily of PP2C. The protein Tyr phosphatase (PTP) super-family forms the second group, and the aspartate-based protein phosphatases the third. The protein pseudophosphatases form part of the larger phosphatase family, and in most cases are thought to be catalytically inert, instead functioning as phosphate-binding proteins, integrators of signalling or subcellular traps. Examples of membrane-spanning protein phosphatases containing both active (phosphatase) and inactive (pseudophosphatase) domains linked in tandem are known, conceptually similar to the kinase and pseudokinase domain polypeptide structure of the JAK pseudokinases. A complete comparative analysis of human phosphatases and pseudophosphatases has been completed by Manning and colleagues, forming a companion piece to the ground-breaking analysis of the human kinome, which encodes the complete set of ~536 human protein kinases.

<span class="mw-page-title-main">Kinase</span> Enzyme catalyzing transfer of phosphate groups onto specific substrates

In biochemistry, a kinase is an enzyme that catalyzes the transfer of phosphate groups from high-energy, phosphate-donating molecules to specific substrates. This process is known as phosphorylation, where the high-energy ATP molecule donates a phosphate group to the substrate molecule. As a result, kinase produces a phosphorylated substrate and ADP. Conversely, it is referred to as dephosphorylation when the phosphorylated substrate donates a phosphate group and ADP gains a phosphate group. These two processes, phosphorylation and dephosphorylation, occur four times during glycolysis.

<span class="mw-page-title-main">Phosphatase</span> Enzyme which catalyzes the removal of a phosphate group from a molecule

In biochemistry, a phosphatase is an enzyme that uses water to cleave a phosphoric acid monoester into a phosphate ion and an alcohol. Because a phosphatase enzyme catalyzes the hydrolysis of its substrate, it is a subcategory of hydrolases. Phosphatase enzymes are essential to many biological functions, because phosphorylation and dephosphorylation serve diverse roles in cellular regulation and signaling. Whereas phosphatases remove phosphate groups from molecules, kinases catalyze the transfer of phosphate groups to molecules from ATP. Together, kinases and phosphatases direct a form of post-translational modification that is essential to the cell's regulatory network.

<span class="mw-page-title-main">Cyclin-dependent kinase</span> Class of enzymes

Cyclin-dependent kinases (CDKs) are a predominant group of serine/threonine protein kinases involved in the regulation of the cell cycle and its progression, ensuring the integrity and functionality of cellular machinery. These regulatory enzymes play a crucial role in the regulation of eukaryotic cell cycle and transcription, as well as DNA repair, metabolism, and epigenetic regulation, in response to several extracellular and intracellular signals. They are present in all known eukaryotes, and their regulatory function in the cell cycle has been evolutionarily conserved. The catalytic activities of CDKs are regulated by interactions with CDK inhibitors (CKIs) and regulatory subunits known as cyclins. Cyclins have no enzymatic activity themselves, but they become active once they bind to CDKs. Without cyclin, CDK is less active than in the cyclin-CDK heterodimer complex. CDKs phosphorylate proteins on serine (S) or threonine (T) residues. The specificity of CDKs for their substrates is defined by the S/T-P-X-K/R sequence, where S/T is the phosphorylation site, P is proline, X is any amino acid, and the sequence ends with lysine (K) or arginine (R). This motif ensures CDKs accurately target and modify proteins, crucial for regulating cell cycle and other functions. Deregulation of the CDK activity is linked to various pathologies, including cancer, neurodegenerative diseases, and stroke.

Maturation-promoting factor (abbreviated MPF, also called mitosis-promoting factor or M-Phase-promoting factor) is the cyclin–Cdk complex that was discovered first in frog eggs. It stimulates the mitotic and meiotic phases of the cell cycle. MPF promotes the entrance into mitosis (the M phase) from the G2 phase by phosphorylating multiple proteins needed during mitosis. MPF is activated at the end of G2 by a phosphatase, which removes an inhibitory phosphate group added earlier.

In biochemistry, dephosphorylation is the removal of a phosphate group from an organic compound by hydrolysis. It is a reversible post-translational modification. Dephosphorylation and its counterpart, phosphorylation, activate and deactivate enzymes by detaching or attaching phosphoric esters and anhydrides. A notable occurrence of dephosphorylation is the conversion of ATP to ADP and inorganic phosphate.

<span class="mw-page-title-main">Serine/threonine-specific protein kinase</span> Class of protein kinase enzymes

A serine/threonine protein kinase is a kinase enzyme, in particular a protein kinase, that phosphorylates the OH group of the amino-acid residues serine or threonine, which have similar side chains. At least 350 of the 500+ human protein kinases are serine/threonine kinases (STK).

<span class="mw-page-title-main">Phosphorylase kinase</span>

Phosphorylase kinase (PhK) is a serine/threonine-specific protein kinase which activates glycogen phosphorylase to release glucose-1-phosphate from glycogen. PhK phosphorylates glycogen phosphorylase at two serine residues, triggering a conformational shift which favors the more active glycogen phosphorylase “a” form over the less active glycogen phosphorylase b.

In molecular biology, biochemistry and cell signaling the kinome of an organism is the complete set of protein kinases encoded in its genome. Kinases are usually enzymes that catalyze phosphorylation reactions and fall into several groups and families, e.g., those that phosphorylate the amino acids serine and threonine, those that phosphorylate tyrosine and some that can phosphorylate both, such as the MAP2K and GSK families. The term was first used in 2002 by Gerard Manning and colleagues in twin papers analyzing the 518 human protein kinases, and refers to both protein kinases and protein pseudokinases and their evolution of protein kinases throughout the eukaryotes. Other kinomes have been determined for rice, several fungi, nematodes, and insects, sea urchins, Dictyostelium discoideum, and the process of infection by Mycobacterium tuberculosis. Although the primary sequence of protein kinases shows substantial divergence between unrelated eukaryotes, and amino acid differences in catalytic motifs have permitted their separation of kinomes into canonical and pseudokinase subtypes, the variation found in the amino acid motifs adjacent to the site of actual phosphorylation of substrates by eukaryotic kinases is much smaller.

<span class="mw-page-title-main">Wee1</span> Nuclear protein

Wee1 is a nuclear kinase belonging to the Ser/Thr family of protein kinases in the fission yeast Schizosaccharomyces pombe. Wee1 has a molecular mass of 96 kDa and is a key regulator of cell cycle progression. It influences cell size by inhibiting the entry into mitosis, through inhibiting Cdk1. Wee1 has homologues in many other organisms, including mammals.

<span class="mw-page-title-main">Phosphomimetics</span> Amino acid substitutions that mimic a phosphorylated protein

Phosphomimetics are amino acid substitutions that mimic a phosphorylated protein, thereby activating the protein. Within cells, proteins are commonly modified at serine, tyrosine and threonine amino acids by adding a phosphate group. Phosphorylation is a common mode of activating or deactivating a protein as a form of regulation. However some non-phosphorylated amino acids appear chemically similar to phosphorylated amino acids. Therefore, by replacing an amino acid, the protein may maintain a higher level of activity. For example, aspartic acid can be considered chemically similar to phospho-serine, due to it also carrying a negative charge. Therefore, when an aspartic acid replaces a serine, it is a phosphomimetic of phospho-serine and can imitate the protein always in its phosphorylated form. However, differences in between the phosphomimetics compound and the phosphorylated residue, notably differences in ramachandran distributions, charge states and size, can alter the protein sufficiently to result in significant differences in behavior. Phosphonate-based compounds have been used as phosphotyrosine analogues, as they are less enzyme labile and are physiologically more stable.

<span class="mw-page-title-main">Protein arginine phosphatase</span> Enzyme that catalyzes the dephosphorylation of phosphoarginine residues in proteins

Protein Arginine Phosphatase (PAPs), also known as Phosphoarginine Phosphatase, is an enzyme that catalyzes the dephosphorylation of phosphoarginine residues in proteins. Protein phosphatases (PPs) are "obligatory heteromers" made up of two maximum catalytic subunits attached to a non-catalytic subunit. Arginine modification is a post-translational protein modification in gram-positive bacteria. McsB and YwIE were recently identified as phosphorylating enzymes in Bacillus Subtilis (B.Subtilis). YwIE was thought to be a protein-tyrosine-phosphatase, and McsB a tyrosine-kinase, however in 2012 Elsholz et al. showed that McsB is a protein-arginine-kinase (PAK) and YwlE is a phosphatase-arginine-phosphatase (PAP).

H3S10P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 10th serine residue of the histone H3 protein.

H3S28P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 28th serine residue of the histone H3 protein.

H3Y41P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 41st tyrosine residue of the histone H3 protein.

H3T45P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 45th threonine residue of the histone H3 protein.

H3T11P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 11th threonine residue of the histone H3 protein.

H3T3P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation the 3rd threonine residue of the histone H3 protein.

H3T6P is an epigenetic modification to the DNA packaging protein histone H3. It is a mark that indicates the phosphorylation of the 6th threonine residue of the histone H3 protein.

References

  1. ↑ Cohen, Philip (2002-05-01). "The origins of protein phosphorylation". Nature Cell Biology. 4 (5): E127–130. doi:10.1038/ncb0502-e127. ISSN   1465-7392. PMID   11988757. S2CID   29601670.
  2. 1 2 3 4 5 Vlastaridis, Panayotis; Kyriakidou, Pelagia; Chaliotis, Anargyros; Van de Peer, Yves; Oliver, Stephen G.; Amoutzias, Grigoris D. (2017-02-01). "Estimating the total number of phosphoproteins and phosphorylation sites in eukaryotic proteomes". GigaScience. 6 (2): 1–11. doi:10.1093/gigascience/giw015. PMC   5466708 . PMID   28327990.
  3. ↑ Ilan Smoly, Netta Shemesh, Michal Ziv-Ukelson, Anat Ben-Zvi, Esti Yeger-Lotem (January 2017). "An Asymmetrically Balanced Organization of Kinases versus Phosphatases across Eukaryotes Determines Their Distinct Impacts". PLOS Computational Biology. 13 (1): e1005221. Bibcode:2017PLSCB..13E5221S. doi: 10.1371/journal.pcbi.1005221 . PMC   5279721 . PMID   28135269.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  4. ↑ Potel, Clement M.; Lin, Miao-Hsia; Heck, Albert J. R.; Lemeer, Simone (March 2018). "Widespread bacterial protein histidine phosphorylation revealed by mass spectrometry-based proteomics". Nature Methods. 15 (3): 187–190. doi:10.1038/nmeth.4580. hdl: 1874/362159 . ISSN   1548-7105. PMID   29377012. S2CID   3367416.
  5. 1 2 3 Fuhs SR, Meisenhelder J, Aslanian A, Ma L, Zagorska A, Stankova M, Binnie A, Al-Obeidi F, Mauger J, Lemke G, Yates JR 3rd, Hunter T (2015). "Monoclonal 1- and 3-Phosphohistidine Antibodies: New Tools to Study Histidine Phosphorylation". Cell. 162 (1): 198–210. doi:10.1016/j.cell.2015.05.046. PMC   4491144 . PMID   26140597.
  6. ↑ Hardman G, Perkins S, Brownridge PJ, Clarke CJ, Byrne DP, Campbell AE, Kalyuzhnyy A, Myall A, Eyers PA, Jones AR, Eyers CE (2019). "Strong anion exchange-mediated phosphoproteomics reveals extensive human non-canonical phosphorylation". EMBO J. 38 (21): e100847. doi:10.15252/embj.2018100847. PMC   6826212 . PMID   31433507.
  7. 1 2 Fuhs SR, Hunter T (2017). "pHisphorylation: the emergence of histidine phosphorylation as a reversible regulatory modification". Curr Opin Cell Biol. 45: 8–16. doi:10.1016/j.ceb.2016.12.010. PMC   5482761 . PMID   28129587.
  8. ↑ Cieśla J; Frączyk T; Rode W (2011). "Phosphorylation of basic amino acid residues in proteins: important but easily missed" (PDF). Acta Biochimica Polonica. 58 (2): 137–147. doi: 10.18388/abp.2011_2258 . PMID   21623415.
  9. 1 2 Levene PA; Alsberg CL (1906). "The cleavage products of vitellin". J. Biol. Chem. 2 (1): 127–133. doi: 10.1016/S0021-9258(17)46054-6 .
  10. 1 2 Burnett G; Kennedy EP (December 1954). "The enzymatic phosphorylation of proteins". J. Biol. Chem. 211 (2): 969–80. doi: 10.1016/S0021-9258(18)71184-8 . PMID   13221602.
  11. ↑ Lipmann FA; Levene PA (October 1932). "Serinephosphoric acid obtained on hydrolysis of vitellinic acid". J. Biol. Chem. 98 (1): 109–114. doi: 10.1016/S0021-9258(18)76142-5 .
  12. ↑ Kresge, Nicole; Simoni, Robert D.; Hill, Robert L. (2011-01-21). "The Process of Reversible Phosphorylation: the Work of Edmond H. Fischer". Journal of Biological Chemistry. 286 (3): e1–e2. doi: 10.1074/jbc.O110.000242 . ISSN   0021-9258. PMC   3023531 . PMID   21294299.
  13. ↑ Hunter, Tony (2015-06-30). "Discovering the first tyrosine kinase". Proceedings of the National Academy of Sciences. 112 (26): 7877–7882. Bibcode:2015PNAS..112.7877H. doi: 10.1073/pnas.1508223112 . ISSN   0027-8424. PMC   4491733 . PMID   26130799.
  14. ↑ Fischer, Edmond H. (2010). "Phosphorylase and the origin of reversible protein phosphorylation". Biological Chemistry. 391 (2/3): 131–7. doi:10.1515/bc.2010.011. PMID   20030590. S2CID   29724939.
  15. 1 2 Cohen, Philip (2002-05-01). "The origins of protein phosphorylation". Nature Cell Biology. 4 (5): E127–130. doi:10.1038/ncb0502-e127. ISSN   1465-7392. PMID   11988757. S2CID   29601670.
  16. ↑ "The Nobel Prize in Physiology or Medicine 1992". www.nobelprize.org. Retrieved 2016-05-19.
  17. 1 2 Cozzone AJ (1988). "Protein phosphorylation in prokaryotes". Annu. Rev. Microbiol. 42: 97–125. doi:10.1146/annurev.mi.42.100188.000525. PMID   2849375.
  18. 1 2 Stock JB; Ninfa AJ; Stock AM (December 1989). "Protein phosphorylation and regulation of adaptive responses in bacteria". Microbiol. Rev. 53 (4): 450–90. doi:10.1128/MMBR.53.4.450-490.1989. PMC   372749 . PMID   2556636.
  19. ↑ Chang C; Stewart RC (July 1998). "The Two-Component System. Regulation of Diverse Signaling Pathways in Prokaryotes and Eukaryotes". Plant Physiol. 117 (3): 723–31. doi:10.1104/pp.117.3.723. PMC   1539182 . PMID   9662515.
  20. ↑ Barford D; Das AK; Egloff MP (1998). "The structure and mechanism of protein phosphatases: insights into catalysis and regulation". Annu. Rev. Biophys. Biomol. Struct. 27: 133–64. doi:10.1146/annurev.biophys.27.1.133. PMID   9646865. S2CID   12138601.
  21. ↑ Pietack, Nico; Becher, Dörte; Schmidl, Sebastian R.; Saier, Milton H.; Hecker, Michael; Commichau, Fabian M.; Stülke, Jörg (2010). "In vitro phosphorylation of key metabolic enzymes from Bacillus subtilis: PrkC phosphorylates enzymes from different branches of basic metabolism". Journal of Molecular Microbiology and Biotechnology. 18 (3): 129–140. doi:10.1159/000308512. ISSN   1660-2412. PMID   20389117. S2CID   19535600.
  22. ↑ Schmidl, Sebastian R.; Gronau, Katrin; Pietack, Nico; Hecker, Michael; Becher, Dörte; Stülke, Jörg (June 2010). "The phosphoproteome of the minimal bacterium Mycoplasma pneumoniae: analysis of the complete known Ser/Thr kinome suggests the existence of novel kinases". Molecular & Cellular Proteomics. 9 (6): 1228–1242. doi: 10.1074/mcp.M900267-MCP200 . ISSN   1535-9484. PMC   2877983 . PMID   20097688.
  23. ↑ Bodenmiller, Bernd; Wanka, Stefanie; Kraft, Claudine; Urban, Jörg; Campbell, David; Pedrioli, Patrick G.; Gerrits, Bertran; Picotti, Paola; Lam, Henry; Vitek, Olga; Brusniak, Mi-Youn (2010-12-21). "Phosphoproteomic analysis reveals interconnected system-wide responses to perturbations of kinases and phosphatases in yeast". Science Signaling. 3 (153): rs4. doi:10.1126/scisignal.2001182. ISSN   1937-9145. PMC   3072779 . PMID   21177495.
  24. ↑ Yachie, Nozomu; Saito, Rintaro; Sugiyama, Naoyuki; Tomita, Masaru; Ishihama, Yasushi (2011-01-27). "Integrative features of the yeast phosphoproteome and protein-protein interaction map". PLOS Computational Biology. 7 (1): e1001064. Bibcode:2011PLSCB...7E1064Y. doi: 10.1371/journal.pcbi.1001064 . ISSN   1553-7358. PMC   3029238 . PMID   21298081.
  25. ↑ Johnson LN, Barford D (1993). "The effects of phosphorylation on the structure and function of proteins[J]". Annual Review of Biophysics and Biomolecular Structure. 22 (1): 199–232. doi:10.1146/annurev.bb.22.060193.001215. PMID   8347989.
  26. 1 2 Ciesla J; Fraczyk T; Rode W (2011). "Phosphorylation of basic amino acid residues in proteins: important but easily missed". Acta Biochim. Pol. 58 (2): 137–47. doi: 10.18388/abp.2011_2258 . PMID   21623415.
  27. ↑ Deutscher, J.; Saier, J. (2005). "Ser/Thr/Tyr Protein Phosphorylation in Bacteria – for Long Time Neglected, Now Well Established". Journal of Molecular Microbiology and Biotechnology. 9 (3–4): 125–131. doi:10.1159/000089641. PMID   16415586. S2CID   13093867.
  28. ↑ Ashcroft M; Kubbutat MH; Vousden KH (March 1999). "Regulation of p53 Function and Stability by Phosphorylation". Mol. Cell. Biol. 19 (3): 1751–8. doi:10.1128/mcb.19.3.1751. PMC   83968 . PMID   10022862.
  29. ↑ Bates S; Vousden KH (February 1996). "p53 in signaling checkpoint arrest or apoptosis". Curr. Opin. Genet. Dev. 6 (1): 12–8. doi:10.1016/S0959-437X(96)90004-0. PMID   8791489.
  30. ↑ learnwithalbert (2016-09-16). "What is the Difference Between Phosphorylation and Dephosphorylation?". Albert Blog. Retrieved 2019-02-01.
  31. 1 2 van Weeren PC; de Bruyn KM; de Vries-Smits AM; van Lint J; Burgering BM (May 1998). "Essential role for protein kinase B (PKB) in insulin-induced glycogen synthase kinase 3 inactivation. Characterization of dominant-negative mutant of PKB". J. Biol. Chem. 273 (21): 13150–6. doi: 10.1074/jbc.273.21.13150 . PMID   9582355.
  32. 1 2 Cole PA; Shen K; Qiao Y; Wang D (October 2003). "Protein tyrosine kinases Src and Csk: a tail's tale". Curr Opin Chem Biol. 7 (5): 580–5. doi:10.1016/j.cbpa.2003.08.009. PMID   14580561.
  33. ↑ Zubareva, V. M.; Lapashina, A. S.; Shugaeva, T. E.; Litvin, A. V.; Feniouk, B. A. (December 2020). "Rotary Ion-Translocating ATPases/ATP Synthases: Diversity, Similarities, and Differences". Biochemistry. Biokhimiia. 85 (12): 1613–1630. doi:10.1134/S0006297920120135. ISSN   1608-3040. PMID   33705299. S2CID   229701146.
  34. 1 2 Broch Trentini, Débora (2016). "Arginine phosphorylation marks proteins for degradation by a Clp protease". Nature. 539 (7627): 48–53. Bibcode:2016Natur.539...48T. doi:10.1038/nature20122. PMC   6640040 . PMID   27749819.
  35. ↑ Johnson, Louise N. (2009-08-01). "The regulation of protein phosphorylation". Biochemical Society Transactions. 37 (Pt 4): 627–641. doi:10.1042/BST0370627. ISSN   1470-8752. PMID   19614568.
  36. ↑ Rogakou EP, Pilch DR, Orr AH, Ivanova VS, Bonner WM (March 1998). "DNA double-stranded breaks induce histone H2AX phosphorylation on serine 139". J. Biol. Chem. 273 (10): 5858–68. doi: 10.1074/jbc.273.10.5858 . PMID   9488723.
  37. ↑ Carter RJ, Parsons JL (May 2016). "Base Excision Repair, a Pathway Regulated by Posttranslational Modifications". Mol. Cell. Biol. 36 (10): 1426–37. doi:10.1128/MCB.00030-16. PMC   4859697 . PMID   26976642.
  38. ↑ Babior BM (March 1999). "NADPH oxidase: an update". Blood. 93 (5): 1464–76. doi:10.1182/blood.V93.5.1464. PMID   10029572.
  39. ↑ Olsen JV; Blagoev B; Gnad F; Macek B; Kumar C; Mortensen P; Mann M (November 2006). "Global, in vivo, and site-specific phosphorylation dynamics in signaling networks". Cell. 127 (3): 635–48. doi: 10.1016/j.cell.2006.09.026 . PMID   17081983. S2CID   7827573.
  40. ↑ Li-Rong Y; Issaq HJ; Veenstra TD (2007). "Phosphoproteomics for the discovery of kinases as cancer biomarkers and drug targets". Proteomics: Clinical Applications. 1 (9): 1042–1057. doi:10.1002/prca.200700102. PMID   21136756. S2CID   33999702.
  41. ↑ Fiedler D, Braberg H, Mehta M, Chechik G, Cagney G, Mukherjee P, Silva AC, Shales M, et al. (2009). "Functional Organization of the S. cerevisiae Phosphorylation Network". Cell. 136 (5): 952–963. doi:10.1016/j.cell.2008.12.039. PMC   2856666 . PMID   19269370.
  42. ↑ Schoeberl, B; Eichler-Jonsson, C; Gilles, ED; Müller, G (Apr 2002). "Computational modeling of the dynamics of the MAP kinase cascade activated by surface and internalized EGF receptors". Nature Biotechnology. 20 (4): 370–5. doi:10.1038/nbt0402-370. PMID   11923843. S2CID   9851026.
  43. ↑ Aldridge, BB; Burke, JM; Lauffenburger, DA; Sorger, PK (Nov 2006). "Physicochemical modelling of cell signalling pathways". Nature Cell Biology. 8 (11): 1195–203. doi:10.1038/ncb1497. PMID   17060902. S2CID   14586526.
  44. ↑ Zhu, F; Guan, Y (Jun 11, 2014). "Predicting Dynamic Signaling Network Response under Unseen Perturbations". Bioinformatics. 30 (19): 2772–8. doi:10.1093/bioinformatics/btu382. PMC   4173019 . PMID   24919880.
  45. ↑ Sawicka, Anna; Seiser, Christian (2014-08-01). "Sensing core histone phosphorylation — A matter of perfect timing". Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms. 1839 (8): 711–718. doi:10.1016/j.bbagrm.2014.04.013. PMC   4103482 . PMID   24747175.
  46. ↑ Rossetto, Dorine; Avvakumov, Nikita; Côté, Jacques (2012-10-01). "Histone phosphorylation". Epigenetics. 7 (10): 1098–1108. doi:10.4161/epi.21975. ISSN   1559-2294. PMC   3469451 . PMID   22948226.
  47. ↑ Zhang, Ye; Griffin, Karen; Mondal, Neelima; Parvin, Jeffrey D. (2004-05-21). "Phosphorylation of Histone H2A Inhibits Transcription on Chromatin Templates". Journal of Biological Chemistry. 279 (21): 21866–21872. doi: 10.1074/jbc.M400099200 . ISSN   0021-9258. PMID   15010469.
  48. ↑ Grisham, Reginald H. Garrett, Charles M. (2013). Biochemistry (5th ed.). Belmont, CA: Brooks/Cole, Cengage Learning. ISBN   978-1133106296.{{cite book}}: CS1 maint: multiple names: authors list (link)
  49. ↑ Gonzalez-Sanchez MB, Lanucara F, Helm M, Eyers CE (2013). "Attempting to rewrite History: challenges with the analysis of histidine-phosphorylated peptides". Biochem Soc Trans. 41 (4): 1089–1095. doi:10.1042/bst20130072. PMID   23863184.
  50. ↑ Thomason P; Kay R (September 2000). "Eukaryotic signal transduction via histidine-aspartate phosphorelay" (PDF). J. Cell Sci. 113 (18): 3141–50. doi:10.1242/jcs.113.18.3141. PMID   10954413.
  51. ↑ Puttick, Jennifer; Baker, Edward N.; Delbaere, Louis T.J. (2008). "Histidine phosphorylation in biological systems". Biochimica et Biophysica Acta (BBA) - Proteins and Proteomics. 1784 (1): 100–105. doi:10.1016/j.bbapap.2007.07.008. ISSN   1570-9639. PMID   17728195.
  52. ↑ Lemmon, Mark A.; Schlessinger, Joseph (June 2010). "Cell signaling by receptor tyrosine kinases". Cell. 141 (7): 1117–34. doi:10.1016/j.cell.2010.06.011. PMC   2914105 . PMID   20602996.
  53. ↑ Cho HS, Leahy DJ; Leahy (2002). "Structure of the extracellular region of HER3 reveals an interdomain tether". Science. 297 (5585): 1330–1333. Bibcode:2002Sci...297.1330C. doi: 10.1126/science.1074611 . PMID   12154198. S2CID   23069349.
  54. ↑ Morgan, David O. (2007). The Cell Cycle: Principles of Control. London: New Science Press, 1st ed.
  55. ↑ Garrett, Reginald H.; Grisham, Charles m. (2013). Biochemistry. Mary Finch, Cengage Learning. pp. 489–491.
  56. ↑ Ninfa, Alexander; David P. Ballou, David (1998). Fundamental Laboratory Approaches for Biochemistry and Biotechnology (2nd ed.). Fitzgerald Science Press. pp. 230–231.
  57. ↑ Ullah, Shahid; Lin, Shaofeng (2016). "dbPAF: an integrative database of protein phosphorylation in animals and fungi". Scientific Reports. 6: 23534. Bibcode:2016NatSR...623534U. doi:10.1038/srep23534. PMC   4806352 . PMID   27010073 . Retrieved 17 May 2016.
  58. 1 2 Blom, Nikolaj; Gammeltoft, Steen; Brunak, Søren (1999-12-17). "Sequence and structure-based prediction of eukaryotic protein phosphorylation sites1". Journal of Molecular Biology. 294 (5): 1351–1362. doi:10.1006/jmbi.1999.3310. PMID   10600390.
  59. ↑ Huang, Kai-Yao; Lu, Cheng-Tsung; Bretaña, Neil Arvin; Lee, Tzong-Yi; Chang, Tzu-Hao (2013-01-01). "ViralPhos: incorporating a recursively statistical method to predict phosphorylation sites on virus proteins". BMC Bioinformatics. 14 (16): S10. doi: 10.1186/1471-2105-14-S16-S10 . ISSN   1471-2105. PMC   3853219 . PMID   24564381.
  60. ↑ Oussa, N.A. (March 1, 2013). "TRAF1 phosphorylation on Serine 139 modulates NF-κB activity downstream of 4-1BB in T cells". Biochemical and Biophysical Research Communications. 432 (1): 129–134. doi:10.1016/j.bbrc.2013.01.073. PMID   23376065.
  61. ↑ Nadratowska-Wesolowska, B (October 21, 2016). "RSK2 regulates endocytosis of FGF receptor 1 by phosphorylation on serine 789". Oncogene. 33 (40): 4823–4836. doi: 10.1038/onc.2013.425 . PMID   24141780.
  62. ↑ Tanji, Kunikazu (May 3, 2014). "Phosphorylation of serine 349 of p62 in Alzheimer's disease brain". Acta Neuropathologica Communications. 2 (50): 50. doi: 10.1186/2051-5960-2-50 . PMC   4035093 . PMID   24886973.
  63. ↑ Hou, Shihe (November 14, 2003). "Phosphorylation of serine 337 of NF-kappaB p50 is critical for DNA binding". The Journal of Biological Chemistry. 278 (46): 45994–8. doi: 10.1074/jbc.m307971200 . PMID   12947093.
  64. ↑ editor, Kendra K. Bence (2013). Protein tyrosine phosphatase control of metabolism. New York, NY: Springer New York. ISBN   978-1-4614-7855-3.{{cite book}}: |last1= has generic name (help)
  65. ↑ Cozzone, Alain J.; Grangeasse, Christophe; Doublet, Patricia; Duclos, Bertrand (1 March 2004). "Protein phosphorylation on tyrosine in bacteria". Archives of Microbiology. 181 (3): 171–181. doi:10.1007/s00203-003-0640-6. PMID   14745484. S2CID   37161183.
  66. ↑ Eyers CE, Hardman G (August 21, 2019). "Strong anion exchange-mediated phosphoproteomics reveals extensive human non-canonical phosphorylation". The EMBO Journal. 38 (21): e100847. doi:10.15252/embj.2018100847. PMC   6826212 . PMID   31433507.
  67. ↑ Kovacs KA, Steinmann M; Magistretti PJ; Halfon O; Cardinaux JR (Sep 2003). "CCAAT/enhancer-binding protein family members recruit the coactivator CREB-binding protein and trigger its phosphorylation". J. Biol. Chem. 278 (38): 36959–65. doi: 10.1074/jbc.M303147200 . ISSN   0021-9258. PMID   12857754.
  68. ↑ Munton RP, Tweedie-Cullen R, Livingstone-Zatchej M, Weinandy F, Waidelich M, Longo D, Gehrig P, Potthast F, et al. (February 2007). "Qualitative and quantitative analyses of protein phosphorylation in naive and stimulated mouse synaptosomal preparations" (PDF). Mol. Cell. Proteomics. 6 (2): 283–93. doi: 10.1074/mcp.M600046-MCP200 . PMID   17114649. S2CID   18221665.
  69. ↑ Trinidad JC; Thalhammer A; Specht CG; Lynn AJ; Baker PR; Schoepfer R; Burlingame AL (April 2008). "Quantitative analysis of synaptic phosphorylation and protein expression". Mol. Cell. Proteomics. 7 (4): 684–96. doi: 10.1074/mcp.M700170-MCP200 . PMID   18056256.
  70. ↑ Frese, Christian; Houjiang Zhou; Thomas Taus; A. F. Maarten Altelaar; Karl Mechtler; Albert J. R. Heck; Shabaz Mohammed (March 1, 2013). "Unambiguous Phosphosite Localization using Electron-Transfer/Higher-Energy Collision Dissociation (EThcD)". J Proteome Res. 12 (3): 1520–1525. doi:10.1021/pr301130k. PMC   3588588 . PMID   23347405.
  71. ↑ Gerber SA; Rush J; Stemman O; Kirschner MW; Gygi SP (June 2003). "Absolute quantification of proteins and phosphoproteins from cell lysates by tandem MS". Proc. Natl. Acad. Sci. U.S.A. 100 (12): 6940–5. Bibcode:2003PNAS..100.6940G. doi: 10.1073/pnas.0832254100 . PMC   165809 . PMID   12771378.
  72. ↑ Gygi SP; Rist B; Griffin TJ; Eng J; Aebersold R (2002). "Proteome analysis of low-abundance proteins using multidimensional chromatography and isotope-coded affinity tags". J. Proteome Res. 1 (1): 47–54. doi:10.1021/pr015509n. PMID   12643526.
  73. ↑ Olive DM (October 2004). "Quantitative methods for the analysis of protein phosphorylation in drug development". Expert Rev Proteomics. 1 (3): 327–41. doi:10.1586/14789450.1.3.327. PMID   15966829. S2CID   30003827.
  74. ↑ Chen H, Kovar J, Sissons S, Cox K, Matter W, Chadwell F, Luan P, Vlahos CJ, et al. (March 2005). "A cell-based immunocytockemical assay for monitoring kinase signaling pathways and drug efficacy" (PDF). Anal. Biochem. 338 (1): 136–42. CiteSeerX   10.1.1.335.3523 . doi:10.1016/j.ab.2004.11.015. PMID   15707944. Archived from the original (PDF) on 2012-02-22. Retrieved 2019-05-26.
  75. ↑ Cohen P (2000). "The regulation of protein function by multisite phosphorylation – a 25 year update". Trends Biochem. Sci. 25 (12): 596–601. doi:10.1016/S0968-0004(00)01712-6. PMID   11116185.
  76. ↑ Pearlman SM, Serber Z, Ferrell JE (2011). "A Mechanism for the Evolution of Phosphorylation Sites". Cell. 147 (4): 934–946. doi:10.1016/j.cell.2011.08.052. PMC   3220604 . PMID   22078888.
  77. ↑ Holt LJ, Tuch BB, Villén J, Johnson AD, Gygi SP, Morgan DO (2009). "Global Analysis of Cdk1 Substrate Phosphorylation Sites Provides Insights into Evolution". Science. 325 (5948): 1682–1686. Bibcode:2009Sci...325.1682H. doi:10.1126/science.1172867. PMC   2813701 . PMID   19779198.
  78. ↑ Garcia-Garcia, Transito (2016). "Role Of Protein Phosphorylation In The Regulation Of Cell Cycle And DNA-Related Processes In Bacteria". Frontiers in Microbiology. 7: 184. doi: 10.3389/fmicb.2016.00184 . PMC   4754617 . PMID   26909079.
  79. 1 2 Macek, B.; Mijakovic, I.; Olsen, J.; Gnad, F; Kumar, C.; Jensen, P. (2007). "The serine/threonine/tyrosine phosphoproteome of the model bacterium Bacillus subtilis". Mol. Cell. Proteomics. 6 (4): 697–707. doi: 10.1074/mcp.m600464-mcp200 . PMID   17218307.
  80. ↑ Cozzone, AJ (1988). "Protein phosphorylation in prokaryotes". Annu Rev Microbiol. 42: 97–125. doi:10.1146/annurev.mi.42.100188.000525. PMID   2849375.
  81. ↑ Wolfe, Michael S. (2012-12-19). "The Role of Tau in Neurodegenerative Diseases and Its Potential as a Therapeutic Target". Scientifica. 2012: 796024. doi: 10.6064/2012/796024 . PMC   3820460 . PMID   24278740.
  82. 1 2 3 4 Kolarova, Michala; García-Sierra, Francisco; Bartos, Ales; Ricny, Jan; Ripova, Daniela (2012-05-29). "Structure and Pathology of Tau Protein in Alzheimer Disease". International Journal of Alzheimer's Disease. 2012: 731526. doi: 10.1155/2012/731526 . ISSN   2090-8024. PMC   3368361 . PMID   22690349.
  83. ↑ Crespo-Biel, Natalia; Theunis, Clara; Leuven, Fred Van (2012-06-08). "Protein Tau: Prime Cause of Synaptic and Neuronal Degeneration in Alzheimer's Disease". International Journal of Alzheimer's Disease. 2012: 251426. doi: 10.1155/2012/251426 . ISSN   2090-8024. PMC   3376502 . PMID   22720188.
  84. ↑ Spillantini, MG; Crowther, RA; Jakes, R; Hasegawa, M; Goedert, M (26 May 1998). "alpha-Synuclein in filamentous inclusions of Lewy bodies from Parkinson's disease and dementia with lewy bodies". Proceedings of the National Academy of Sciences of the United States of America. 95 (11): 6469–73. Bibcode:1998PNAS...95.6469S. doi: 10.1073/pnas.95.11.6469 . PMC   27806 . PMID   9600990.
  85. ↑ "Genetics Home Reference: SNCA". U.S. National Library of Medicine. 12 Nov 2013. Retrieved 14 Nov 2013.
  86. ↑ Burré, J; Sharma, M; Südhof, TC (1 March 2018). "Cell Biology and Pathophysiology of α-Synuclein". Cold Spring Harbor Perspectives in Medicine. 8 (3): a024091. doi:10.1101/cshperspect.a024091. PMC   5519445 . PMID   28108534.
  87. ↑ Rutherford, NJ; Brooks, M; Giasson, BI (8 August 2016). "Novel antibodies to phosphorylated α-synuclein serine 129 and NFL serine 473 demonstrate the close molecular homology of these epitopes". Acta Neuropathologica Communications. 4 (1): 80. doi: 10.1186/s40478-016-0357-9 . PMC   4977832 . PMID   27503460.
  88. ↑ Paleologou, KE; Schmid, AW; Rospigliosi, CC; Kim, HY; Lamberto, GR; Fredenburg, RA; Lansbury PT, Jr; Fernandez, CO; Eliezer, D; Zweckstetter, M; Lashuel, HA (13 June 2008). "Phosphorylation at Ser-129 but not the phosphomimics S129E/D inhibits the fibrillation of alpha-synuclein". The Journal of Biological Chemistry. 283 (24): 16895–905. doi: 10.1074/jbc.M800747200 . PMC   2423264 . PMID   18343814.
  89. ↑ "Parkinson's Disease | Elucidating the Role of Phosphorylation in modulating alpha-synuclein aggregation and toxicity in Parkinson's disease and related disorders". Parkinson's Disease | The Michael J. Fox Foundation for Parkinson's Research. Retrieved 2016-05-14.
  90. ↑ Wang, Yu; Shi, Min; Chung, Kathryn A.; Zabetian, Cyrus P.; Leverenz, James B.; Berg, Daniela; Srulijes, Karin; Trojanowski, John Q.; Lee, Virginia M.-Y. (2012-02-15). "Phosphorylated α-Synuclein in Parkinson's Disease". Science Translational Medicine. 4 (121): 121ra20. doi:10.1126/scitranslmed.3002566. ISSN   1946-6234. PMC   3302662 . PMID   22344688.
  91. ↑ Stewart, Tessandra; Sossi, Vesna; Aasly, Jan O; Wszolek, Zbigniew K; Uitti, Ryan J; Hasegawa, Kazuko; Yokoyama, Teruo; Zabetian, Cyrus P; Leverenz, James B (2015-01-31). "Phosphorylated α-synuclein in Parkinson's disease: correlation depends on disease severity". Acta Neuropathologica Communications. 3 (1): 7. doi: 10.1186/s40478-015-0185-3 . ISSN   2051-5960. PMC   4362824 . PMID   25637461.
  92. ↑ Laferrière, Florent; He, Xin; Zinghirino, Federica; Doudnikoff, Evelyne; Faggiani, Emilie; Meissner, Wassilios G.; Bezard, Erwan; De Giorgi, Francesca; Ichas, François (2020-10-29). "Overexpression of α-Synuclein by Oligodendrocytes in Transgenic Mice Does Not Recapitulate the Fibrillar Aggregation Seen in Multiple System Atrophy". Cells. 9 (11): 2371. doi: 10.3390/cells9112371 . ISSN   2073-4409. PMC   7693764 . PMID   33138150.
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