STAT3

Last updated
STAT3
Stat3 structure.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases STAT3 , ADMIO, APRF, HIES, signal transducer and activator of transcription 3, ADMIO1
External IDs OMIM: 102582 MGI: 103038 HomoloGene: 7960 GeneCards: STAT3
Orthologs
SpeciesHumanMouse
Entrez

6774

20848

Ensembl

ENSG00000168610

ENSMUSG00000004040

UniProt

P40763

P42227

RefSeq (mRNA)

NM_011486
NM_213659
NM_213660

RefSeq (protein)

NP_035616
NP_998824
NP_998825

Location (UCSC) Chr 17: 42.31 – 42.39 Mb Chr 11: 100.78 – 100.83 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Signal transducer and activator of transcription 3 (STAT3) is a transcription factor which in humans is encoded by the STAT3 gene. [5] It is a member of the STAT protein family.

Function

STAT3 is a member of the STAT protein family. In response to cytokines and growth factors, STAT3 is phosphorylated by receptor-associated Janus kinases (JAK), forms homo- or heterodimers, and translocates to the cell nucleus where it acts as a transcription activator. Specifically, STAT3 becomes activated after phosphorylation of tyrosine 705 in response to such ligands as interferons, epidermal growth factor (EGF), interleukin (IL-)5 and IL-6. Additionally, activation of STAT3 may occur via phosphorylation of serine 727 by mitogen-activated protein kinases (MAPK) [6] and through c-src non-receptor tyrosine kinase. [7] [8] STAT3 mediates the expression of a variety of genes in response to cell stimuli, and thus plays a key role in many cellular processes such as cell growth and apoptosis. [9]

STAT3-deficient mouse embryos cannot develop beyond embryonic day 7, when gastrulation begins. [10] It appears that at these early stages of development, STAT3 activation is required for self-renewal of embryonic stem cells (ESCs). Indeed, LIF, which is supplied to murine ESC cultures to maintain their undifferentiated state, can be omitted if STAT3 is activated through some other means. [11]

STAT3 is essential for the differentiation of the TH17 helper T cells, which have been implicated in a variety of autoimmune diseases. [12] During viral infection, mice lacking STAT3 in T-cells display impairment in the ability to generate T-follicular helper (Tfh) cells and fail to maintain antibody based immunity. [13]

STAT3 caused upregulation in E-selectin, a factor in metastasis of cancers. [14]

Hyperactivation of STAT3 occurs in COVID-19 infection and other viral infections. [15] [16]

Clinical significance

Loss-of-function mutations in the STAT3 gene result in hyperimmunoglobulin E syndrome, associated with recurrent infections as well as disordered bone and tooth development. [17]

Gain-of-function mutations in the STAT3 gene have been reported to cause multi-organ early onset auto-immune diseases; such as thyroid disease, diabetes, intestinal inflammation, and low blood counts, [18] while constitutive STAT3 activation is associated with various human cancers and commonly suggests poor prognosis. [19] [20] [21] [22] It has anti-apoptotic as well as proliferative effects. [19]

STAT3 can promote oncogenesis by being constitutively active through various pathways as mentioned elsewhere. A tumor suppressor role of STAT3 has also been reported. [23] [24] [25] In the report on human glioblastoma tumor, or brain cancer, STAT3 was shown to have an oncogenic or a tumor suppressor role depending upon the mutational background of the tumor. A direct connection between the PTEN-Akt-FOXO axis (suppressive) and the leukemia inhibitory factor receptor beta (LIFRbeta)-STAT3 signaling pathway (oncogenic) was shown.

Increased activity of STAT3 in cancer cells, leads to changes in the function of protein complexes that control expression of inflammatory genes, with result profound change in the secretome and the cell phenotypes, their activity in the tumor, and their capacity for metastasis. [26]

Interactions

STAT3 has been shown to interact with:

Niclosamide seems to inhibit the STAT3 signalling pathway. [56]

Nicotinamide (a type of vitamin B3) naturally inhibits STAT3. [57] However NAC (Acetylcysteine) inhibits STAT3 inhibitors. [58]

Related Research Articles

The JAK-STAT signaling pathway is a chain of interactions between proteins in a cell, and is involved in processes such as immunity, cell division, cell death, and tumour formation. The pathway communicates information from chemical signals outside of a cell to the cell nucleus, resulting in the activation of genes through the process of transcription. There are three key parts of JAK-STAT signalling: Janus kinases (JAKs), signal transducer and activator of transcription proteins (STATs), and receptors. Disrupted JAK-STAT signalling may lead to a variety of diseases, such as skin conditions, cancers, and disorders affecting the immune system.

<span class="mw-page-title-main">Epidermal growth factor receptor</span> Transmembrane protein

The epidermal growth factor receptor is a transmembrane protein that is a receptor for members of the epidermal growth factor family of extracellular protein ligands.

<span class="mw-page-title-main">Hepatocyte growth factor receptor</span> Mammalian protein found in Homo sapiens

Hepatocyte growth factor receptor is a protein that in humans is encoded by the MET gene. The protein possesses tyrosine kinase activity. The primary single chain precursor protein is post-translationally cleaved to produce the alpha and beta subunits, which are disulfide linked to form the mature receptor.

<span class="mw-page-title-main">Tropomyosin receptor kinase A</span> Protein-coding gene in the species Homo sapiens

Tropomyosin receptor kinase A (TrkA), also known as high affinity nerve growth factor receptor, neurotrophic tyrosine kinase receptor type 1, or TRK1-transforming tyrosine kinase protein is a protein that in humans is encoded by the NTRK1 gene.

<span class="mw-page-title-main">Glycoprotein 130</span> Mammalian protein found in Homo sapiens

Glycoprotein 130 is a transmembrane protein which is the founding member of the class of tall cytokine receptors. It forms one subunit of the type I cytokine receptor within the IL-6 receptor family. It is often referred to as the common gp130 subunit, and is important for signal transduction following cytokine engagement. As with other type I cytokine receptors, gp130 possesses a WSXWS amino acid motif that ensures correct protein folding and ligand binding. It interacts with Janus kinases to elicit an intracellular signal following receptor interaction with its ligand. Structurally, gp130 is composed of five fibronectin type-III domains and one immunoglobulin-like C2-type (immunoglobulin-like) domain in its extracellular portion.

<span class="mw-page-title-main">STAT5</span> Protein family

Signal transducer and activator of transcription 5 (STAT5) refers to two highly related proteins, STAT5A and STAT5B, which are part of the seven-membered STAT family of proteins. Though STAT5A and STAT5B are encoded by separate genes, the proteins are 90% identical at the amino acid level. STAT5 proteins are involved in cytosolic signalling and in mediating the expression of specific genes. Aberrant STAT5 activity has been shown to be closely connected to a wide range of human cancers, and silencing this aberrant activity is an area of active research in medicinal chemistry.

<span class="mw-page-title-main">STAT1</span> Transcription factor and coding gene in humans

Signal transducer and activator of transcription 1 (STAT1) is a transcription factor which in humans is encoded by the STAT1 gene. It is a member of the STAT protein family.

<span class="mw-page-title-main">RET proto-oncogene</span> Mammalian protein

The RETproto-oncogene encodes a receptor tyrosine kinase for members of the glial cell line-derived neurotrophic factor (GDNF) family of extracellular signalling molecules. RET loss of function mutations are associated with the development of Hirschsprung's disease, while gain of function mutations are associated with the development of various types of human cancer, including medullary thyroid carcinoma, multiple endocrine neoplasias type 2A and 2B, pheochromocytoma and parathyroid hyperplasia.

<span class="mw-page-title-main">Janus kinase 2</span> Non-receptor tyrosine kinase and coding gene in humans

Janus kinase 2 is a non-receptor tyrosine kinase. It is a member of the Janus kinase family and has been implicated in signaling by members of the type II cytokine receptor family, the GM-CSF receptor family, the gp130 receptor family, and the single chain receptors.

<span class="mw-page-title-main">Janus kinase 1</span>

JAK1 is a human tyrosine kinase protein essential for signaling for certain type I and type II cytokines. It interacts with the common gamma chain (γc) of type I cytokine receptors, to elicit signals from the IL-2 receptor family, the IL-4 receptor family, the gp130 receptor family. It is also important for transducing a signal by type I (IFN-α/β) and type II (IFN-γ) interferons, and members of the IL-10 family via type II cytokine receptors. Jak1 plays a critical role in initiating responses to multiple major cytokine receptor families. Loss of Jak1 is lethal in neonatal mice, possibly due to difficulties suckling. Expression of JAK1 in cancer cells enables individual cells to contract, potentially allowing them to escape their tumor and metastasize to other parts of the body.

<span class="mw-page-title-main">STAT6</span> Protein and coding gene in humans

Signal transducer and activator of transcription 6 (STAT6) is a transcription factor that belongs to the Signal Transducer and Activator of Transcription (STAT) family of proteins. The proteins of STAT family transmit signals from a receptor complex to the nucleus and activate gene expression. Similarly as other STAT family proteins, STAT6 is also activated by growth factors and cytokines. STAT6 is mainly activated by cytokines interleukin-4 and interleukin-13.

<span class="mw-page-title-main">RELA</span> Protein-coding gene in the species Homo sapiens

Transcription factor p65 also known as nuclear factor NF-kappa-B p65 subunit is a protein that in humans is encoded by the RELA gene.

<span class="mw-page-title-main">MAPK7</span> Protein-coding gene in the species Homo sapiens

Mitogen-activated protein kinase 7 also known as MAP kinase 7 is an enzyme that in humans is encoded by the MAPK7 gene.

<span class="mw-page-title-main">TRAF5</span> Protein-coding gene in the species Homo sapiens

TNF receptor-associated factor 5 is a protein that in humans is encoded by the TRAF5 gene.

<span class="mw-page-title-main">STAT5A</span> Protein-coding gene in the species Homo sapiens

Signal transducer and activator of transcription 5A is a protein that in humans is encoded by the STAT5A gene. STAT5A orthologs have been identified in several placentals for which complete genome data are available.

<span class="mw-page-title-main">IRAK1</span> Protein-coding gene in humans

Interleukin-1 receptor-associated kinase 1 (IRAK-1) is an enzyme in humans encoded by the IRAK1 gene. IRAK-1 plays an important role in the regulation of the expression of inflammatory genes by immune cells, such as monocytes and macrophages, which in turn help the immune system in eliminating bacteria, viruses, and other pathogens. IRAK-1 is part of the IRAK family consisting of IRAK-1, IRAK-2, IRAK-3, and IRAK-4, and is activated by inflammatory molecules released by signaling pathways during pathogenic attack. IRAK-1 is classified as a kinase enzyme, which regulates pathways in both innate and adaptive immune systems.

<span class="mw-page-title-main">RPS6KA5</span> Enzyme

Ribosomal protein S6 kinase alpha-5 is an enzyme that in humans is encoded by the RPS6KA5 gene. This kinase, together with RPS6KA4, are thought to mediate the phosphorylation of histone H3, linked to the expression of immediate early genes.

<span class="mw-page-title-main">PTPN2</span> Protein-coding gene in the species Homo sapiens

Tyrosine-protein phosphatase non-receptor type 2 is an enzyme that in humans is encoded by the PTPN2 gene.

<span class="mw-page-title-main">TNK2</span> Protein-coding gene in the species Homo sapiens

Activated CDC42 kinase 1, also known as ACK1, is an enzyme that in humans is encoded by the TNK2 gene. TNK2 gene encodes a non-receptor tyrosine kinase, ACK1, that binds to multiple receptor tyrosine kinases e.g. EGFR, MERTK, AXL, HER2 and insulin receptor (IR). ACK1 also interacts with Cdc42Hs in its GTP-bound form and inhibits both the intrinsic and GTPase-activating protein (GAP)-stimulated GTPase activity of Cdc42Hs. This binding is mediated by a unique sequence of 47 amino acids C-terminal to an SH3 domain. The protein may be involved in a regulatory mechanism that sustains the GTP-bound active form of Cdc42Hs and which is directly linked to a tyrosine phosphorylation signal transduction pathway. Several alternatively spliced transcript variants have been identified from this gene, but the full-length nature of only two transcript variants has been determined.

The Akt signaling pathway or PI3K-Akt signaling pathway is a signal transduction pathway that promotes survival and growth in response to extracellular signals. Key proteins involved are PI3K and Akt.

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000168610 – Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000004040 – Ensembl, May 2017
  3. ↑ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ↑ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
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  6. ↑ Tkach M, Rosemblit C, Rivas MA, Proietti CJ, Díaz Flaqué MC, Mercogliano MF, Beguelin W, Maronna E, Guzmán P, Gercovich FG, Deza EG, Elizalde PV, Schillaci R (April 2013). "p42/p44 MAPK-mediated Stat3Ser727 phosphorylation is required for progestin-induced full activation of Stat3 and breast cancer growth". Endocrine-Related Cancer. 20 (2): 197–212. doi: 10.1530/ERC-12-0194 . hdl: 11336/5548 . PMID   23329648.
  7. ↑ Silva CM (October 2004). "Role of STATs as downstream signal transducers in Src family kinase-mediated tumorigenesis". Oncogene. 23 (48): 8017–23. doi:10.1038/sj.onc.1208159. PMID   15489919. S2CID   9420068.
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  9. ↑ Yuan ZL, Guan YJ, Wang L, Wei W, Kane AB, Chin YE (November 2004). "Central role of the threonine residue within the p+1 loop of receptor tyrosine kinase in STAT3 constitutive phosphorylation in metastatic cancer cells". Molecular and Cellular Biology. 24 (21): 9390–400. doi:10.1128/MCB.24.21.9390-9400.2004. PMC   522220 . PMID   15485908. 15485908.
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  31. 1 2 Yuan ZL, Guan YJ, Wang L, Wei W, Kane AB, Chin YE (November 2004). "Central role of the threonine residue within the p+1 loop of receptor tyrosine kinase in STAT3 constitutive phosphorylation in metastatic cancer cells". Molecular and Cellular Biology. 24 (21): 9390–400. doi:10.1128/MCB.24.21.9390-9400.2004. PMC   522220 . PMID   15485908.
  32. ↑ Olayioye MA, Beuvink I, Horsch K, Daly JM, Hynes NE (June 1999). "ErbB receptor-induced activation of stat transcription factors is mediated by Src tyrosine kinases". The Journal of Biological Chemistry. 274 (24): 17209–18. doi: 10.1074/jbc.274.24.17209 . PMID   10358079.
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  34. 1 2 Spiekermann K, Biethahn S, Wilde S, Hiddemann W, Alves F (August 2001). "Constitutive activation of STAT transcription factors in acute myelogenous leukemia". European Journal of Haematology. 67 (2): 63–71. doi:10.1034/j.1600-0609.2001.t01-1-00385.x. PMID   11722592. S2CID   38074766.
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  41. 1 2 Yu Z, Zhang W, Kone BC (October 2002). "Signal transducers and activators of transcription 3 (STAT3) inhibits transcription of the inducible nitric oxide synthase gene by interacting with nuclear factor kappaB". The Biochemical Journal. 367 (Pt 1): 97–105. doi:10.1042/BJ20020588. PMC   1222853 . PMID   12057007.
  42. ↑ Lerner L, Henriksen MA, Zhang X, Darnell JE (October 2003). "STAT3-dependent enhanceosome assembly and disassembly: synergy with GR for full transcriptional increase of the alpha 2-macroglobulin gene". Genes & Development. 17 (20): 2564–77. doi:10.1101/gad.1135003. PMC   218150 . PMID   14522952.
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  44. ↑ Giraud S, Bienvenu F, Avril S, Gascan H, Heery DM, Coqueret O (March 2002). "Functional interaction of STAT3 transcription factor with the coactivator NcoA/SRC1a". The Journal of Biological Chemistry. 277 (10): 8004–11. doi: 10.1074/jbc.M111486200 . PMID   11773079.
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