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Metabolism | none |
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Formula | C18H21NO5 |
Molar mass | 331.368 g·mol−1 |
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Amikhelline is an antimitotic drug. [1] It acts as a DNA intercalator [2] and inhibits DNA polymerase. [3]
Deoxyribonucleic acid is a polymer composed of two polynucleotide chains that coil around each other to form a double helix. The polymer carries genetic instructions for the development, functioning, growth and reproduction of all known organisms and many viruses. DNA and ribonucleic acid (RNA) are nucleic acids. Alongside proteins, lipids and complex carbohydrates (polysaccharides), nucleic acids are one of the four major types of macromolecules that are essential for all known forms of life.
In biology, the SECIS element is an RNA element around 60 nucleotides in length that adopts a stem-loop structure. This structural motif directs the cell to translate UGA codons as selenocysteines. SECIS elements are thus a fundamental aspect of messenger RNAs encoding selenoproteins, proteins that include one or more selenocysteine residues.
The first isolation of deoxyribonucleic acid (DNA) was done in 1869 by Friedrich Miescher. DNA extraction is the process of isolating DNA from the cells of an organism isolated from a sample, typically a biological sample such as blood, saliva, or tissue. It involves breaking open the cells, removing proteins and other contaminants, and purifying the DNA so that it is free of other cellular components. The purified DNA can then be used for downstream applications such as PCR, sequencing, or cloning. Currently, it is a routine procedure in molecular biology or forensic analyses.
Topoisomerase inhibitors are chemical compounds that block the action of topoisomerases, which are broken into two broad subtypes: type I topoisomerases (TopI) and type II topoisomerases (TopII). Topoisomerase plays important roles in cellular reproduction and DNA organization, as they mediate the cleavage of single and double stranded DNA to relax supercoils, untangle catenanes, and condense chromosomes in eukaryotic cells. Topoisomerase inhibitors influence these essential cellular processes. Some topoisomerase inhibitors prevent topoisomerases from performing DNA strand breaks while others, deemed topoisomerase poisons, associate with topoisomerase-DNA complexes and prevent the re-ligation step of the topoisomerase mechanism. These topoisomerase-DNA-inhibitor complexes are cytotoxic agents, as the un-repaired single- and double stranded DNA breaks they cause can lead to apoptosis and cell death. Because of this ability to induce apoptosis, topoisomerase inhibitors have gained interest as therapeutics against infectious and cancerous cells.
fis is an E. coli gene encoding the Fis protein. The regulation of this gene is more complex than most other genes in the E. coli genome, as Fis is an important protein which regulates expression of other genes. It is supposed that fis is regulated by H-NS, IHF and CRP. It also regulates its own expression (autoregulation). Fis is one of the most abundant DNA binding proteins in Escherichia coli under nutrient-rich growth conditions.
In molecular biology, U71 belongs to the H/ACA class of Small nucleolar RNA (snoRNAs). snoRNAs bind a number of proteins to form snoRNP complexes. This class are thought to guide the sites of modification of uridines to pseudouridines by forming direct base pairing interactions with substrate RNAs. Targets may include ribosomal and spliceosomal RNAs but the exact function of many snoRNAs, including U71, is unclear.
In molecular biology, U23 belongs to the H/ACA class of snoRNAs. snoRNAs bind a number of proteins to form snoRNP complexes. This class are thought to guide the sites of modification of uridines to pseudouridines by forming direct base pairing interactions with substrate RNAs. Targets include ribosomal and spliceosomal RNAs as well as the Trypanosoma spliced leader RNA as possibly other, still unknown cellular RNAs. U23 can direct the pseudouridylation of U97 in human 18S rRNA. U23 is encoded within intron 12 of the nucleolin gene in human, mouse, rat chicken, and Xenopus laevis.
Interferon regulatory factor 2 is a protein that in humans is encoded by the IRF2 gene.
Interferon regulatory factor 1 is a protein that in humans is encoded by the IRF1 gene.
40S ribosomal protein S3 is a protein that in humans is encoded by the RPS3 gene.
Alpha-(1,3)-fucosyltransferase is an enzyme that in humans is encoded by the FUT6 gene.
RhoH is a small signaling G protein, and is a member of the Rac subfamily of the family Rho family of GTPases. It is encoded by the gene RHOH.
Proprotein convertase subtilisin/kexin type 4 is an enzyme that in humans is encoded by the PCSK4 gene.
GBA2 is the gene that encodes the enzyme non-lysosomal glucosylceramidase in humans. It has glucosylceramidase activity.
Brain acid soluble protein 1 is a protein that in humans is encoded by the BASP1 gene.
The enzyme Triacylglycerol lipase (also Triglyceride lipase, EC 3.1.1.3;systematic name triacylglycerol acylhydrolase) catalyses the hydrolysis of ester linkages of triglycerides:
Coccolysin is an enzyme. This enzyme catalyses the following chemical reaction
DNA polymerase alpha catalytic subunit is an enzyme that in humans is encoded by the POLA1 gene.
The tyrT operon is a series of genes encoding the tRNA for tyrosine in Escherichia coli. It is activated in response to amino acid starvation.
Philippa Marion Wiggins was a New Zealand academic, who made significant contributions to the understanding of the structure of water in living cells.