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75387 Ensembl ENSG00000089163 ENSMUSG00000029524 UniProt Q9Y6E7 Q8R216 RefSeq (mRNA) NM_012240 NM_001385733 NM_001385734 NM_001385735 NM_001167691 NM_133760 RefSeq (protein) NP_036372 NP_001161163 NP_598521 Location (UCSC) Chr 12: 120.3 – 120.31 Mb Chr 5: 115.48 – 115.48 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Sirtuin 4, also known as SIRT4, is a mitochondrial protein ...
[2] [3] They are ancient in animal evolution and appear to possess a highly conserved structure throughout all kingdoms of life. [2] Chemically, sirtuins are a class of proteins that possess either mono- ADP-ribosyltransferase or deacylase activity, including deacetylase, desuccinylase , demalonylase , demyristoylase and depalmitoylase activity.
There are usually 2 alpha subunits and 3 other beta, gamma, or delta subunits (some consist of 5 alpha subunits). The name of the family refers to a characteristic loop formed by 13 highly conserved amino acids between two cysteine (Cys) residues, which form a disulfide bond [1] near the N-terminal extracellular domain.
A conservative replacement (also called a conservative mutation or a conservative substitution or a homologous replacement) is an amino acid replacement in a protein that changes a given amino acid to a different amino acid with similar biochemical properties (e.g. charge, hydrophobicity and size). [1] [2]
Amino acids with the structure NH + 3 −CXY−CXY−CO − 2, such as β-alanine, a component of carnosine and a few other peptides, are β-amino acids. Ones with the structure NH + 3 −CXY−CXY−CXY−CO − 2 are γ-amino acids, and so on, where X and Y are two substituents (one of which is normally H). [7]
Serine (symbol Ser or S) [3] [4] is an α-amino acid that is used in the biosynthesis of proteins. It contains an α-amino group (which is in the protonated − NH +3 form under biological conditions), a carboxyl group (which is in the deprotonated − COO −
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Apamin selectively blocks SK channels, a type of Ca 2+-activated K + channel expressed in the central nervous system. Toxicity is caused by only a few amino acids, in particular cysteine 1, lysine 4, arginine 13, arginine 14 and histidine 18. These amino acids are involved in the binding of apamin to the Ca 2+-activated K + channel.