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Protein O-GlcNAc transferase also known as OGT or O-linked N-acetylglucosaminyltransferase is an enzyme (EC 2.4.1.255) that in humans is encoded by the OGT gene. [ 5 ] [ 6 ] OGT catalyzes the addition of the O -GlcNAc post-translational modification to proteins .
Two conserved enzymes control this glycosylation of serine and threonine: O-GlcNAc transferase (OGT) and O-GlcNAcase (OGA). While OGT catalyzes the addition of O-GlcNAc to serine and threonine, OGA catalyzes the hydrolytic cleavage of O-GlcNAc from post-transitionally modified proteins. [14] OGA is a member of the family of hexosaminidases ...
O-GlcNAc (short for O-linked GlcNAc or O-linked β-N-acetylglucosamine) is a reversible enzymatic post-translational modification that is found on serine and threonine residues of nucleo cytoplasmic proteins. The modification is characterized by a β-glycosidic bond between the hydroxyl group of serine or threonine side chains and N ...
Methylated-DNA-protein-cysteine methyltransferase. Methylated-DNA--protein-cysteine methyltransferase (MGMT), also known as O6-alkylguanine DNA alkyltransferase AGT, is a protein that in humans is encoded by the MGMT gene. [5][6] MGMT is crucial for genome stability. It repairs the naturally occurring mutagenic DNA lesion O 6 -methylguanine ...
AGT II. O6-alkylguanine DNA alkyltransferase II ( O6 AGT II) previously known as O6 Guanine transferase (ogt) is a bacterial protein that is involved in DNA repair together with Ada ( also known as O6 AGT I). [1]
Perilipin-1. Perilipin, also known as lipid droplet-associated protein, perilipin 1, or PLIN, is a protein that, in humans, is encoded by the PLIN gene. [5] The perilipins are a family of proteins that associate with the surface of lipid droplets. Phosphorylation of perilipin is essential for the mobilization of fats in adipose tissue.
Function. Glucuronosyltransferases are responsible for the process of glucuronidation, a major part of phase II metabolism. Arguably the most important of the Phase II (conjugative) enzymes, UGTs have been the subject of increasing scientific inquiry since the mid-to-late 1990s. The reaction catalyzed by the UGT enzyme involves the addition of ...
TET enzymes. The TET enzymes are a family of ten-eleven translocation (TET) methylcytosine dioxygenases. They are instrumental in DNA demethylation. 5-Methylcytosine (see first Figure) is a methylated form of the DNA base cytosine (C) that often regulates gene transcription and has several other functions in the genome. [1]