#transglutaminase
Transglutaminase
Class of enzymes capable of forming isopeptide bonds in certain regions of proteins
Transglutaminases are enzymes that in nature primarily catalyze the formation of an isopeptide bond between γ-carboxamide groups ( -(C=O)NH2 ) of glutamine residue side chains and the ε-amino groups ( -NH2 ) of lysine residue side chains with subsequent release of ammonia ( NH3 ). Lysine and glutamine residues must be bound to a peptide or a protein so that this cross-linking (between separate molecules) or intramolecular (within the same molecule) reaction can happen. Bonds formed by transglutaminase exhibit high resistance to proteolytic degradation (proteolysis). The reaction isGln-(C=O)NH2 + NH2-Lys → Gln-(C=O)NH-Lys + NH3
Sun 11th
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