PCMT1 Proteins

Protein Information

Three classes of protein carboxyl methyltransferases, distinguished by their methyl-acceptor substrate specificity, have been found in prokaryotic and eukaryotic cells. The type II enzyme catalyzes the transfer of a methyl group from S-adenosyl-L-methionine to the free carboxyl groups of D-aspartyl and L-isoaspartyl residues. These methyl-accepting residues result from the spontaneous deamidation, isomerization, and racemization of normal L-aspartyl and L-asparaginyl residues and represent sites of covalent damage to aging proteins PCMT1 (EC 2.1.1.77) is a protein repair enzyme that initiates the conversion of abnormal D-aspartyl and L-isoaspartyl residues to the normal L-aspartyl form.

Synonyms

C79501; L-isoaspartyl protein carboxyl methyltransferase; PCM; Pcmt1; PIMT; protein carboxyl methyltransferase; protein L-isoaspartyl/D-aspartyl methyltransferase; Protein-beta-aspartate methyltransferase; protein-L-isoaspartate (D-aspartate) O-methyltransferase; protein-L-isoaspartate (D-aspartate) O-methyltransferase 1; protein-L-isoaspartate(D-aspartate) O-methyltransferase