title: Peptide enzymatic microsynthesis, using carboxypeptidase Y as the catalyst: application to stepwise synthesis of Leuenkephalin.
abstract: In order to develop the use of carboxypeptidase Y (CPD-Y, EC 3.4.12.1) as a catalyst for radioactive hormonal synthesis, the stepwise synthesis of a pentapeptide, Leu-enkephalin, was studied on a microscale. Each peptide bond was formed by enzymatic catalysis, using microquantities of the precursors (amino acid or peptide esters as acyl-components and amino acid ester or amide as nucleophiles). The high condensation yields obtained suggests that CPD-Y can be a useful tool for preparation of radioactive hormonal peptides.
mesh_terms: D002268:Carboxypeptidases / Q000378:metabolism*; D002384:Catalysis; D043402:Cathepsin A; D004743:Enkephalin, Leucine / Q000096:biosynthesis*; D010452:Peptide Biosynthesis; D012441:Saccharomyces cerevisiae / Q000201:enzymology; D029701:Saccharomyces cerevisiae Proteins
chemical_list: D029701:Saccharomyces cerevisiae Proteins; D004743:Enkephalin, Leucine; D002268:Carboxypeptidases; D043402:Cathepsin A; C499283:PRC1 protein, S cerevisiae; C022633:serine carboxypeptidase