Linked Life Data

10496981

Source:http://linkedlifedata.com/resource/pubmed/id/10496981

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1999-11-8
pubmed:abstractText
Malonate decarboxylases, which catalyze the conversion of malonate to acetate, can be classified into biotin-dependent and biotin-independent enzymes. In order to reveal the stereochemical course of the reactions catalyzed by the biotin-independent enzymes from Acinetobacter calcoaceticus and Pseudomonas fluorescens, a chiral substrate, malonate carrying (13)C in one carboxyl group and (3)H at one of the methylene positions, was prepared and used in the reactions catalyzed by these two enzymes. The decarboxylation of (R)-[1-(13)C(1), 2-(3)H]malonate in (2)H(2)O gave a pseudo-racemate of chiral acetate which was converted via acetyl-CoA into malate with malate synthase. From the relative proportions of the isotopomers of malate present, determined by (3)H NMR analysis, it was concluded that in the decarboxylation of malonate by these two biotin-independent enzymes COOH is replaced by H with retention of configuration. The same stereochemical outcome had been previously observed for the reaction catalyzed by the biotin-dependent malonate decarboxylase from Malonomonas rubra (J. Micklefield et al. J. Am. Chem. Soc. 117, 1153-1154, 1995).
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0003-9861
pubmed:author
pubmed:copyrightInfo
Copyright 1999 Academic Press.
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
370
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
93-6
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Stereochemical course of biotin-independent malonate decarboxylase catalysis.
pubmed:affiliation
Department of Chemistry, University of Washington, Seattle, Washington, 98195, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't