Linked Life Data

454714

Source:http://linkedlifedata.com/resource/pubmed/id/454714

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
1979-9-27
pubmed:abstractText
Biosynthesis of mevalonic acid (MVA), total formation of 14CO2 from [1,3-14C]malonyl-CoA and the activity of malonyl-CoA decarboxylase in subcellular fractions of rat liver were studied. The dependence of the rate of MVA biosynthesis on malonyl-CoA concentration was found to be linear both in 140,000 g supernatant and solubilized microsomal fractions. It was shown that in a composite system (140,000 g supernatant fraction added to washed microsomes, 10 : 1) the optimal concentration ratio for the substrates of MVA biosynthesis (malonyl-CoA and acetyl-CoA) is 1 to 2. In the absence of acetyl-CoA decarboxylation of [1,3-14C]malonyl-CoA was prevalent. In all subcellular fractions studied decarboxylation of [1,3-14C]malonyl-CoA prevailed over its incorporation into MVA, total non-saponified lipid fraction and fatty acids. The degree of malonyl-CoA, decarboxylation was not correlated with the rate of its incorporation into MVA, i. e. the increase in the 14CO2 formation was not accompanied by stimulation of [1,3-14C]malonyl-CoA incorporation either into MVA or into total non-saponified lipid fractions. The incorporation of [1-14C]acetyl-CoA into MVA under the same conditions was considerably lower than that of [1,3-14C]malonyl-CoA. In all subcellular fractions under study the activity of malonyl-CoA decarboxylase was found. The experimental data suggest that a remarkable part of malonyl-CoA is incorporated into MVA without preliminary decarboxylation. A possible role of malonyl-CoA decarboxylase as an enzyme which protects the cell against accumulation of malonyl-CoA and its immediate metabolites -- malonate and methylmalonyl-CoA is disucssed.
pubmed:language
rus
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
May
pubmed:issn
0320-9725
pubmed:author
pubmed:issnType
Print
pubmed:volume
44
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
851-63
pubmed:dateRevised
2007-7-23
pubmed:meshHeading
pubmed:year
1979
pubmed:articleTitle
[Decarboxylation of malonyl-CoA and biosynthesis of mevalonic acid in rat liver].
pubmed:publicationType
Journal Article, English Abstract