rdf:type |
|
lifeskim:mentions |
|
pubmed:issue |
2
|
pubmed:dateCreated |
1987-11-18
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pubmed:abstractText |
In the liver vitamin K epoxide, which is produced during the posttranslational carboxylation of protein-bound glutamic acid residues, is recycled by the action of one or more dithiol-dependent reductases. In vitro synthetic dithiols may serve as a cofactor for these enzymes, but the physiological reductant has not yet been found. In this paper we report that in vitro the commercially available thioredoxin/thioredoxin reductase from E. coli can replace the synthetic dithiols during the various reactions of the vitamin K cycle. Based on the assumption that in vivo thioredoxin also plays a role in the regeneration of vitamin K hydroquinone from the epoxide, an extension of the generally accepted vitamin K cycle is proposed.
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pubmed:language |
eng
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pubmed:journal |
|
pubmed:citationSubset |
IM
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pubmed:chemical |
|
pubmed:status |
MEDLINE
|
pubmed:month |
Oct
|
pubmed:issn |
0014-5793
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pubmed:author |
|
pubmed:issnType |
Print
|
pubmed:day |
5
|
pubmed:volume |
222
|
pubmed:owner |
NLM
|
pubmed:authorsComplete |
Y
|
pubmed:pagination |
353-7
|
pubmed:dateRevised |
2007-11-15
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pubmed:meshHeading |
pubmed-meshheading:3308517-Animals,
pubmed-meshheading:3308517-Bacterial Proteins,
pubmed-meshheading:3308517-Carbon-Carbon Ligases,
pubmed-meshheading:3308517-Cattle,
pubmed-meshheading:3308517-Escherichia coli,
pubmed-meshheading:3308517-Ligases,
pubmed-meshheading:3308517-Liver,
pubmed-meshheading:3308517-Oxidation-Reduction,
pubmed-meshheading:3308517-Thioredoxin-Disulfide Reductase,
pubmed-meshheading:3308517-Thioredoxins,
pubmed-meshheading:3308517-Vitamin K
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pubmed:year |
1987
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pubmed:articleTitle |
Vitamin K-dependent carboxylase. Possible role for thioredoxin in the reduction of vitamin K metabolites in liver.
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pubmed:affiliation |
Department of Biochemistry, University of Limburg, Maastricht, The Netherlands.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
|