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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
1
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pubmed:dateCreated |
1993-9-28
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pubmed:abstractText |
The role of Cys-138 in the catalysis of the skeletal muscle 6-phosphofructo-2-kinase reaction was investigated by mutating this residue to serine, glutamine and alanine, expressing the mutants in E. coli with a T7 RNA polymerase-based expression system, and analyzing their kinetic properties. The Cys138Ala mutant had greatly diminished activity, while the Cys138Ser and Cys138Gln mutants had maximal velocities 2-3 fold higher than the wild-type enzyme. It was concluded that Cys-138 does not act as a base catalyst in the kinase reaction, but that it plays a significant structural role in the enzyme's active site.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Aug
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pubmed:issn |
0006-291X
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
31
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pubmed:volume |
195
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
229-36
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:8363605-Amino Acid Sequence,
pubmed-meshheading:8363605-Animals,
pubmed-meshheading:8363605-Base Sequence,
pubmed-meshheading:8363605-Cloning, Molecular,
pubmed-meshheading:8363605-Cysteine,
pubmed-meshheading:8363605-Escherichia coli,
pubmed-meshheading:8363605-Kinetics,
pubmed-meshheading:8363605-Molecular Sequence Data,
pubmed-meshheading:8363605-Muscles,
pubmed-meshheading:8363605-Mutagenesis, Site-Directed,
pubmed-meshheading:8363605-Oligodeoxyribonucleotides,
pubmed-meshheading:8363605-Phosphofructokinase-1,
pubmed-meshheading:8363605-Point Mutation,
pubmed-meshheading:8363605-Polymerase Chain Reaction,
pubmed-meshheading:8363605-Recombinant Proteins
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pubmed:year |
1993
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pubmed:articleTitle |
Lack of evidence for a role of Cys-138 as a base catalyst in the skeletal muscle 6-phosphofructo-2-kinase reaction.
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pubmed:affiliation |
Department of Physiology and Biophysics, State University of New York, Stony Brook 11794-8661.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.,
Research Support, U.S. Gov't, Non-P.H.S.,
Research Support, Non-U.S. Gov't
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