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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
3
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pubmed:dateCreated |
1991-4-15
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pubmed:abstractText |
The nearly conserved glycine-30 in porcine pancreatic phospholipase A2 has been replaced by serine. The resulting mutant G30S was expressed in Escherichia coli, purified and characterized. The mutation caused a significant drop in enzymatic activity towards monomeric and aggregated substrates, but had a limited effect on substrate binding. In contrast the affinity for calcium ions, the essential cofactor, was reduced 10-fold. The reduced enzymatic activity is attributed to a reduced stabilization of the transition state. The results are discussed in view of naturally occurring inactive phospholipase A2 homologues from snake venom.
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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
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pubmed:month |
Feb
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pubmed:issn |
0006-3002
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:day |
15
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pubmed:volume |
1076
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
374-8
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pubmed:dateRevised |
2007-11-15
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pubmed:meshHeading |
pubmed-meshheading:2001385-Animals,
pubmed-meshheading:2001385-Base Sequence,
pubmed-meshheading:2001385-Binding Sites,
pubmed-meshheading:2001385-Glycine,
pubmed-meshheading:2001385-Kinetics,
pubmed-meshheading:2001385-Molecular Sequence Data,
pubmed-meshheading:2001385-Mutagenesis, Site-Directed,
pubmed-meshheading:2001385-Oligonucleotide Probes,
pubmed-meshheading:2001385-Pancreas,
pubmed-meshheading:2001385-Phospholipases A,
pubmed-meshheading:2001385-Phospholipases A2,
pubmed-meshheading:2001385-Restriction Mapping,
pubmed-meshheading:2001385-Substrate Specificity,
pubmed-meshheading:2001385-Swine
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pubmed:year |
1991
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pubmed:articleTitle |
The importance of glycine-30 for enzymatic activity of phospholipase A2.
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pubmed:affiliation |
Department of Enzymology and Protein Engineering, University of Utrecht, CBLE, University Centre De Uithof, The Netherlands.
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pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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