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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
8
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pubmed:dateCreated |
1984-10-19
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pubmed:abstractText |
Galactosyltransferase from bovine milk was inactivated by a series of sulfhydryl group specific reagents of different structures and sizes. The inactivation rate constants suggest that the thiol is located in a nonpolar microenvironment. The ESR spectrum of a spin labeled galactosyltransferase showed that the sulfhydryl group is in a region of non-restricted rotation, consistent with its broad reactivity towards various thiol reagents. Galactosyltransferase immobilized onto agarose through its sulfhydryl group retained its ability to catalyze the synthesis of N-acetyllactosamine and lactose. Thus the residual activity of the sulfhydryl group modified enzyme is not due to an isozyme lacking such a group. In addition, the active thiol can not be located at the active site nor the protein-protein interaction site between galactosyltransferase and alpha-lactalbumin.
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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:issn |
0020-711X
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pubmed:author | |
pubmed:issnType |
Print
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pubmed:volume |
16
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
913-7
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pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
pubmed-meshheading:6088322-Animals,
pubmed-meshheading:6088322-Binding Sites,
pubmed-meshheading:6088322-Cattle,
pubmed-meshheading:6088322-Electron Spin Resonance Spectroscopy,
pubmed-meshheading:6088322-Female,
pubmed-meshheading:6088322-Kinetics,
pubmed-meshheading:6088322-Lactose Synthase,
pubmed-meshheading:6088322-Milk,
pubmed-meshheading:6088322-Protein Binding,
pubmed-meshheading:6088322-Structure-Activity Relationship,
pubmed-meshheading:6088322-Sulfhydryl Reagents
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pubmed:year |
1984
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pubmed:articleTitle |
The sulfhydryl group microenvironment of lactose synthase from bovine milk.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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