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rdf:type |
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lifeskim:mentions |
|
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pubmed:issue |
4
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pubmed:dateCreated |
1991-5-21
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pubmed:abstractText |
A series of N2-substituted guanosine 5'-triphosphates was synthesized from the corresponding nucleosides. The nucleosides were prepared by treatment of N2-substituted guanines with tetra-O-acetylribose under conditions which maximized the yield of the 9-beta-guanosine isomers. These nucleotides and several sugar- and base-modified analogues of GTP were tested for their ability to bind to cellular and oncogenic forms of the GTP/GDP binding proteins, Ha-ras-p21. Several N2-substituted GTPs showed affinities higher than that of GDP itself, and the N2-[p-(n-butyl)phenyl] derivative bound to the oncogenic mutant, Leu-61 p21, twice as strongly as to the cellular protein. Changes in relative affinities of the nucleotides are discussed with reference to reported crystallographic structures of p21.
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pubmed:grant |
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pubmed:language |
eng
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pubmed:journal |
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|
pubmed:citationSubset |
IM
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pubmed:chemical |
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|
pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
0022-2623
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pubmed:author |
|
|
pubmed:issnType |
Print
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pubmed:volume |
34
|
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pubmed:owner |
NLM
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|
pubmed:authorsComplete |
Y
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pubmed:pagination |
1302-7
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|
pubmed:dateRevised |
2007-11-14
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pubmed:meshHeading |
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pubmed:year |
1991
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pubmed:articleTitle |
Interaction of GTP derivatives with cellular and oncogenic ras-p21 proteins.
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pubmed:affiliation |
Department of Pharmacology, University of Massachusetts Medical School, Worcester 01655.
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|
pubmed:publicationType |
Journal Article,
Comparative Study,
Research Support, U.S. Gov't, P.H.S.
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