Linked Life Data

6331892

Source:http://linkedlifedata.com/resource/pubmed/id/6331892

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1984-10-17
pubmed:abstractText
The guinea pig T lymphocyte, known to interact with other cells via direct cell-to-cell contact, exhibits endogenous surface kinase activity as reflected by the appearance of four major labeled bands in autoradiographs of dried sodium dodecyl sulfate (NaDoSO4)-polyacrylamide gel electrophoresis gels when intact cells are briefly exposed to micromolar concentrations of [gamma-32P]ATP followed immediately by solubilization with NaDoSO4 to terminate the reaction. This pattern differs from the labeling of intracellular components which is seen when intact cells are incubated with 32PO4 to generate intracellular [gamma-32P]ATP when only two major labeled bands of protein with different molecular weights are seen. Of a number of modulators of lymphocyte function tested, cyclic GMP and phytohemagglutinin (PHA) caused additional bands to appear in cells exposed to [gamma-32P]ATP. The labeling of added casein was catalyzed by intact cells harvested 4 weeks after injection of animals with Freund's complete adjuvant but not earlier. These findings indicate that plasma membrane kinase activity of guinea pig T lymphocytes is accessible to the extracellular environs (ectokinase activity) and to endogenous surface substrates and that the limitation for such reactions is the availability of ATP in the extracellular component. In view of the number of circumstances under which ATP could appear outside of cells for brief periods of time, these reactions could well take place in vivo.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0008-8749
pubmed:author
pubmed:issnType
Print
pubmed:volume
87
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
319-26
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Endogenous surface phosphorylation reactions and ectokinase activity in the guinea pig T lymphocyte.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, U.S. Gov't, Non-P.H.S.