Linked Life Data

1534981

Source:http://linkedlifedata.com/resource/pubmed/id/1534981

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1992-7-14
pubmed:abstractText
To clarify the requirement of the association of substrate proteins with phospholipid membranes for phosphorylation by protein kinase C (PKC), we studied the relationship between membrane association of PKC-substrate proteins and their phosphorylation by PKC. In the presence of phosphatidylserine, 12-O-tetradecanoylphorbol-13-acetate induced PKC autophosphorylation in either the presence or the absence of Ca2+, and this phosphorylation was not inhibited by increasing salt concentration (up to 200 mM NaCl). Thus, Ca2+ and ionic strength did not markedly affect the enzymatic activity of PKC. Annexin I required Ca2+ for both its association with phospholipid membranes and phosphorylation by PKC, whereas histone and monomyristilated lysozyme (C14:0-lysozyme) did not. This result indicates that the membrane association of substrates closely correlates with their phosphorylation by PKC. Similar correlation was also observed in the effects of ionic strength on the membrane association of the substrates and their phosphorylation by PKC; increased ionic strength (200 mM NaCl) remarkably inhibited both the membrane association and the phosphorylation of histone and annexin I by PKC but C14:0-lysozyme was not markedly affected. These results suggest that the membrane association of PKC-substrate proteins is a prerequisite for their phosphorylation by PKC. This concept further conforms to the mechanisms of PKC inhibitors; some types of PKC inhibitors are mediated all or in part through inhibition of the substrate-membrane interaction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0003-9861
pubmed:author
pubmed:issnType
Print
pubmed:volume
296
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
296-301
pubmed:dateRevised
2007-11-15
pubmed:meshHeading
pubmed:year
1992
pubmed:articleTitle
Requirement of protein association with membranes for phosphorylation by protein kinase C.
pubmed:affiliation
Institute for Laboratory Animals, Kochi Medical School, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't