Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6388
pubmed:dateCreated
1992-9-9
pubmed:abstractText
Stimulation of certain receptor tyrosine kinases results in the tyrosine phosphorylation and activation of phospholipase C gamma (PLC gamma), an enzyme that catalyses the hydrolysis of phosphatidylinositol (PtdIns). This hydrolysis generates diacylglycerol and free inositol phosphate, which in turn activate protein kinase C and increase intracellular Ca2+, respectively. PLC gamma physically associates with activated receptor tyrosine kinases, suggesting that it is a substrate for direct phosphorylation by these kinases. Here we report that a fibroblast growth factor (FGF) receptor with a single point mutation at residue 766 replacing tyrosine with phenylalanine fails to associate with PLC gamma in response to FGF. This mutant receptor also failed to mediate PtdIns hydrolysis and Ca2+ mobilization after FGF stimulation. However, the mutant receptor phosphorylated itself and several other cellular proteins, and it mediated mitogenesis in response to FGF. These findings show that a point mutation in the FGF receptor selectively eliminates activation of PLC gamma and that neither Ca2+ mobilization nor PtdIns hydrolysis are required for FGF-induced mitogenesis.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0028-0836
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
358
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
678-81
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:1379697-Amino Acid Sequence, pubmed-meshheading:1379697-Animals, pubmed-meshheading:1379697-Base Sequence, pubmed-meshheading:1379697-Calcium, pubmed-meshheading:1379697-Fibroblast Growth Factors, pubmed-meshheading:1379697-Mitosis, pubmed-meshheading:1379697-Molecular Sequence Data, pubmed-meshheading:1379697-Mutagenesis, Site-Directed, pubmed-meshheading:1379697-Mutation, pubmed-meshheading:1379697-Oligodeoxyribonucleotides, pubmed-meshheading:1379697-Peptides, pubmed-meshheading:1379697-Phosphatidylinositols, pubmed-meshheading:1379697-Phosphorylation, pubmed-meshheading:1379697-Phosphotyrosine, pubmed-meshheading:1379697-Protein-Tyrosine Kinases, pubmed-meshheading:1379697-Rats, pubmed-meshheading:1379697-Receptors, Cell Surface, pubmed-meshheading:1379697-Receptors, Fibroblast Growth Factor, pubmed-meshheading:1379697-Signal Transduction, pubmed-meshheading:1379697-Structure-Activity Relationship, pubmed-meshheading:1379697-Transfection, pubmed-meshheading:1379697-Type C Phospholipases, pubmed-meshheading:1379697-Tyrosine
pubmed:year
1992
pubmed:articleTitle
Point mutation of an FGF receptor abolishes phosphatidylinositol turnover and Ca2+ flux but not mitogenesis.
pubmed:affiliation
Program of Excellence in Molecular Biology, University of California, San Francisco 94143-0724.
pubmed:publicationType
Journal Article, In Vitro