Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1990-2-22
pubmed:abstractText
Human T cells can be activated and induced to proliferate through either the antigen-specific receptor complex (TcR-CD3) or the CD2 surface molecule. Following stimulation, both serine and tyrosine phosphorylation of cellular protein have been demonstrated to occur. p56lck, a protein tyrosine kinase associated to the inner face of the plasma membrane, is almost exclusively expressed in lymphoid cells, especially T cells. Within minutes after activation of a human T cell-derived line (Jurkat) via stimulation of either the TcR-CD3 complex or the CD2 glycoprotein, we observed a hyperphorphosylation of p56lck. A concomitant shift to a higher molecular weight in sodium dodecyl sulfate-polyacrylamide gel was also observed. Similar changes were obtained with phorbol 12-myristate 13-acetate. Tryptic phosphopeptide analysis of the hyperphosphorylated form of p56lck yielded new phosphorylated sites in serine residues and an increased tyrosine phosphorylation. These results suggest that p56lck may be intimately connected to the signaling pathway in T cell activation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0014-2980
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2183-9
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed-meshheading:2481585-Antigens, CD2, pubmed-meshheading:2481585-Antigens, Differentiation, T-Lymphocyte, pubmed-meshheading:2481585-Blotting, Western, pubmed-meshheading:2481585-Humans, pubmed-meshheading:2481585-Lymphocyte Activation, pubmed-meshheading:2481585-Lymphocyte Specific Protein Tyrosine Kinase p56(lck), pubmed-meshheading:2481585-Molecular Weight, pubmed-meshheading:2481585-Peptide Fragments, pubmed-meshheading:2481585-Phosphorylation, pubmed-meshheading:2481585-Phosphoserine, pubmed-meshheading:2481585-Phosphotyrosine, pubmed-meshheading:2481585-Protein-Tyrosine Kinases, pubmed-meshheading:2481585-Receptors, Antigen, T-Cell, pubmed-meshheading:2481585-Receptors, Immunologic, pubmed-meshheading:2481585-T-Lymphocytes, pubmed-meshheading:2481585-Time Factors, pubmed-meshheading:2481585-Tyrosine
pubmed:year
1989
pubmed:articleTitle
The lymphocyte-specific protein tyrosine kinase p56lck is hyperphosphorylated on serine and tyrosine residues within minutes after activation via T cell receptor or CD2.
pubmed:affiliation
Unité 15, Institut National de la Santé et de la Recherche Médicale Paris, France.
pubmed:publicationType
Journal Article, In Vitro, Research Support, Non-U.S. Gov't