These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Structure and phosphorylation of the Fujinami sarcoma virus gene product.
    Author: Pawson T, Kung TH, Martin GS.
    Journal: J Virol; 1981 Dec; 40(3):665-72. PubMed ID: 6275111.
    Abstract:
    The Fujinami avian sarcoma virus (FSV) transforming gene product, P140, is a fusion protein which contains both gag-related and FSV-specific methionine-containing tryptic peptides. The virion protease p15 cleaved p140 into two fragments: an N-terminal 33K fragment which contained all but one of the gag-related tryptic peptides and a C-terminal 120K fragment which contained all of the FSV-specific tryptic peptides. The 33K gag-related fragment from P140 phosphorylated in FSV-transformed cells contained only phosphoserine, whereas the 120K C-terminal FSV-specific fragments contained both phosphoserine and phosphotyrosine. P140 isolated from cells infected at the nonpermissive temperature with an isolate of FSV which is temperature sensitive for transformation had a normally phosphorylated 33K fragment, but a hypophosphorylated 120K fragment deficient in both phosphotyrosine and phosphoserine. When P140 was immunoprecipitated from cells and phosphorylated in vitro at tyrosine residues in the immune complex kinase reaction, only the FSV-specific fragment was labeled. These data define the structure of FSV P140 and locate the phosphorylated amino acids within the two regions of the polypeptide.
    [Abstract] [Full Text] [Related] [New Search]