Proteolytic cleavage of the beta1 subunit of platelet alpha2beta1 integrin by the metalloproteinase jararhagin compromises collagen-stimulated phosphorylation of pp72.
AuthorsKamiguti AS, Markland FS, Zhou Q, Laing GD, Theakston RD, Zuzel M,
JournalJ Biol Chem
PubMed ID9405475
Early signaling events in the stimulation of platelets by collagen include the tyrosine phosphorylations of FcR gamma-chain, pp72(syk) and phospholipase Cgamma2. These events are dependent on the main platelet collagen receptor, alpha2beta1 integrin (glycoprotein Ia-IIa complex). We recently found that jararhagin, a 52-kDa snake venom metalloproteinase, selectively inhibits collagen-induced platelet ... More