ITAM &TYROSINE KINASE SIGNALLING ASSEMBLIES

$19,396P41FY2000RRNIH

University Of Calif-Los Alamos Nat Lab, Los Alamos NM

Investigators

Linked publications & trials

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Abstract

Signaling through multisubunit immune receptors is regulated through intracellular tyrosine kinases. These pathways require macromolecular assemblies involving intracellular tyrosine activation motifs (ITAMs) on the receptors and kinases such as syk and fgr. This project aims at examining the order of assembly, the affinities and kinetics of the molecular steps in cell activation. A complete description is provided in the collaborative projects of the Year 16-20 NFCR renewal. In brief, ITAM or kinase reagents are being displayed on beads through avidin-biotin or GS-GST linkages. The second components are fluorescently labeled and conventional as well as rapid mix flow cytometry will be used to detect and analyze the binding interactions. We have succeeded in displaying phosphoryated ITAMs on beads and detecting them with anti-phosphotyrosine antibodies.

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