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Adaptor ADAP (adhesion- and degranulation-promoting adaptor protein) regulates beta1 integrin clustering on mast cells.

Abstract：

:Aggregation of the high-affinity IgE receptor (FcepsilonRI) activates a tyrosine phosphorylation cascade needed for enhanced adhesion and degranulation events on mast cells. We previously identified the adaptor ADAP (otherwise known as FYB/SLAP) as a modulator of integrin-mediated adhesion of T-cells and mast cells. However, the molecular basis for the effect on beta1 integrin adhesion on mast cells was unclear. In this study, we demonstrate that ADAP can promote the kinetics of beta1 integrin clustering on mast cells. By contrast, the clustering of the FcepsilonRI receptor was unaffected by transfected ADAP, indicating that the promoting effect on clustering was selective for beta1 integrins. These findings extend the modulatory effect of ADAP from beta2 to beta1 members of the integrin family, and provide a molecular basis for the modulatory effect of ADAP on mast cell adhesion.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Geng L,Rudd C

doi

10.1006/bbrc.2001.6117

subject

Has Abstract

pub_date

2001-12-21 00:00:00

pages

1135-40

issue

5

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(01)96117-0

journal_volume

289

pub_type

杂志文章

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