Mutant huntingtin replaces Gab1 and interacts with C-terminal SH3 domain of growth factor receptor binding protein 2 (Grb2).

Abstract:

:Huntington's disease (HD) is caused due to expansion of CAG repeats in the gene huntingtin (Htt). Adaptor protein Grb2, involved in Ras-MAP kinase pathway, is a known interactor of Htt. Mutant Htt-Grb2 interaction reduces Ras-MAPK signaling in HD models. In normal cells Grb2 forms Grb2-Sos1-Gab1 complex through its N-SH3 and C-SH3 domains respectively, essential for sustained activation of Ras. We found that C-SH3 of Grb2 mediates the interaction with mutant Htt and this interaction being stronger could replace Gab1, with mutant Htt becoming the preferred partner. This would have immense effect on downstream signaling events.

journal_name

Neurosci Res

journal_title

Neuroscience research

authors

Baksi S,Basu S,Mukhopadhyay D

doi

10.1016/j.neures.2014.06.009

subject

Has Abstract

pub_date

2014-10-01 00:00:00

pages

77-83

eissn

0168-0102

issn

1872-8111

pii

S0168-0102(14)00120-5

journal_volume

87

pub_type

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