Regulation of stress granule dynamics by Grb7 and FAK signalling pathway.

Details

Serval ID
serval:BIB_494A8AA751D5
Type
Article: article from journal or magazin.
Collection
Publications
Title
Regulation of stress granule dynamics by Grb7 and FAK signalling pathway.
Journal
The EMBO journal
Author(s)
Tsai N.P., Ho P.C., Wei L.N.
ISSN
1460-2075 (Electronic)
ISSN-L
0261-4189
Publication state
Published
Issued date
05/03/2008
Peer-reviewed
Oui
Volume
27
Number
5
Pages
715-726
Language
english
Notes
Publication types: Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov't
Publication Status: ppublish
Abstract
Cells form stress granules (SGs) in response to environmental stresses, which constitute cytoplasmic domains where mRNAs are stored and translation is halted. Although several components are found in SGs, it is poorly understood as to how SGs are formed and dissolved. We identified growth factor receptor-bound protein 7 (Grb7), an RNA-binding, translational regulator, as an integral component of SGs, which directly interacts with Hu antigen R (HuR) and is required for cells to form SGs. When stress is terminated, Grb7 is hyperphosphorylated by focal adhesion kinase (FAK), loses its ability to directly interact with HuR and is dissociated from SG components, thereby disrupting SGs in recovering cells. Consistently, dominant-negative hypophospho mutants of FAK and Grb7 significantly attenuate SG disassembly during recovery. FAK activation followed by its phosphorylating Grb7 constitutes a cell-autonomous signalling pathway that regulates the disassembly of SGs and translational stimulation during recovery. This is the first reported pathway actively regulating the dynamics of SGs.
Keywords
Animals, Antigens, Surface/metabolism, Cell Line, Tumor, Cytoplasmic Granules/metabolism, ELAV Proteins, ELAV-Like Protein 1, Focal Adhesion Kinase 1/metabolism, GRB7 Adaptor Protein/metabolism, Hot Temperature, Mice, Phosphorylation, RNA-Binding Proteins/metabolism, Stress, Physiological
Pubmed
Web of science
Open Access
Yes
Create date
05/04/2019 16:47
Last modification date
20/08/2019 14:56
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