Conformational Dynamics of the Focal Adhesion Targeting Domain Control Specific Functions of Focal Adhesion Kinase in Cells
El Messari, Said
Arold, Stefan T.
KAUST DepartmentBiological and Environmental Sciences and Engineering (BESE) Division
Computational Bioscience Research Center (CBRC)
Online Publication Date2014-11-12
Print Publication Date2015-01-02
Permanent link to this recordhttp://hdl.handle.net/10754/556843
MetadataShow full item record
AbstractFocal adhesion (FA) kinase (FAK) regulates cell survival and motility by transducing signals from membrane receptors. The C-terminal FA targeting (FAT) domain of FAK fulfils multiple functions, including recruitment to FAs through paxillin binding. Phosphorylation of FAT on Tyr925 facilitates FA disassembly and connects to the MAPK pathway through Grb2 association, but requires dissociation of the first helix (H1) of the four-helix bundle of FAT. We investigated the importance of H1 opening in cells by comparing the properties of FAK molecules containing wild-type or mutated FAT with impaired or facilitated H1 openings. These mutations did not alter the activation of FAK, but selectively affected its cellular functions, including self-association, Tyr925 phosphorylation, paxillin binding, and FA targeting and turnover. Phosphorylation of Tyr861, located between the kinase and FAT domains, was also enhanced by the mutation that opened the FAT bundle. Similarly phosphorylation of Ser910 by ERK in response to bombesin was increased by FAT opening. Although FAK molecules with the mutation favoring FAT opening were poorly recruited at FAs, they efficiently restored FA turnover and cell shape in FAK-deficient cells. In contrast, the mutation preventing H1 opening markedly impaired FAK function. Our data support the biological importance of conformational dynamics of the FAT domain and its functional interactions with other parts of the molecule.
CitationConformational Dynamics of the Focal Adhesion Targeting Domain Control Specific Functions of Focal Adhesion Kinase in Cells 2015, 290 (1):478 Journal of Biological Chemistry
JournalJournal of Biological Chemistry
PubMed Central IDPMC4281750
- Interactions of the protein-tyrosine phosphatase-α with the focal adhesion targeting domain of focal adhesion kinase are involved in interleukin-1 signaling in fibroblasts.
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- Issue date: 2014 Jun 27
- Cortactin as a target for FAK in the regulation of focal adhesion dynamics.
- Authors: Tomar A, Lawson C, Ghassemian M, Schlaepfer DD
- Issue date: 2012
- FAK phosphorylation at Tyr-925 regulates cross-talk between focal adhesion turnover and cell protrusion.
- Authors: Deramaudt TB, Dujardin D, Hamadi A, Noulet F, Kolli K, De Mey J, Takeda K, Rondé P
- Issue date: 2011 Apr
- A non-canonical role for Rgnef in promoting integrin-stimulated focal adhesion kinase activation.
- Authors: Miller NL, Lawson C, Kleinschmidt EG, Tancioni I, Uryu S, Schlaepfer DD
- Issue date: 2013 Nov 1
- GIT1 utilizes a focal adhesion targeting-homology domain to bind paxillin.
- Authors: Schmalzigaug R, Garron ML, Roseman JT, Xing Y, Davidson CE, Arold ST, Premont RT
- Issue date: 2007 Aug