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Functional roles and regulation of P-Rex a new family of guanine-nucleotide exchange factors
Reference
C19943
Principal Investigator / Supervisor
Dr Heidi Welch
Co-Investigators /
Co-Supervisors
Institution
Babraham Institute
Department
Molecular Signalling
Funding type
Research
Value (£)
149,593
Status
Completed
Type
Research Grant
Start date
24/11/2003
End date
23/11/2006
Duration
36 months
Abstract
We have recently identified the new P-Rex family of guanine-nucleotide exchange factors, comprising P-Rex1 and its predicted homologue P-Rex2. P.Rex1 is a direct activator of the monomeric GTPase Rac, a key regulator of a huge range of cellular functions. P-Rex1 activity is regulated by a unique mechanism, synergistically by the lipid second messenger PtdIns(3,4,5)P3 and the betagamma subunits of heterotrimeric G proteins. It is required for G protein-dependant reactive oxygen species formation in neutrophil-like cells. We propose: i) to clone and characterise P-Rex2; ii) to study the phenotype of the P-Rex1 mouse we are currently generating; iii) to make and use a panel of P-Rex mutants to study in detail the mechanisms of P-Rex regulation.
Summary
unavailable
Committee
Closed Committee - Biochemistry & Cell Biology (BCB)
Research Topics
X – not assigned to a current Research Topic
Research Priority
X – Research Priority information not available
Research Initiative
X - not in an Initiative
Funding Scheme
X – not Funded via a specific Funding Scheme
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