FUNCTION: Substrate-binding subunit of the Rab geranylgeranyltransferase (GGTase) complex. Binds unprenylated Rab proteins and presents the substrate peptide to the catalytic component B composed of RABGGTA and RABGGTB, and remains bound to it after the geranylgeranyl transfer reaction. The componen...
FUNCTION: Substrate-binding subunit of the Rab geranylgeranyltransferase (GGTase) complex. Binds unprenylated Rab proteins and presents the substrate peptide to the catalytic component B composed of RABGGTA and RABGGTB, and remains bound to it after the geranylgeranyl transfer reaction. The component A is thought to be regenerated by transferring its prenylated Rab back to the donor membrane. Besides, a pre-formed complex consisting of CHM and the Rab GGTase dimer (RGGT or component B) can bind to and prenylate Rab proteins; this alternative pathway is proposed to be the predominant pathway for Rab protein geranylgeranylation. {ECO:0000269|PubMed:18532927, ECO:0000269|PubMed:7957092}.
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GO - Biological processes (BP):
protein geranylgeranylation [GO:0018344]; protein targeting to membrane [GO:0006612]; small GTPase mediated signal transduction [GO:0007264]; vesicle-mediated transport [GO:0016192]; visual perception [GO:0007601]...
protein geranylgeranylation [GO:0018344]; protein targeting to membrane [GO:0006612]; small GTPase mediated signal transduction [GO:0007264]; vesicle-mediated transport [GO:0016192]; visual perception [GO:0007601]
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GO - Molecular function (MF):
GDP-dissociation inhibitor activity [GO:0005092]; GTPase activator activity [GO:0005096]; Rab geranylgeranyltransferase activity [GO:0004663]; small GTPase binding [GO:0031267]...
GDP-dissociation inhibitor activity [GO:0005092]; GTPase activator activity [GO:0005096]; Rab geranylgeranyltransferase activity [GO:0004663]; small GTPase binding [GO:0031267]
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GO - Cellular component (CC):
cytoplasm [GO:0005737]; cytosol [GO:0005829]; nucleus [GO:0005634]; Rab-protein geranylgeranyltransferase complex [GO:0005968]...
cytoplasm [GO:0005737]; cytosol [GO:0005829]; nucleus [GO:0005634]; Rab-protein geranylgeranyltransferase complex [GO:0005968]
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