Title : Vps9, Rabex-5 and DSS4: proteins with weak but distinct nucleotide-exchange activities for Rab proteins.

Pub. Date : 2001 Jun 29

PMID : 11419942






2 Functional Relationships(s)
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1 The activities of three Rab-specific factors with GDP/GTP exchange activity, Vps9p, Rabex-5 and DSS4, with their cognate GTPases, Ypt51p, Rab5 and Ypt1p, have been analysed quantitatively. Guanosine Triphosphate RAB1A, member RAS oncogene family Homo sapiens
2 An additional, and based on present knowledge, unique, feature of the Ypt1p.DSS4 complex, is that the association of GTP (or GDP) is more than 10(3)-fold slower than to Ypt1p, thus leading to a long life-time of the binary complex between the two proteins, even at the high nucleotide concentrations that prevail in the cell. Guanosine Triphosphate RAB1A, member RAS oncogene family Homo sapiens