Title : Roles of Ran-GTP and Ran-GDP in precursor vesicle recruitment and fusion during nuclear envelope assembly in a human cell-free system.

Pub. Date : 2001 Feb 6

PMID : 11231159






6 Functional Relationships(s)
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1 Both generation of Ran-GTP by the guanine nucleotide exchange factor RCC1 and GTP hydrolysis by Ran are required for NE assembly, although the roles of the GDP- and GTP-bound forms of Ran in the recruitment of precursor vesicles and their fusion have been unclear. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens
2 Both generation of Ran-GTP by the guanine nucleotide exchange factor RCC1 and GTP hydrolysis by Ran are required for NE assembly, although the roles of the GDP- and GTP-bound forms of Ran in the recruitment of precursor vesicles and their fusion have been unclear. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens
3 Both generation of Ran-GTP by the guanine nucleotide exchange factor RCC1 and GTP hydrolysis by Ran are required for NE assembly, although the roles of the GDP- and GTP-bound forms of Ran in the recruitment of precursor vesicles and their fusion have been unclear. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens
4 However, addition of antibodies to RCC1 and RanGAP1 shows that Ran-GDP must be converted to Ran-GTP by RCC1 before precursor vesicles are recruited, whereas GTP hydrolysis by Ran stimulated by RanGAP1 promotes vesicle recruitment and is necessary for vesicle fusion to form an intact envelope. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens
5 However, addition of antibodies to RCC1 and RanGAP1 shows that Ran-GDP must be converted to Ran-GTP by RCC1 before precursor vesicles are recruited, whereas GTP hydrolysis by Ran stimulated by RanGAP1 promotes vesicle recruitment and is necessary for vesicle fusion to form an intact envelope. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens
6 Thus, the GTP-GDP cycle of Ran controls both the recruitment of vesicles and their fusion to form NEs. Guanosine Triphosphate RAN, member RAS oncogene family Homo sapiens