RanGAP1 is the activator of the Ras-related nuclear GTPase Ran, which is involved in the nucleocytoplasmic transport, mitotic spindle assembly, cell cycle control and nuclear envelope (NE) formation (1, 2). Its roles are accomplished by the asymmetric distribution of its GTP- and GDP-bound forms, enabled by the specific localization of Ran accessory proteins, the Ran GTPase-activating protein RanGAP and the nucleotide exchange factor RCC. Mammalian RanGAP1 is targeted to the NE during interphase and to the spindle and kinetochores during mitosis via SUMOylated C-terminal domain and interaction with the nucleoporin Nup358/RanBP2 (2). RanGAP1 is highly expressed in brain, thymus and testis (3).
Related Pathway
Cell cycle
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