RANGAP1

GTPase activator for RAN (PubMed:16428860, PubMed:8146159, PubMed:8896452). Converts cytoplasmic GTP-bound RAN to GDP-bound RAN, which is essential for RAN-mediated nuclear import and export (PubMed:27160050, PubMed:8896452). Mediates dissociation of cargo from nuclear export complexes containing XPO1, RAN and RANBP2 after nuclear export (PubMed:27160050).

Phosphorylation occurs before nuclear envelope breakdown and continues throughout mitosis. Phosphorylated by the M-phase kinase cyclin B/Cdk1, in vitro. Differential timimg of dephosphorylation occurs during phases of mitosis. The phosphorylated form remains associated with RANBP2/NUP358 and the SUMO E2-conjugating enzyme, UBE2I, on nuclear pore complex (NPC) diassembly and during mitosis.

Sumoylated (PubMed:11854305, PubMed:15037602, PubMed:26304119, PubMed:27160050). Sumoylation is necessary for targeting to the nuclear envelope (NE), and for association with mitotic spindles and kinetochores during mitosis (PubMed:11854305). Also required for interaction with RANBP2 and is mediated by UBE2I (PubMed:27160050). Desumoylated by HINT1 (By similarity).

Belongs to the RNA1 family.

Highly expressed in brain, thymus and testis.

• Cytoplasm
• Nucleus
• Nucleoplasm
• Nucleus envelope
• Chromosome
• Centromere
• Kinetochore
• Cytoplasm
• Cytoskeleton
• Spindle
• Cytoplasmic during interphase. Detected at the nuclear envelope during interphase (PubMed:11854305, PubMed:15037602). Targeted to the nuclear pores after sumoylation (PubMed:11854305). During mitosis, associates with mitotic spindles, but is essentially not detected at the spindle poles (PubMed:11854305, PubMed:15037602). Association with kinetochores appears soon after nuclear envelope breakdown and persists until late anaphase (PubMed:11854305). Mitotic location also requires sumoylation (PubMed:11854305).

KIAA1835, SD, RANGAP1, Ran GTPase-activating protein 1, RanGAP1

• entrezGene:5905
• omim:602362
• swissprot:P46060

Proteins

Epigenetics

63542Da