RANGAP1

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Identifiers
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External IDs	GeneCards: [1]
Orthologs
Species	Human	Mouse
Entrez	n/a	n/a
Ensembl	n/a	n/a
UniProt	n/a	n/a
RefSeq (mRNA)	n/a	n/a
RefSeq (protein)	n/a	n/a
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View/Edit Human

Further information on RanGAP proteins in non-human species: RanGAP

Ran GTPase-activating protein 1 is an enzyme that in humans is encoded by the RANGAP1 gene.

Function

RanGAP1, is a homodimeric 65-kD polypeptide that specifically induces the GTPase activity of RAN, but not of RAS by over 1,000-fold. RanGAP1 is the immediate antagonist of RCC1, a regulator molecule that keeps RAN in the active, GTP-bound state. The RANGAP1 gene encodes a 587-amino acid polypeptide. The sequence is unrelated to that of GTPase activators for other RAS-related proteins, but is 88% identical to Fug1, the murine homolog of yeast Rna1p. RanGAP1 and RCC1 control RAN-dependent transport between the nucleus and cytoplasm. RanGAP1 is a key regulator of the RAN GTP/GDP cycle.

Interactions

RanGAP1 is a trafficking protein which helps transport other proteins from the cytoplasm to the nucleus. Small ubiquitin-related modifier needs to be associated with it before it can be localized at the nuclear pore.

RANGAP1 has been shown to interact with:

• Ran, and
• UBE2I.

Further reading

• Becker J, Melchior F, Gerke V, Bischoff FR, Ponstingl H, Wittinghofer A (1995). "RNA1 encodes a GTPase-activating protein specific for Gsp1p, the Ran/TC4 homologue of Saccharomyces cerevisiae". J. Biol. Chem. 270 (20): 11860–5. doi:10.1074/jbc.270.20.11860. PMID 7744835.
• Bischoff FR, Klebe C, Kretschmer J, Wittinghofer A, Ponstingl H (1994). "RanGAP1 induces GTPase activity of nuclear Ras-related Ran". Proc. Natl. Acad. Sci. U.S.A. 91 (7): 2587–91. doi:10.1073/pnas.91.7.2587. PMC 43414. PMID 8146159.
• Krebber H, Ponstingl H (1997). "Ubiquitous expression and testis-specific alternative polyadenylation of mRNA for the human Ran GTPase activator RanGAP1". Gene. 180 (1–2): 7–11. doi:10.1016/S0378-1119(96)00389-7. PMID 8973340.
• Matunis MJ, Coutavas E, Blobel G (1997). "A novel ubiquitin-like modification modulates the partitioning of the Ran-GTPase-activating protein RanGAP1 between the cytosol and the nuclear pore complex". J. Cell Biol. 135 (6 Pt 1): 1457–70. doi:10.1083/jcb.135.6.1457. PMC 2133973. PMID 8978815.
• Mahajan R, Delphin C, Guan T, Gerace L, Melchior F (1997). "A small ubiquitin-related polypeptide involved in targeting RanGAP1 to nuclear pore complex protein RanBP2". Cell. 88 (1): 97–107. doi:10.1016/S0092-8674(00)81862-0. PMID 9019411.
• Görlich D, Dabrowski M, Bischoff FR, Kutay U, Bork P, Hartmann E, Prehn S, Izaurralde E (1997). "A Novel Class of RanGTP Binding Proteins". J. Cell Biol. 138 (1): 65–80. doi:10.1083/jcb.138.1.65. PMC 2139951. PMID 9214382.
• Scheffzek K, Ahmadian MR, Kabsch W, Wiesmüller L, Lautwein A, Schmitz F, Wittinghofer A (1998). "The Ras-RasGAP complex: structural basis for GTPase activation and its loss in oncogenic Ras mutants". Science. 277 (5324): 333–8. doi:10.1126/science.277.5324.333. PMID 9219684.
• Mahajan R, Gerace L, Melchior F (1998). "Molecular Characterization of the SUMO-1 Modification of RanGAP1 and Its Role in Nuclear Envelope Association". J. Cell Biol. 140 (2): 259–70. doi:10.1083/jcb.140.2.259. PMC 2132567. PMID 9442102.
• Kamitani T, Kito K, Nguyen HP, Fukuda-Kamitani T, Yeh ET (1998). "Characterization of a second member of the sentrin family of ubiquitin-like proteins". J. Biol. Chem. 273 (18): 11349–53. doi:10.1074/jbc.273.18.11349. PMID 9556629.
• Okuma T, Honda R, Ichikawa G, Tsumagari N, Yasuda H (1999). "In vitro SUMO-1 modification requires two enzymatic steps, E1 and E2". Biochem. Biophys. Res. Commun. 254 (3): 693–8. doi:10.1006/bbrc.1998.9995. PMID 9920803.
• Hillig RC, Renault L, Vetter IR, Drell T, Wittinghofer A, Becker J (1999). "The crystal structure of rna1p: a new fold for a GTPase-activating protein". Mol. Cell. 3 (6): 781–91. doi:10.1016/S1097-2765(01)80010-1. PMID 10394366.
• Dunham I, Shimizu N, Roe BA, Chissoe S, Hunt AR, Collins JE, Bruskiewich R, Beare DM, Clamp M, Smink LJ, Ainscough R, Almeida JP, Babbage A, Bagguley C, Bailey J, Barlow K, Bates KN, Beasley O, Bird CP, Blakey S, Bridgeman AM, Buck D, Burgess J, Burrill WD, O'Brien KP (1999). "The DNA sequence of human chromosome 22". Nature. 402 (6761): 489–95. doi:10.1038/990031. PMID 10591208.
• Nagase T, Nakayama M, Nakajima D, Kikuno R, Ohara O (2001). "Prediction of the coding sequences of unidentified human genes. XX. The complete sequences of 100 new cDNA clones from brain which code for large proteins in vitro". DNA Res. 8 (2): 85–95. doi:10.1093/dnares/8.2.85. PMID 11347906.
• Bernier-Villamor V, Sampson DA, Matunis MJ, Lima CD (2002). "Structural basis for E2-mediated SUMO conjugation revealed by a complex between ubiquitin-conjugating enzyme Ubc9 and RanGAP1". Cell. 108 (3): 345–56. doi:10.1016/S0092-8674(02)00630-X. PMID 11853669.
• Joseph J, Tan SH, Karpova TS, McNally JG, Dasso M (2002). "SUMO-1 targets RanGAP1 to kinetochores and mitotic spindles". J. Cell Biol. 156 (4): 595–602. doi:10.1083/jcb.200110109. PMC 2174074. PMID 11854305.
• Zhang H, Saitoh H, Matunis MJ (2002). "Enzymes of the SUMO Modification Pathway Localize to Filaments of the Nuclear Pore Complex". Mol. Cell. Biol. 22 (18): 6498–508. doi:10.1128/MCB.22.18.6498-6508.2002. PMC 135644. PMID 12192048.
• Beausoleil SA, Jedrychowski M, Schwartz D, Elias JE, Villén J, Li J, Cohn MA, Cantley LC, Gygi SP (2004). "Large-scale characterization of HeLa cell nuclear phosphoproteins". Proc. Natl. Acad. Sci. U.S.A. 101 (33): 12130–5. doi:10.1073/pnas.0404720101. PMC 514446. PMID 15302935.
• Macauley MS, Errington WJ, Okon M, Schärpf M, Mackereth CD, Schulman BA, McIntosh LP (2005). "Structural and dynamic independence of isopeptide-linked RanGAP1 and SUMO-1". J. Biol. Chem. 279 (47): 49131–7. doi:10.1074/jbc.M408705200. PMID 15355965.