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Ran-GTPase activating protein 1 (RanGAP1), C-terminal domain superfamily
SCOP classification
Superfamily statistics
Functional annotation
| General category | Regulation |
| Detailed category | Signal transduction |
Document: Function annotation of SCOP domain superfamilies
InterPro annotation
| Cross references | IPR009109 SSF69099 Protein matches |
| Abstract | Ran GTPase is a ubiquitous protein required for nuclear transport, spindle assembly, nuclear assembly and mitotic cell cycle regulation. RanGTPase activating protein 1 (RanGAP1) is one of several RanGTPase accessory proteins. During interphase, RanGAP1 is located in the cytoplasm, while during mitosis it becomes associated with the kinetochores [ 12852855]. Cytoplasmic RanGAP1 is required for RanGTPase-directed nuclear transport. The activity of RanGAP1 requires the accessory protein RanBP1. RanBP1 facilitates RanGAP1 hydrolysis of Ran-GTP, both directly and by promoting the dissociation of Ran-GTP from transport receptors, which would otherwise block RanGAP1-mediated hydrolysis. RanGAP1 is thought to bind to the Switch 1 and Switch 2 regions of RanGTPase. The Switch 2 region can be buried in complexes with karyopherin-beta2, and requires the interaction with RanBP1 to permit RanGAP1 function. RanGAP1 can undergo SUMO (small ubiquitin-like modifier) modification, which targets RanGAP1 to RanBP2/Nup358 in the nuclear pore complex, and is required for association with the nuclear pore complex and for nuclear transport [11853669]. The enzymes involved in SUMO modification are located on the filaments of the nuclear pore complex.
The RanGAP1 N-terminal domain is fairly well conserved between vertebrate and fungal proteins, but yeast does not contain the C-terminal domain. The C-terminal domain is SUMO-modified and required for the localisation of RanGAP1 at the nuclear pore complex. The structure of the C-terminal domain is multihelical, consisting of two curved alpha/alpha layers in a right-handed superhelix. |
InterPro database
PDBeMotif information about ligands, sequence and structure motifs
PDBeMotif resource
Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation ]
Internal database links
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Browse genome assignments for this superfamily. The SUPERFAMILY hidden Markov model library has been used to carry
out SCOP domain assignments to all genomes at the superfamily level.
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Alignments of sequences to 2 models
in this superfamily are available by clicking on the 'Alignments' icon above. PDB sequences less than 40% identical
are shown by default, but any other sequence(s) may be aligned. Select PDB sequences, genome sequences, or paste in or upload your own sequences.
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Browse and view proteins in genomes which have
different domain combinations including a Ran-GTPase activating protein 1 (RanGAP1), C-terminal domain domain.
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Examine the distribution of domain superfamilies, or families, across the major taxonomic kingdoms or genomes within a kingdom. This gives an immediate impression of how superfamilies, or families, are restricted to certain kingdoms of life.
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Explore domain occurrence network where nodes represent genomes and edges are domain architectures (shared between genomes) containing the superfamily of interest.
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There are 2 hidden Markov models representing the Ran-GTPase activating protein 1 (RanGAP1), C-terminal domain superfamily. Information on how the models are built, and plots showing hydrophobicity, match emmission probabilities and insertion/deletion probabilities can be inspected.
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Jump to [ Top of page · SCOP classification · InterPro annotation · PDBeMotif links · Functional annotation · Internal database links ]
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