2bku
From Proteopedia
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|PDB= 2bku |SIZE=350|CAPTION= <scene name='initialview01'>2bku</scene>, resolution 2.70Å | |PDB= 2bku |SIZE=350|CAPTION= <scene name='initialview01'>2bku</scene>, resolution 2.70Å | ||
|SITE= <scene name='pdbsite=AC1:Mg+Binding+Site+For+Chain+C'>AC1</scene> | |SITE= <scene name='pdbsite=AC1:Mg+Binding+Site+For+Chain+C'>AC1</scene> | ||
| - | |LIGAND= <scene name='pdbligand= | + | |LIGAND= <scene name='pdbligand=GTP:GUANOSINE-5'-TRIPHOSPHATE'>GTP</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2bku FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2bku OCA], [http://www.ebi.ac.uk/pdbsum/2bku PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2bku RCSB]</span> | ||
}} | }} | ||
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[[Category: Matsuura, Y.]] | [[Category: Matsuura, Y.]] | ||
[[Category: Stewart, M.]] | [[Category: Stewart, M.]] | ||
| - | [[Category: GTP]] | ||
| - | [[Category: MG]] | ||
[[Category: gtp binding]] | [[Category: gtp binding]] | ||
[[Category: importin-beta]] | [[Category: importin-beta]] | ||
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[[Category: rangtp]] | [[Category: rangtp]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 02:07:55 2008'' |
Revision as of 23:07, 30 March 2008
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| , resolution 2.70Å | |||||||
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| Sites: | |||||||
| Ligands: | , | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
KAP95P:RANGTP COMPLEX
Overview
Nuclear protein import is mediated mainly by the transport factor importin-beta that binds cytoplasmic cargo, most often via the importin-alpha adaptor, and then transports it through nuclear pore complexes. This active transport is driven by disassembly of the import complex by nuclear RanGTP. The switch I and II loops of Ran change conformation with nucleotide state, and regulate its interactions with nuclear trafficking components. Importin-beta consists of 19 HEAT repeats that are based on a pair of antiparallel alpha-helices (referred to as the A- and B-helices). The HEAT repeats stack to yield two C-shaped arches, linked together to form a helicoidal molecule that has considerable conformational flexibility. Here we present the structure of full-length yeast importin-beta (Kap95p or karyopherin-beta) complexed with RanGTP, which provides a basis for understanding the crucial cargo-release step of nuclear import. We identify a key interaction site where the RanGTP switch I loop binds to the carboxy-terminal arch of Kap95p. This interaction produces a change in helicoidal pitch that locks Kap95p in a conformation that cannot bind importin-alpha or cargo. We suggest an allosteric mechanism for nuclear import complex disassembly by RanGTP.
About this Structure
2BKU is a Protein complex structure of sequences from Canis lupus familiaris and Saccharomyces cerevisiae. The following page contains interesting information on the relation of 2BKU with [Importins]. Full crystallographic information is available from OCA.
Reference
Structural basis for nuclear import complex dissociation by RanGTP., Lee SJ, Matsuura Y, Liu SM, Stewart M, Nature. 2005 Jun 2;435(7042):693-6. Epub 2005 May 1. PMID:15864302
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