2ase: Difference between revisions
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|GENE= CDC42 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | |GENE= CDC42 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens]) | ||
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|RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ase FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ase OCA], [http://www.ebi.ac.uk/pdbsum/2ase PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2ase RCSB]</span> | |||
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[[Category: gtp binding protein]] | [[Category: gtp binding protein]] | ||
''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 01:56:42 2008'' | ||
Revision as of 01:56, 31 March 2008
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| Gene: | CDC42 (Homo sapiens) | ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
NMR structure of the F28L mutant of Cdc42Hs
OverviewOverview
Cdc42Hs(F28L) is a single-point mutant of Cdc42Hs, a member of the Ras superfamily of GTP-binding proteins, that facilitates cellular transformation brought about by an increased rate of cycling between GTP and GDP [Lin, R., et al. (1997) Curr. Biol. 7, 794-797]. Dynamics studies of Cdc42Hs(F28L)-GDP have shown increased flexibility for several residues at the nucleotide-binding site [Adams, P. D., et al. (2004) Biochemistry 43, 9968-9977]. The solution structure of Cdc42Hs-GDP (wild type) has previously been determined by NMR spectroscopy [Feltham, J. L., et al. (1997) Biochemistry 36, 8755-8766]. Here, we describe the solution structure of Cdc42Hs(F28L)-GDP, which provides insight into the structural basis for the change in affinity for GDP. Heteronuclear NMR experiments were performed to assign resonances in the protein, and distance, hydrogen bonding, residual dipolar coupling, and dihedral angle constraints were used to calculate a set of low-energy structures using distance geometry and simulated annealing refinement protocols. The overall structure of Cdc42Hs(F28L)-GDP is very similar to that of wild-type Cdc42Hs, consisting of a centrally located six-stranded beta-sheet structure surrounding the C-terminal alpha-helix [Feltham, J. L., et al. (1997) Biochemistry 36, 8755-8766]. In addition, the same three regions in wild-type Cdc42Hs that show structural disorder (Switch I, Switch II, and the Insert region) are disordered in F28L as well. Although the structure of Cdc42Hs(F28L)-GDP is very similar to that of the wild type, interactions with the nucleotide and hydrogen bonding within the nucleotide binding site are altered, and the region surrounding L28 is substantially more disordered.
About this StructureAbout this Structure
2ASE is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Solution structure of an oncogenic mutant of Cdc42Hs., Adams PD, Oswald RE, Biochemistry. 2006 Feb 28;45(8):2577-83. PMID:16489751
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