1dpf: Difference between revisions
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[[Image:1dpf.gif|left|200px]] | [[Image:1dpf.gif|left|200px]] | ||
'''CRYSTAL STRUCTURE OF A MG-FREE FORM OF RHOA COMPLEXED WITH GDP''' | {{Structure | ||
|PDB= 1dpf |SIZE=350|CAPTION= <scene name='initialview01'>1dpf</scene>, resolution 2.0Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=GDP:GUANOSINE-5'-DIPHOSPHATE'>GDP</scene> | |||
|ACTIVITY= | |||
|GENE= | |||
}} | |||
'''CRYSTAL STRUCTURE OF A MG-FREE FORM OF RHOA COMPLEXED WITH GDP''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1DPF is a [ | 1DPF is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1DPF OCA]. | ||
==Reference== | ==Reference== | ||
An open conformation of switch I revealed by the crystal structure of a Mg2+-free form of RHOA complexed with GDP. Implications for the GDP/GTP exchange mechanism., Shimizu T, Ihara K, Maesaki R, Kuroda S, Kaibuchi K, Hakoshima T, J Biol Chem. 2000 Jun 16;275(24):18311-7. PMID:[http:// | An open conformation of switch I revealed by the crystal structure of a Mg2+-free form of RHOA complexed with GDP. Implications for the GDP/GTP exchange mechanism., Shimizu T, Ihara K, Maesaki R, Kuroda S, Kaibuchi K, Hakoshima T, J Biol Chem. 2000 Jun 16;275(24):18311-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/10748207 10748207] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: protein rhoa-gdp complex]] | [[Category: protein rhoa-gdp complex]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 10:42:08 2008'' | ||
Revision as of 08:42, 20 March 2008
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| 1dpf, resolution 2.0Å | |||||||||||||
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| Ligands: | GDP | ||||||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||||||
CRYSTAL STRUCTURE OF A MG-FREE FORM OF RHOA COMPLEXED WITH GDP
Overview
Mg(2+) ions are essential for guanosine triphosphatase (GTPase) activity and play key roles in guanine nucleotide binding and preserving the structural integrity of GTP-binding proteins. We determined the crystal structure of a small GTPase RHOA complexed with GDP in the absence of Mg(2+) at 2.0-A resolution. Elimination of a Mg(2+) ion induces significant conformational changes in the switch I region that opens up the nucleotide-binding site. Similar structural changes have been observed in the switch regions of Ha-Ras bound to its guanine nucleotide exchange factor, Sos. This RHOA-GDP structure reveals an important regulatory role for Mg(2+) and suggests that guanine nucleotide exchange factor may utilize this feature of switch I to produce an open conformation in GDP/GTP exchange.
About this Structure
1DPF is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
An open conformation of switch I revealed by the crystal structure of a Mg2+-free form of RHOA complexed with GDP. Implications for the GDP/GTP exchange mechanism., Shimizu T, Ihara K, Maesaki R, Kuroda S, Kaibuchi K, Hakoshima T, J Biol Chem. 2000 Jun 16;275(24):18311-7. PMID:10748207
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