1gdd: Difference between revisions
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[[Image:1gdd.jpg|left|200px]] | [[Image:1gdd.jpg|left|200px]] | ||
'''TERTIARY AND QUATERNARY STRUCTURAL CHANGES IN GIA1 INDUCED BY GTP HYDROLYSIS''' | {{Structure | ||
|PDB= 1gdd |SIZE=350|CAPTION= <scene name='initialview01'>1gdd</scene>, resolution 2.2Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=SO4:SULFATE+ION'>SO4</scene> and <scene name='pdbligand=GDP:GUANOSINE-5'-DIPHOSPHATE'>GDP</scene> | |||
|ACTIVITY= | |||
|GENE= | |||
}} | |||
'''TERTIARY AND QUATERNARY STRUCTURAL CHANGES IN GIA1 INDUCED BY GTP HYDROLYSIS''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
1GDD is a [ | 1GDD is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Rattus_norvegicus Rattus norvegicus]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1GDD OCA]. | ||
==Reference== | ==Reference== | ||
Tertiary and quaternary structural changes in Gi alpha 1 induced by GTP hydrolysis., Mixon MB, Lee E, Coleman DE, Berghuis AM, Gilman AG, Sprang SR, Science. 1995 Nov 10;270(5238):954-60. PMID:[http:// | Tertiary and quaternary structural changes in Gi alpha 1 induced by GTP hydrolysis., Mixon MB, Lee E, Coleman DE, Berghuis AM, Gilman AG, Sprang SR, Science. 1995 Nov 10;270(5238):954-60. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/7481799 7481799] | ||
[[Category: Rattus norvegicus]] | [[Category: Rattus norvegicus]] | ||
[[Category: Single protein]] | [[Category: Single protein]] | ||
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[[Category: gtp-ase]] | [[Category: gtp-ase]] | ||
''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 11:21:38 2008'' | ||
Revision as of 12:21, 20 March 2008
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| , resolution 2.2Å | |||||||
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
TERTIARY AND QUATERNARY STRUCTURAL CHANGES IN GIA1 INDUCED BY GTP HYDROLYSIS
OverviewOverview
Crystallographic analysis of 2.2 angstrom resolution shows that guanosine triphosphate (GTP) hydrolysis triggers conformational changes in the heterotrimeric G-protein alpha subunit, Gi alpha 1. The switch II and switch III segments become disordered, and linker II connecting the Ras and alpha helical domains moves, thus altering the structures of potential effector and beta gamma binding regions. Contacts between the alpha-helical and Ras domains are weakened, possibly facilitating the release of guanosine diphosphate (GDP). The amino and carboxyl termini, which contain receptor and beta gamma binding determinants, are disordered in the complex with GTP, but are organized into a compact microdomain on GDP hydrolysis. The amino terminus also forms extensive quaternary contacts with neighboring alpha subunits in the lattice, suggesting that multimers of alpha subunits or heterotrimers may play a role in signal transduction.
About this StructureAbout this Structure
1GDD is a Single protein structure of sequence from Rattus norvegicus. Full crystallographic information is available from OCA.
ReferenceReference
Tertiary and quaternary structural changes in Gi alpha 1 induced by GTP hydrolysis., Mixon MB, Lee E, Coleman DE, Berghuis AM, Gilman AG, Sprang SR, Science. 1995 Nov 10;270(5238):954-60. PMID:7481799
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