2qe7
From Proteopedia
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[[Image:2qe7.jpg|left|200px]] | [[Image:2qe7.jpg|left|200px]] | ||
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| - | + | {{STRUCTURE_2qe7| PDB=2qe7 | SCENE= }} | |
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'''Crystal structure of the f1-atpase from the thermoalkaliphilic bacterium bacillus sp. ta2.a1''' | '''Crystal structure of the f1-atpase from the thermoalkaliphilic bacterium bacillus sp. ta2.a1''' | ||
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The structural basis for unidirectional rotation of thermoalkaliphilic F1-ATPase., Stocker A, Keis S, Vonck J, Cook GM, Dimroth P, Structure. 2007 Aug;15(8):904-14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17697996 17697996] | The structural basis for unidirectional rotation of thermoalkaliphilic F1-ATPase., Stocker A, Keis S, Vonck J, Cook GM, Dimroth P, Structure. 2007 Aug;15(8):904-14. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/17697996 17697996] | ||
[[Category: Bacillus sp. ta2 a1]] | [[Category: Bacillus sp. ta2 a1]] | ||
| - | [[Category: H(+)-transporting two-sector ATPase]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
[[Category: Cook, G M.]] | [[Category: Cook, G M.]] | ||
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[[Category: Stocker, A.]] | [[Category: Stocker, A.]] | ||
[[Category: Vonck, J.]] | [[Category: Vonck, J.]] | ||
| - | [[Category: | + | [[Category: Atp synthase]] |
| - | [[Category: | + | [[Category: Blockage of atp hydrolysis]] |
| - | [[Category: | + | [[Category: Crystal structure]] |
| - | [[Category: | + | [[Category: F1-atpase]] |
| - | [[Category: | + | [[Category: Hydrolase]] |
| - | [[Category: | + | [[Category: Single particle analysis]] |
| - | [[Category: | + | [[Category: Thermoalkaliphilic]] |
| - | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun May 4 14:48:19 2008'' | |
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | |
Revision as of 11:48, 4 May 2008
Crystal structure of the f1-atpase from the thermoalkaliphilic bacterium bacillus sp. ta2.a1
Overview
The ATP synthase of the thermoalkaliphilic Bacillus sp. TA2.A1 operates exclusively in ATP synthesis direction. In the crystal structure of the nucleotide-free alpha(3)beta(3)gamma epsilon subcomplex (TA2F(1)) at 3.1 A resolution, all three beta subunits adopt the open beta(E) conformation. The structure shows salt bridges between the helix-turn-helix motif of the C-terminal domain of the beta(E) subunit (residues Asp372 and Asp375) and the N-terminal helix of the gamma subunit (residues Arg9 and Arg10). These electrostatic forces pull the gamma shaft out of the rotational center and impede rotation through steric interference with the beta(E) subunit. Replacement of Arg9 and Arg10 with glutamines eliminates the salt bridges and results in an activation of ATP hydrolysis activity, suggesting that these salt bridges prevent the native enzyme from rotating in ATP hydrolysis direction. A similar bending of the gamma shaft as in the TA2F(1) structure was observed by single-particle analysis of the TA2F(1)F(o) holoenzyme.
About this Structure
2QE7 is a Protein complex structure of sequences from Bacillus sp. ta2.a1. Full crystallographic information is available from OCA.
Reference
The structural basis for unidirectional rotation of thermoalkaliphilic F1-ATPase., Stocker A, Keis S, Vonck J, Cook GM, Dimroth P, Structure. 2007 Aug;15(8):904-14. PMID:17697996 Page seeded by OCA on Sun May 4 14:48:19 2008
