2f43: Difference between revisions
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[[Image:2f43.gif|left|200px]] | [[Image:2f43.gif|left|200px]] | ||
'''Rat liver F1-ATPase''' | {{Structure | ||
|PDB= 2f43 |SIZE=350|CAPTION= <scene name='initialview01'>2f43</scene>, resolution 3.00Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=VO4:VANADATE+ION'>VO4</scene>, <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=ATP:ADENOSINE-5'-TRIPHOSPHATE'>ATP</scene> and <scene name='pdbligand=ADP:ADENOSINE-5'-DIPHOSPHATE'>ADP</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/H(+)-transporting_two-sector_ATPase H(+)-transporting two-sector ATPase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=3.6.3.14 3.6.3.14] | |||
|GENE= | |||
}} | |||
'''Rat liver F1-ATPase''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2F43 is a [ | 2F43 is a [[Protein complex]] structure of sequences 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=2F43 OCA]. | ||
==Reference== | ==Reference== | ||
Mitochondrial ATP synthase. Crystal structure of the catalytic F1 unit in a vanadate-induced transition-like state and implications for mechanism., Chen C, Saxena AK, Simcoke WN, Garboczi DN, Pedersen PL, Ko YH, J Biol Chem. 2006 May 12;281(19):13777-83. Epub 2006 Mar 10. PMID:[http:// | Mitochondrial ATP synthase. Crystal structure of the catalytic F1 unit in a vanadate-induced transition-like state and implications for mechanism., Chen C, Saxena AK, Simcoke WN, Garboczi DN, Pedersen PL, Ko YH, J Biol Chem. 2006 May 12;281(19):13777-83. Epub 2006 Mar 10. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16531409 16531409] | ||
[[Category: H(+)-transporting two-sector ATPase]] | [[Category: H(+)-transporting two-sector ATPase]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: vanadate]] | [[Category: vanadate]] | ||
''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 16:47:51 2008'' | ||
Revision as of 17:47, 20 March 2008
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| , resolution 3.00Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , and | ||||||
| Activity: | H(+)-transporting two-sector ATPase, with EC number 3.6.3.14 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Rat liver F1-ATPase
OverviewOverview
ATP synthesis from ADP, P(i), and Mg2+ takes place in mitochondria on the catalytic F1 unit (alpha3beta3gammedeltaepsilon) of the ATP synthase complex (F0F1), a remarkable nanomachine that interconverts electrochemical and mechanical energy, producing the high energy terminal bond of ATP. In currently available structural models of F1, the P-loop (amino acid residues 156GGAGVGKT163) contributes to substrate binding at the subunit catalytic sites. Here, we report the first transition state-like structure of F1 (ADP.V(i).Mg.F1) from rat liver that was crystallized with the phosphate (P(i)) analog vanadate (VO(3-)4 or V(i)). Compared with earlier "ground state" structures, this new F1 structure reveals that the active site region has undergone significant remodeling. P-loop residue alanine 158 is located much closer to V(i) than it is to P(i) in a previous structural model. No significant movements of P-loop residues of the subunit were observed at its analogous but noncatalytic sites. Under physiological conditions, such active site remodeling involving the small hydrophobic alanine residue may promote ATP synthesis by lowering the local dielectric constant, thus facilitating the dehydration of ADP and P(i). This new crystallographic study provides strong support for the catalytic mechanism of ATP synthesis deduced from earlier biochemical studies of liver F1 conducted in the presence of V(i) (Ko, Y. H., Bianchet, M., Amzel, L. M., and Pedersen, P. L. (1997) J. Biol. Chem. 272, 18875-18881; Ko, Y. H., Hong, S., and Pedersen, P. L. (1999) J. Biol. Chem. 274, 28853-28856).
About this StructureAbout this Structure
2F43 is a Protein complex structure of sequences from Rattus norvegicus. Full crystallographic information is available from OCA.
ReferenceReference
Mitochondrial ATP synthase. Crystal structure of the catalytic F1 unit in a vanadate-induced transition-like state and implications for mechanism., Chen C, Saxena AK, Simcoke WN, Garboczi DN, Pedersen PL, Ko YH, J Biol Chem. 2006 May 12;281(19):13777-83. Epub 2006 Mar 10. PMID:16531409
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