2min: Difference between revisions
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[[Image:2min.gif|left|200px]] | [[Image:2min.gif|left|200px]] | ||
'''NITROGENASE MOFE PROTEIN FROM AZOTOBACTER VINELANDII, OXIDIZED STATE''' | {{Structure | ||
|PDB= 2min |SIZE=350|CAPTION= <scene name='initialview01'>2min</scene>, resolution 2.03Å | |||
|SITE= | |||
|LIGAND= <scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=HCA:3-HYDROXY-3-CARBOXY-ADIPIC+ACID'>HCA</scene>, <scene name='pdbligand=CLF:FE(8)-S(7)+CLUSTER'>CLF</scene> and <scene name='pdbligand=CFM:FE-MO-S CLUSTER'>CFM</scene> | |||
|ACTIVITY= [http://en.wikipedia.org/wiki/Nitrogenase Nitrogenase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.18.6.1 1.18.6.1] | |||
|GENE= | |||
}} | |||
'''NITROGENASE MOFE PROTEIN FROM AZOTOBACTER VINELANDII, OXIDIZED STATE''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2MIN is a [ | 2MIN is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Azotobacter_vinelandii Azotobacter vinelandii]. This structure supersedes the now removed PDB entry 1MIN. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2MIN OCA]. | ||
==Reference== | ==Reference== | ||
Redox-dependent structural changes in the nitrogenase P-cluster., Peters JW, Stowell MH, Soltis SM, Finnegan MG, Johnson MK, Rees DC, Biochemistry. 1997 Feb 11;36(6):1181-7. PMID:[http:// | Redox-dependent structural changes in the nitrogenase P-cluster., Peters JW, Stowell MH, Soltis SM, Finnegan MG, Johnson MK, Rees DC, Biochemistry. 1997 Feb 11;36(6):1181-7. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/9063865 9063865] | ||
[[Category: Azotobacter vinelandii]] | [[Category: Azotobacter vinelandii]] | ||
[[Category: Nitrogenase]] | [[Category: Nitrogenase]] | ||
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[[Category: HCA]] | [[Category: HCA]] | ||
[[Category: biological nitrogen fixation]] | [[Category: biological nitrogen fixation]] | ||
[[Category: | [[Category: molybdoenzyme]] | ||
[[Category: nitrogen fixation]] | [[Category: nitrogen fixation]] | ||
[[Category: nitrogen metabolism]] | [[Category: nitrogen metabolism]] | ||
[[Category: oxidoreductase]] | [[Category: oxidoreductase]] | ||
''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 17:47:20 2008'' | ||
Revision as of 18:47, 20 March 2008
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| , resolution 2.03Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , , and | ||||||
| Activity: | Nitrogenase, with EC number 1.18.6.1 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
NITROGENASE MOFE PROTEIN FROM AZOTOBACTER VINELANDII, OXIDIZED STATE
OverviewOverview
The structure of the nitrogenase MoFe-protein from Azotobacter vinelandii has been refined to 2.0 A resolution in two oxidation states. EPR studies on the crystals indicate that the structures correspond to the spectroscopically assigned oxidized (P(OX)/M(OX)) and the native or dithionite-reduced (P(N)/M(N)) forms of the enzyme. Both MoFe-protein structures are essentially identical, with the exception of the P-cluster. The MoFe-protein P-cluster in each state is found to contain eight Fe and seven S atoms. Interconversion between the two redox states involves movement of two Fe atoms and an exchange of protein coordination for ligands supplied by a central S atom. In the oxidized P(OX) state, the cluster is coordinated by the protein through six cysteine ligands, Ser-beta188 O gamma, and the backbone amide of Cys-alpha88. In the native P(N) state, Ser-beta188 O gamma and the amide N of Cys-alpha88 no longer coordinate the cluster due to movement of their coordinated Fe atoms toward the central sulfur. Consequently, this central sulfur adopts a distorted octahedral environment with six surrounding Fe atoms. A previously described model of the P-cluster containing 8Fe-8S likely reflects the inappropriate modeling of a single structure to a mixture of these two P-cluster redox states. These observed redox-mediated structural changes of the P-cluster suggest a role for this cluster in coupling electron transfer and proton transfer in nitrogenase.
About this StructureAbout this Structure
2MIN is a Protein complex structure of sequences from Azotobacter vinelandii. This structure supersedes the now removed PDB entry 1MIN. Full crystallographic information is available from OCA.
ReferenceReference
Redox-dependent structural changes in the nitrogenase P-cluster., Peters JW, Stowell MH, Soltis SM, Finnegan MG, Johnson MK, Rees DC, Biochemistry. 1997 Feb 11;36(6):1181-7. PMID:9063865
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