2a3m
From Proteopedia
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|PDB= 2a3m |SIZE=350|CAPTION= <scene name='initialview01'>2a3m</scene>, resolution 1.500Å | |PDB= 2a3m |SIZE=350|CAPTION= <scene name='initialview01'>2a3m</scene>, resolution 1.500Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN IX CONTAINING FE'>HEM</scene> | + | |LIGAND= <scene name='pdbligand=HEM:PROTOPORPHYRIN+IX+CONTAINING+FE'>HEM</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY= | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2a3m FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2a3m OCA], [http://www.ebi.ac.uk/pdbsum/2a3m PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=2a3m RCSB]</span> | ||
}} | }} | ||
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[[Category: Tanner, J J.]] | [[Category: Tanner, J J.]] | ||
[[Category: Wall, J D.]] | [[Category: Wall, J D.]] | ||
| - | [[Category: HEM]] | ||
[[Category: cytochrome c3]] | [[Category: cytochrome c3]] | ||
[[Category: desulfovibrio]] | [[Category: desulfovibrio]] | ||
[[Category: tetraheme cytochrome]] | [[Category: tetraheme cytochrome]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Mar 31 01:47:24 2008'' |
Revision as of 22:47, 30 March 2008
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| , resolution 1.500Å | |||||||
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| Ligands: | |||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Structure of Desulfovibrio desulfuricans G20 tetraheme cytochrome (oxidized form)
Overview
The structure of the type I tetraheme cytochrome c(3) from Desulfovibrio desulfuricans G20 was determined to 1.5 Angstrom by X-ray crystallography. In addition to the oxidized form, the structure of the molybdate-bound form of the protein was determined from oxidized crystals soaked in sodium molybdate. Only small structural shifts were obtained with metal binding, consistent with the remarkable structural stability of this protein. In vitro experiments with pure cytochrome showed that molybdate could oxidize the reduced cytochrome, although not as rapidly as U(VI) present as uranyl acetate. Alterations in the overall conformation and thermostability of the metal-oxidized protein were investigated by circular dichroism studies. Again, only small changes in protein structure were documented. The location of the molybdate ion near heme IV in the crystal structure suggested heme IV as the site of electron exit from the reduced cytochrome and implicated Lys14 and Lys56 in binding. Analysis of structurally conserved water molecules in type I cytochrome c(3) crystal structures identified interactions predicted to be important for protein stability and possibly for intramolecular electron transfer among heme molecules.
About this Structure
2A3M is a Single protein structure of sequence from Desulfovibrio desulfuricans. Full crystallographic information is available from OCA.
Reference
Desulfovibrio desulfuricans G20 tetraheme cytochrome structure at 1.5 Angstrom and cytochrome interaction with metal complexes., Pattarkine MV, Tanner JJ, Bottoms CA, Lee YH, Wall JD, J Mol Biol. 2006 May 19;358(5):1314-27. Epub 2006 Mar 23. PMID:16580681
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