|1e08, 1 NMR models ()|
|Ligands:||, , , , , ,|
|Related:|| 1hfe, 1dvh
STRUCTURAL MODEL OF THE [FE]-HYDROGENASE/CYTOCHROME C553 COMPLEX COMBINING NMR AND SOFT-DOCKING
Fe-hydrogenase is a 54-kDa iron-sulfur enzyme essential for hydrogen cycling in sulfate-reducing bacteria. The x-ray structure of Desulfovibrio desulfuricans Fe-hydrogenase has recently been solved, but structural information on the recognition of its redox partners is essential to understand the structure-function relationships of the enzyme. In the present work, we have obtained a structural model of the complex of Fe-hydrogenase with its redox partner, the cytochrome c(553), combining docking calculations and NMR experiments. The putative models of the complex demonstrate that the small subunit of the hydrogenase has an important role in the complex formation with the redox partner; 50% of the interacting site on the hydrogenase involves the small subunit. The closest contact between the redox centers is observed between Cys-38, a ligand of the distal cluster of the hydrogenase and Cys-10, a ligand of the heme in the cytochrome. The electron pathway from the distal cluster of the Fe-hydrogenase to the heme of cytochrome c(553) was investigated using the software Greenpath and indicates that the observed cysteine/cysteine contact has an essential role. The spatial arrangement of the residues on the interface of the complex is very similar to that already described in the ferredoxin-cytochrome c(553) complex, which therefore, is a very good model for the interacting domain of the Fe-hydrogenase-cytochrome c(553).
Structural model of the Fe-hydrogenase/cytochrome c553 complex combining transverse relaxation-optimized spectroscopy experiments and soft docking calculations., Morelli X, Czjzek M, Hatchikian CE, Bornet O, Fontecilla-Camps JC, Palma NP, Moura JJ, Guerlesquin F, J Biol Chem. 2000 Jul 28;275(30):23204-10. PMID:10748163
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1e08 is a 3 chain structure with sequence from Desulfovibrio desulfuricans and Desulfovibrio vulgaris. The March 2009 RCSB PDB Molecule of the Month feature on Hydrogenase by David Goodsell is 10.2210/rcsb_pdb/mom_2009_3. Full experimental information is available from OCA.
- Morelli X, Czjzek M, Hatchikian CE, Bornet O, Fontecilla-Camps JC, Palma NP, Moura JJ, Guerlesquin F. Structural model of the Fe-hydrogenase/cytochrome c553 complex combining transverse relaxation-optimized spectroscopy experiments and soft docking calculations. J Biol Chem. 2000 Jul 28;275(30):23204-10. PMID:10748163 doi:10.1074/jbc.M909835199
- Morelli X, Dolla A, Czjzek M, Palma PN, Blasco F, Krippahl L, Moura JJ, Guerlesquin F. Heteronuclear NMR and soft docking: an experimental approach for a structural model of the cytochrome c553-ferredoxin complex. Biochemistry. 2000 Mar 14;39(10):2530-7. PMID:10704202