Structural highlights
2nuk is a 1 chain structure with sequence from "rhodococcus_capsulatus"_molisch_1907 "rhodococcus capsulatus" molisch 1907. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
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| Ligands: | |
| Related: | 2num, 2nve, 2nvf, 2nvg, 2nwf |
| Gene: | petA, fbcF ("Rhodococcus capsulatus" Molisch 1907) |
| Activity: | Ubiquinol--cytochrome-c reductase, with EC number 1.10.2.2 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum |
Function
[UCRI_RHOSH] Component of the ubiquinol-cytochrome c reductase complex (complex III or cytochrome b-c1 complex), which is a respiratory chain that generates an electrochemical potential coupled to ATP synthesis.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The Rieske [2Fe-2S] iron-sulfur protein of cytochrome bc(1) functions as the initial electron acceptor in the rate-limiting step of the catalytic reaction. Prior studies have established roles for a number of conserved residues that hydrogen bond to ligands of the [2Fe-2S] cluster. We have constructed site-specific variants at two of these residues, measured their thermodynamic and functional properties, and determined atomic resolution X-ray crystal structures for the native protein at 1.2 A resolution and for five variants (Ser-154-->Ala, Ser-154-->Thr, Ser-154-->Cys, Tyr-156-->Phe, and Tyr-156-->Trp) to resolutions between 1.5 A and 1.1 A. These structures and complementary biophysical data provide a molecular framework for understanding the role hydrogen bonds to the cluster play in tuning thermodynamic properties, and hence the rate of this bioenergetic reaction. These studies provide a detailed structure-function dissection of the role of hydrogen bonds in tuning the redox potentials of [2Fe-2S] clusters.
Atomic resolution structures of rieske iron-sulfur protein: role of hydrogen bonds in tuning the redox potential of iron-sulfur clusters.,Kolling DJ, Brunzelle JS, Lhee S, Crofts AR, Nair SK Structure. 2007 Jan;15(1):29-38. PMID:17223530[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Kolling DJ, Brunzelle JS, Lhee S, Crofts AR, Nair SK. Atomic resolution structures of rieske iron-sulfur protein: role of hydrogen bonds in tuning the redox potential of iron-sulfur clusters. Structure. 2007 Jan;15(1):29-38. PMID:17223530 doi:http://dx.doi.org/10.1016/j.str.2006.11.012
