2qpz | pdb_00002qpz

Naphthalene 1,2-dioxygenase Rieske ferredoxin

spinqualitylabelsall models 2qpz, resolution 1.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 2qpz is a 1 chain structure with sequence from Pseudomonas putida. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.85Å Ligands: FES Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function NDOA_PSEPU Component of naphthalene dioxygenase (NDO) multicomponent enzyme system which catalyzes the incorporation of both atoms of molecular oxygen into naphthalene to form cis-naphthalene dihydrodiol. This subunit is a 2Fe-2S ferredoxin that transfers electrons to iron sulfur protein components (ISP). 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 iron-sulfur proteins have reduction potentials ranging from -150 to +400 mV. This enormous range of potentials was first proposed to be due to differing solvent exposure or even protein structure. However, the increasing number of available crystal structures for Rieske iron-sulfur proteins has shown this not to be the case. Colbert and colleagues proposed in 2000 that differences in the electrostatic environment, and not structural differences, of a Rieske proteins are responsible for the wide range of reduction potentials observed. Using computational simulation methods and the newly determined structure of Pseudomonas sp. NCIB 9816-4 naphthalene dioxygenase Rieske ferredoxin (NDO-F(9816-4)), we have developed a model to predict the reduction potential of Rieske proteins given only their crystal structure. The reduction potential of NDO-F(9816-4), determined using a highly oriented pyrolytic graphite electrode, was -150 +/- 2 mV versus the standard hydrogen electrode. The predicted reduction potentials correlate well with experimentally determined potentials. Given this model, the effect of protein mutations can be evaluated. Our results suggest that the reduction potential of new proteins can be estimated with good confidence from 3D structures of proteins. The structure of NDO-F(9816-4) is the most basic Rieske ferredoxin structure determined to date. Thus, the contributions of additional structural motifs and their effects on reduction potential can be compared with respect to this base structure. Determining Rieske cluster reduction potentials.,Brown EN, Friemann R, Karlsson A, Parales JV, Couture MM, Eltis LD, Ramaswamy S J Biol Inorg Chem. 2008 Aug 22. PMID:18719951 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dioxygenase 3D structures Ferredoxin 3D structures

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