1t3q
From Proteopedia
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Crystal structure of quinoline 2-Oxidoreductase from Pseudomonas Putida 86
Overview
The soil bacterium Pseudomonas putida 86 uses quinoline as a sole source, of carbon and energy. Quinoline 2-oxidoreductase (Qor) catalyzes the first, metabolic step converting quinoline to 2-oxo-1,2-dihydroquinoline. Qor is, a member of the molybdenum hydroxylases. The molybdenum ion is coordinated, by two ene-dithiolate sulfur atoms, two oxo-ligands, and a catalytically, crucial sulfido-ligand, whose position in the active site was, controversial. The 1.8 A resolution crystal structure of Qor indicates, that the sulfido-ligand occupies the equatorial position at the molybdenum, ion. The structural comparison of Qor with the allopurinol-inhibited, xanthine dehydrogenase from Rhodobacter capsulatus allows direct insight, into the mechanism of substrate recognition and the identification of, putative catalytic residues. The active site protein variants QorE743V and, QorE743D were analyzed to assess the catalytic role of E743.
About this Structure
1T3Q is a Protein complex structure of sequences from Pseudomonas putida with SO4, FES, FAD, MCN, SMO and GOL as ligands. Active as Quinoline 2-oxidoreductase, with EC number 1.3.99.17 Full crystallographic information is available from OCA.
Reference
Active site geometry and substrate recognition of the molybdenum hydroxylase quinoline 2-oxidoreductase., Bonin I, Martins BM, Purvanov V, Fetzner S, Huber R, Dobbek H, Structure. 2004 Aug;12(8):1425-35. PMID:15296736
Page seeded by OCA on Sun Nov 25 01:35:41 2007
Categories: Protein complex | Pseudomonas putida | Quinoline 2-oxidoreductase | Bonin, I. | Dobbek, H. | Fetzner, S. | Huber, R. | Martins, B.M. | Purvanov, V. | FAD | FES | GOL | MCN | SMO | SO4 | Mcd | Molybdenum | Qor
