2cb2

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Revision as of 19:20, 29 October 2007

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spinqualitylabelsall models 2cb2, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image

SULFUR OXYGENASE REDUCTASE FROM ACIDIANUS AMBIVALENS

Overview

Numerous microorganisms oxidize sulfur for energy conservation and, contribute to the global biogeochemical sulfur cycle. We have determined, the 1.7 angstrom-resolution structure of the sulfur oxygenase reductase, from the thermoacidophilic archaeon Acidianus ambivalens, which catalyzes, an oxygen-dependent disproportionation of elemental sulfur. Twenty-four, monomers form a large hollow sphere enclosing a positively charged, nanocompartment. Apolar channels provide access for linear sulfur species., A cysteine persulfide and a low-potential mononuclear non-heme iron site, ligated by a 2-His-1-carboxylate facial triad in a pocket of each subunit, constitute the active sites, accessible from the inside of the sphere. The, iron is likely the site of both sulfur oxidation and sulfur ... [(full description)]

About this Structure

2CB2 is a [Single protein] structure of sequence from [Acidianus ambivalens] with FE as [ligand]. Full crystallographic information is available from [OCA].

Reference

X-ray Structure of a self-compartmentalizing sulfur cycle metalloenzyme., Urich T, Gomes CM, Kletzin A, Frazao C, Science. 2006 Feb 17;311(5763):996-1000. PMID:16484493

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