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1: Acta Crystallogr D Biol Crystallogr. 2005 Apr;61(Pt 4):374-9. Epub 2005 Mar 24.Click here to read Links

Structure of zinc-independent sorbitol dehydrogenase from Rhodobacter sphaeroides at 2.4 A resolution.

Philippsen A, Schirmer T, Stein MA, Giffhorn F, Stetefeld J.

Division of Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, 4056 Basel, Switzerland. ansgar.philippsen@unibas.ch

Recombinant sorbitol dehydrogenase (SDH) from Rhodobacter sphaeroides has been crystallized in the absence of the cofactor NAD(H) and its structure determined to 2.4 A resolution using molecular replacement (refined R and R free factors of 18.8 and 23.8%, respectively). As expected from the sequence and shown by the conserved fold, SDH can be assigned to the short-chain dehydrogenase/reductase protein family. The cofactor NAD and the substrate sorbitol have been modelled into the structure and the active-site architecture, which displays the highly conserved catalytic tetrad of Asn-Ser-Tyr-Lys residues, is discussed in relation to the enzyme mechanism. This is the first structure of a bacterial SDH belonging to the SDR family.

PMID: 15805591 [PubMed - indexed for MEDLINE]

Structures reported by this article