3qe3

Publication Abstract from PubMed

The X-ray crystal structure of sheep liver sorbitol dehydrogenase (slSDH) has been determined using the crystal structure of human sorbitol dehydrogenase (hSDH) as a molecular-replacement model. slSDH crystallized in space group I222 with one monomer in the asymmetric unit. A conserved tetramer that superposes well with that seen in hSDH (despite belonging to a different space group) and obeying the 222 crystal symmetry is seen in slSDH. An acetate molecule is bound in the active site, coordinating to the active-site zinc through a water molecule. Glycerol, a substrate of slSDH, also occupies the substrate-binding pocket together with the acetate designed by nature to fit large polyol substrates. The substrate-binding pocket is seen to be in close proximity to the tetramer interface, which explains the need for the structural integrity of the tetramer for enzyme activity. Small-angle X-ray scattering was also used to identify the quaternary structure of the tetramer of slSDH in solution.

X-ray crystal structure and small-angle X-ray scattering of sheep liver sorbitol dehydrogenase.,Yennawar H, Moller M, Gillilan R, Yennawar N Acta Crystallogr D Biol Crystallogr. 2011 May;67(Pt 5):440-6. Epub 2011 Apr 13. PMID:21543846^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.