Download MendeleyStructure of a coenzyme A pyrophosphatase from Deinococcus radiodurans: a member of the Nudix family.
Kang, L.W., Gabelli, S.B., Bianchet, M.A., Xu, W.L., Bessman, M.J., Amzel, L.M.(2003) J Bacteriol 185: 4110-4118
- PubMed: 12837785
- DOI: https://doi.org/10.1128/JB.185.14.4110-4118.2003
- Primary Citation of Related Structures:
1NQY, 1NQZ - PubMed Abstract:
Gene Dr1184 from Deinococcus radiodurans codes for a Nudix enzyme (DR-CoAse) that hydrolyzes the pyrophosphate moiety of coenzyme A (CoA). Nudix enzymes with the same specificity have been found in yeast, humans, and mice. The three-dimensional structure of DR-CoAse, the first of a Nudix hydrolase with this specificity, reveals that this enzyme contains, in addition to the fold observed in other Nudix enzymes, insertions that are characteristic of a CoA-hydrolyzing Nudix subfamily. The structure of the complex of the enzyme with Mg(2+), its activating cation, reveals the position of the catalytic site. A helix, part of the N-terminal insertion, partially occludes the binding site and has to change its position to permit substrate binding. Comparison of the structure of DR-CoAse to those of other Nudix enzymes, together with the location in the structure of the sequence characteristic of CoAses, suggests a mode of binding of the substrate to the enzyme that is compatible with all available data.
Organizational Affiliation:
Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA.
