Download MendeleyMalonate-bound structure of the glycerophosphodiesterase from Enterobacter aerogenes (GpdQ) and characterization of the native Fe2+ metal-ion preference.
Jackson, C.J., Hadler, K.S., Carr, P.D., Oakley, A.J., Yip, S., Schenk, G., Ollis, D.L.(2008) Acta Crystallogr Sect F Struct Biol Cryst Commun 64: 681-685
- PubMed: 18678932
- DOI: https://doi.org/10.1107/S1744309108017600
- Primary Citation of Related Structures:
2ZO9, 2ZOA - PubMed Abstract:
The structure of a malonate-bound form of the glycerophosphodiesterase from Enterobacter aerogenes, GpdQ, has been refined at a resolution of 2.2 A to a final R factor of 17.1%. The structure was originally solved to 2.9 A resolution using SAD phases from Zn2+ metal ions introduced into the active site of the apoenzyme [Jackson et al. (2007), J. Mol. Biol. 367, 1047-1062]. However, the 2.9 A resolution was insufficient to discern significant details of the architecture of the binuclear metal centre that constitutes the active site. Furthermore, kinetic analysis revealed that the enzyme lost a significant amount of activity in the presence of Zn2+, suggesting that it is unlikely to be a catalytically relevant metal ion. In this communication, a higher resolution structure of GpdQ is presented in which malonate is visibly coordinated in the active site and analysis of the native metal-ion preference is presented using atomic absorption spectroscopy and anomalous scattering. Catalytic implications of the structure and its Fe2+ metal-ion preference are discussed.
Organizational Affiliation:
Research School of Chemistry, Australian National University, Australia.
