Crystal Structure of the Bacillus Subtilis Phosphodiesterase Phod Reveals an Iron and Calcium-Containing Active Site.Rodriguez, F., Lillington, J., Johnson, S., Timmel, C.R., Lea, S.M., Berks, B.C.
(2014) J Biol Chem 289: 30889
- PubMed: 25217636
- DOI: https://doi.org/10.1074/jbc.M114.604892
- Primary Citation of Related Structures:
- PubMed Abstract:
The PhoD family of extra-cytoplasmic phosphodiesterases are among the most commonly occurring bacterial phosphatases. The exemplars for this family are the PhoD protein of Bacillus subtilis and the phospholipase D of Streptomyces chromofuscus. We present the crystal structure of B. subtilis PhoD. PhoD is most closely related to purple acid phosphatases (PAPs) with both types of enzyme containing a tyrosinate-ligated Fe(3+) ion. However, the PhoD active site diverges from that found in PAPs and uses two Ca(2+) ions instead of the single extra Fe(2+), Mn(2+), or Zn(2+) ion present in PAPs. The PhoD crystals contain a phosphate molecule that coordinates all three active site metal ions and that is proposed to represent a product complex. A C-terminal helix lies over the active site and controls access to the catalytic center. The structure of PhoD defines a new phosphatase active site architecture based on Fe(3+) and Ca(2+) ions.
From the Department of Biochemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, email@example.com.