Crystal Structure of a Clavaminate Synthase-Fe(II) -2-Oxoglutarate-Substrate-No Complex: Evidence for Metal Centered Rearrangements
Zhang, Z.H., Ren, J., Harlos, K., McKinnon, C.H., Clifton, I.J., Schofield, C.J.(2002) FEBS Lett 517: 7
- PubMed: 12062399
- DOI: https://doi.org/10.1016/s0014-5793(02)02520-6
- Primary Citation of Related Structures:
1GVG - PubMed Abstract:
Clavaminate synthase (CAS), a 2-oxoglutarate (2OG) dependent dioxygenase, catalyses three steps in the biosynthesis of clavulanic acid. Crystals of CAS complexed with Fe(II), 2OG and deoxyguanidinoproclavaminate were exposed to nitric oxide (NO) acting as a dioxygen analogue. Prior to exposure with NO, the active site Fe(II) is octahedrally coordinated by a water molecule, the 2-oxo and 1-carboxylate groups of 2OG, and the side-chains of an aspartyl and two histidinyl residues. NO binds to the position previously occupied by the 2OG 1-carboxylate concomitant with rearrangement of the latter to the position previously occupied by the displaced water.
Organizational Affiliation:
The Oxford Centre for Molecular Sciences and The Dyson Perrins Laboratory, The Department of Chemistry, South Parks Road, Oxford, UK.