The Reaction Cycle of Isopenicillin N Synthase Observed by X-Ray Diffraction.
Burzlaff, N.I., Rutledge, P.J., Clifton, I.J., Hensgens, C.M.H., Pickford, M., Adlington, R.M., Roach, P.L., Baldwin, J.E.(1999) Nature 401: 721
- PubMed: 10537113 
- DOI: 10.1038/44400
- Primary Citation of Related Structures:  
1QIQ, 1QJE, 1QJF - PubMed Abstract: 
Isopenicillin N synthase (IPNS), a non-haem iron-dependent oxidase, catalyses the biosynthesis of isopenicillin N (IPN), the precursor of all penicillins and cephalosporins. The key steps in this reaction are the two iron-dioxygen-mediated ring closures of the tripeptide delta-(L-alpha-aminoadipoyl)-L-cysteinyl-D-valine (ACV) ...