2jcd
From Proteopedia
|
STRUCTURE OF THE N-OXYGENASE AURF FROM STREPTOMYCES THIOLUTEUS
Overview
Nitro groups are found in a number of bioactive compounds. Most of them, arise by a stepwise mono-oxygenation of amino groups. One of the involved, enzymes is AurF participating in the biosynthesis of aureothin. Its, structure was established at 2.1 A resolution showing a homodimer with a, binuclear manganese cluster. The enzyme preparation, which yielded the, analyzed crystals, showed activity using in vitro and in vivo assays., Chain fold and cluster are homologous with ribonucleotide reductase, subunit R2 and related enzymes. The two manganese ions and an iron content, of about 15% were established by anomalous X-ray diffraction. A comparison, of the cluster with more common di-iron clusters suggested an additional, histidine in the coordination sphere to cause the preference for manganese, over iron. There is no oxo-bridge. The substrate p-amino-benzoate was, modeled into the active center. The model is supported by mutant activity, measurements. It shows the geometry of the reaction and explains the, established substrate spectrum.
About this Structure
2JCD is a Single protein structure of sequence from Streptomyces thioluteus with MN and EDO as ligands. Structure known Active Site: AC1. Full crystallographic information is available from OCA.
Reference
Structure and Action of the N-oxygenase AurF from Streptomyces thioluteus., Zocher G, Winkler R, Hertweck C, Schulz GE, J Mol Biol. 2007 Jun 9;. PMID:17765264
Page seeded by OCA on Mon Nov 5 18:51:31 2007
