2ig9 is a 4 chain structure with sequence from Brevibacterium fuscum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
We report the structures of three intermediates in the O2 activation and insertion reactions of an extradiol ring-cleaving dioxygenase. A crystal of Fe2+-containing homoprotocatechuate 2,3-dioxygenase was soaked in the slow substrate 4-nitrocatechol in a low O2 atmosphere. The x-ray crystal structure shows that three different intermediates reside in different subunits of a single homotetrameric enzyme molecule. One of these is the key substrate-alkylperoxo-Fe2+ intermediate, which has been predicted, but not structurally characterized, in an oxygenase. The intermediates define the major chemical steps of the dioxygenase mechanism and point to a general mechanistic strategy for the diverse 2-His-1-carboxylate enzyme family.
Crystal structures of Fe2+ dioxygenase superoxo, alkylperoxo, and bound product intermediates.,Kovaleva EG, Lipscomb JD Science. 2007 Apr 20;316(5823):453-7. PMID:17446402[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
