2ig9 | pdb_00002ig9

Structure of a full-length Homoprotocatechuate 2,3-Dioxygenase from B. fuscum in a new spacegroup.

spinqualitylabelsall models 2ig9, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 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. Method: X-ray diffraction, Resolution 1.9Å Ligands: CA, CL, FE2, GOL Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q45135_9MICO Evolutionary Conservation 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 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Dioxygenase 3D structures

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