1b0k | pdb_00001b0k

S642A:FLUOROCITRATE COMPLEX OF ACONITASE

spinqualitylabelsall models 1b0k, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1b0k is a 1 chain structure with sequence from Pig. This structure supersedes the now removed PDB entry 1as9. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: FLC, O, SF4 Activity: Aconitate hydratase, with EC number 4.2.1.3 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum Function [ACON_PIG] Catalyzes the isomerization of citrate to isocitrate via cis-aconitate. 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 The crystal structure of the S642A mutant of mitochondrial aconitase (mAc) with citrate bound has been determined at 1.8 A resolution and 100 K to capture this binding mode of substrates to the native enzyme. The 2.0 A resolution, 100 K crystal structure of the S642A mutant with isocitrate binding provides a control, showing that the Ser --> Ala replacement does not alter the binding of substrates in the active site. The aconitase mechanism requires that the intermediate product, cis-aconitate, flip over by 180 degrees about the C alpha-C beta double bond. Only one of these two alternative modes of binding, that of the isocitrate mode, has been previously visualized. Now, however, the structure revealing the citrate mode of binding provides direct support for the proposed enzyme mechanism. The mechanism of aconitase: 1.8 A resolution crystal structure of the S642a:citrate complex.,Lloyd SJ, Lauble H, Prasad GS, Stout CD Protein Sci. 1999 Dec;8(12):2655-62. PMID:10631981 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Aconitase

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