3dxw

The crystal structure of alpha-amino-epsilon-caprolactam racemase from Achromobacter obae complexed with epsilon caprolactam

spinqualitylabelsall models 3dxw, resolution 2.41Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 3dxw is a 2 chain structure with sequence from Achromobacter obae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.41Å Ligands: ICC, PLP Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function ACLR_ACHOB catalyzes the interconversion of L-alpha-amino-epsilon-caprolactam and D-alpha-amino-epsilon-caprolactam. 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 Alpha-amino-epsilon-caprolactam (ACL) racemase (ACLR) from Achromobacter obae catalyzes the interconversion of l- and d-ACL. ACLR belongs to the fold-type I group of pyridoxal 5'-phosphate (PLP) dependent enzymes. In this study, the first crystal structures of a fold-type I racemase are solved for the native form and epsilon-caprolactam-complexed form of ACLR at 2.21 and 2.40 A resolution, respectively. Based on the location of epsilon-caprolactam in the complex structure, the substrate-binding site is assigned between Trp49 and Tyr137. The carboxyl group of Asp210 is a reasonable candidate that recognizes the nitrogen atom of a lactam or amide in the substrate. Based on a structural comparison with fold-type III alanine racemase, Tyr137 is potentially the acid/base catalytic residue that is essential for the two-base racemization mechanism. The overall structure of ACLR is similar to that of fold-type I enzymes. A structural comparison with these enzymes explains the different reaction specificities. The novel structure of a pyridoxal 5'-phosphate-dependent fold-type I racemase, alpha-amino-epsilon-caprolactam racemase from Achromobacter obae.,Okazaki S, Suzuki A, Mizushima T, Kawano T, Komeda H, Asano Y, Yamane T Biochemistry. 2009 Feb 10;48(5):941-50. PMID:19146406 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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