5yb7

L-Amino acid oxidase/monooxygenase from Pseudomonas sp. AIU 813 - L-ornithine complex

spinqualitylabelsall models 5yb7, resolution 2.00Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5yb7 is a 4 chain structure with sequence from Pseudomonas sp. AIU 813. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2Å Ligands: FAD, ORN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function W6JQJ6_9PSED Publication Abstract from PubMed l-Amino acid oxidase/monooxygenase from Pseudomonas sp. AIU 813 (l-AAO/MOG) catalyzes both the oxidative deamination and oxidative decarboxylation of the alpha-group of l-Lys to produce a keto acid and amide, respectively. l-AAO/MOG exhibits limited specificity for l-amino acid substrates with a basic side chain. We previously determined its ligand-free crystal structure and identified a key residue for maintaining the dual activities. Here, we determined the structures of l-AAO/MOG complexed with l-Lys, l-ornithine, and l-Arg and revealed its substrate recognition. Asp238 is located at the ceiling of a long hydrophobic pocket and forms a strong interaction with the terminal, positively charged group of the substrates. A mutational analysis on the D238A mutant indicated that the interaction is critical for substrate binding but not for catalytic control between the oxidase/monooxygenase activities. The catalytic activities of the D238E mutant unexpectedly increased, while the D238F mutant exhibited altered substrate specificity to long hydrophobic substrates. In the ligand-free structure, there are two channels connecting the active site and solvent, and a short region located at the dimer interface is disordered. In the l-Lys complex structure, a loop region is displaced to plug the channels. Moreover, the disordered region in the ligand-free structure forms a short helix in the substrate complex structures and creates the second binding site for the substrate. It is assumed that the amino acid substrate enters the active site of l-AAO/MOG through this route. Database: The atomic coordinates and structure factors (codes 5YB6, 5YB7, and 5YB8) have been deposited in the Protein Data Bank (https://wwpdb.org/). EC numbers: 1.4.3.2 (l-amino acid oxidase), 1.13.12.2 (lysine 2-monooxygenase). Ligand complex structures of l-amino acid oxidase/monooxygenase from Pseudomonas sp. AIU 813 and its conformational change.,Im D, Matsui D, Arakawa T, Isobe K, Asano Y, Fushinobu S FEBS Open Bio. 2018 Feb 8;8(3):314-324. doi: 10.1002/2211-5463.12387. eCollection, 2018 Mar. PMID:29511608 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Amino acid oxidase 3D structures

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