1tb3

Crystal Structure Analysis of Recombinant Rat Kidney Long-chain Hydroxy Acid Oxidase

spinqualitylabelsall models 1tb3, resolution 2.30Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1tb3 is a 8 chain structure with sequence from Rattus norvegicus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.3Å Ligands: ACY, FMN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function HAOX2_RAT Catalyzes the oxidation of L-alpha-hydroxy acids as well as, more slowly, that of L-alpha-amino acids. 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 Long chain hydroxy acid oxidase (LCHAO) is a member of an FMN-dependent enzyme family that oxidizes L-2-hydroxy acids to ketoacids. LCHAO is a peroxisomal enzyme, and the identity of its physiological substrate is unclear. Mandelate is the most efficient substrate known and is commonly used in the test tube. LCHAO differs from most family members in that one of the otherwise invariant active site residues is a phenylalanine (Phe23) instead of a tyrosine. We now report the crystal structure of LCHAO. It shows the same beta8alpha8 TIM barrel structure as other structurally characterized family members, e.g., spinach glycolate oxidase (GOX) and the electron transferases yeast flavocytochrome b2 (FCB2) and Pseudomonas putida mandelate dehydrogenase (MDH). Loop 4, which is mobile in other family members, is visible in part. An acetate ion is present in the active site. The flavin interacts with the protein in the same way as in the electron transferases, and not as in GOX, an unexpected observation. An interpretation is proposed to explain this difference between GOX on one hand and FCB2 and LCHAO on the other hand, which had been proposed to arise from the differences between family members in their reactivity with oxygen. A comparison of models of the substrate bound to various published structures suggests that the very different reactivity with mandelate of LCHAO, GOX, FCB2, and MDH cannot be rationalized by a hydride transfer mechanism. Crystal structure analysis of recombinant rat kidney long chain hydroxy acid oxidase.,Cunane LM, Barton JD, Chen ZW, Le KH, Amar D, Lederer F, Mathews FS Biochemistry. 2005 Feb 8;44(5):1521-31. PMID:15683236 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Glycolate oxidase 3D structures

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