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EC Number Crystallization (Commentary)
Display the reaction diagram Show all sequences drop vapor diffusion method, using 0.05 M KH2PO4 and 20% (w/v) PEG 8000
Display the reaction diagram Show all sequences of enzyme with and without uric acid at 2.0 and 2.2 A, respectively, and of the R204Q variant at 2.0 A resolution in the absence of uric acid. The variant structure is very similar to that of wild-type HpxO except for the conformation of Arg103, which interacts with FAD in the variant but not in the wild-type structure. The R204Q variant results in the uncoupling of nicotinamide adenine dinucleotide oxidation from uric acid hydroxylation. This suggests that Arg204 facilitates the deprotonation of uric acid, activating it for the oxygen transfer
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