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Preparation, crystallization and preliminary crystallographic analysis of old yellow enzyme from Trypanosoma cruzi

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Old yellow enzyme (OYE) is an NADPH oxidoreductase that contains a flavin mononucleotide as a prosthetic group. The OYE from Trypanosoma cruzi, which produces prostaglandin F, a potent mediator of various physiological and pathological processes, from prostaglandin H2. The protein was recombinantly expressed and purified from Escherichia coli and was crystallized using the hanging‐drop vapour‐diffusion method. The crystal belongs to the monoclinic space group P21, with unit‐cell parameters a = 56.3, b = 78.8, c = 78.8 Å, β = 93.4° and two molecules per asymmetric unit. The crystals were suitable for X‐ray crystallographic studies and diffracted to 1.70 Å resolution. A Patterson search method is in progress using the structure of OYE from Pseudomonas putida as a starting model.
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Keywords: NADPH oxidoreductases; old yellow enzyme

Document Type: Research Article

Publication date: October 1, 2007

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