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Crystallization and preliminary X-ray analysis of the complex of NADH and 3alpha-hydroxysteroid dehydrogenase from Pseudomonas sp. B-0831.

The NAD(P)(+)-dependent enzyme 3alpha-hydroxysteroid dehydrogenase (3alpha-HSD) catalyzes the reversible interconversion of hydroxyl and oxo groups at position 3 of the steroid nucleus. The complex of NADH and 3alpha-HSD from Pseudomonas sp. B-0831 was crystallized by the hanging-drop vapour-diffusion method. Refinement of crystallization conditions with microseeding improved the quality of the X-ray diffraction data to a resolution of 1.8 A. The crystals belonged to the orthorhombic space group P2(1)2(1)2(1), with unit-cell parameters a = 62.46, b = 82.25, c = 86.57 A, and contained two molecules, reflecting dimer formation of 3alpha-HSD, in the asymmetric unit.[1]

References

  1. Crystallization and preliminary X-ray analysis of the complex of NADH and 3alpha-hydroxysteroid dehydrogenase from Pseudomonas sp. B-0831. Kataoka, S., Nakamura, S., Ohkubo, T., Ueda, S., Uchiyama, S., Kobayashi, Y., Oda, M. Acta Crystallograph. Sect. F Struct. Biol. Cryst. Commun. (2006) [Pubmed]
 
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