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. 2001 Dec;57(Pt 12):1900-2.
doi: 10.1107/s0907444901015852. Epub 2001 Nov 21.

Crystallization and preliminary X-ray analysis of the periplasmic nitrate reductase (NapA-NapB complex) from Rhodobacter sphaeroides f. sp. denitrificans

D Pignol  1 , J M Adriano, J C Fontecilla-Camps, M Sabaty
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Crystallization and preliminary X-ray analysis of the periplasmic nitrate reductase (NapA-NapB complex) from Rhodobacter sphaeroides f. sp. denitrificans

D Pignol et al. Acta Crystallogr D Biol Crystallogr. 2001 Dec.

Abstract

The periplasmic nitrate reductase of Rhodobacter sphaeroides f. sp. denitrificans is a heterodimer responsible for the first step of reduction in the denitrification process by the conversion of nitrate to nitrite. It consists of a 91 kDa molybdenum-containing catalytic subunit (NapA) and a 17 kDa dihaem cytochrome c (NapB). Crystals of the NapA-NapB complex were obtained by the vapour-diffusion method using ammonium sulfate as precipitant. They belong to the P6(1)22 space group, with unit-cell parameters a = b = 151.9, c = 255.8 A, and contain a single complex in the asymmetric unit. A complete native data set was collected at a synchrotron source to 3.1 A resolution.

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