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B. Berks, M. Page, D. Richardson, A. Reilly, A. Cavill, Fenno Outen, S. Ferguson (1995)
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The periplasmic nitrate reductase from Cupriavidus necator (also known as Ralstonia eutropha) is a heterodimer that is able to reduce nitrate to nitrite. It comprises a 91 kDa catalytic subunit (NapA) and a 17 kDa subunit (NapB) that is involved in electron transfer. The larger subunit contains a molybdenum active site with a bis‐molybdopterin guanine dinucleotide cofactor as well as one (4Fe–4S) cluster, while the small subunit is a di‐haem c‐type cytochrome. Crystals of the oxidized form of this enzyme were obtained using polyethylene glycol 3350 as precipitant. A single crystal grown at the High Throughput Crystallization Laboratory of the EMBL in Grenoble diffracted to beyond 1.5 Å at the ESRF (ID14‐1), which is the highest resolution reported to date for a nitrate reductase. The unit‐cell parameters are a = 142.2, b = 82.4, c = 96.8 Å, β = 100.7°, space group C2, and one heterodimer is present per asymmetric unit.
Acta Crystallographica Section F – Wiley
Published: Jun 1, 2007
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