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1.  Crystallization and preliminary X-ray diffraction analysis of the electron-transfer complex between the terminal oxygenase component and ferredoxin in the Rieske non-haem iron oxygenase system carbazole 1,9a-dioxygenase 
The electron-transfer complex between the terminal oxygenase and ferredoxin of carbazole 1,9a-dioxygenase was crystallized and diffraction data were collected to 1.90 Å resolution.
Carbazole 1,9a-dioxygenase, which consists of an oxygenase component (CARDO-O) and the electron-transport components ferredoxin (CARDO-F) and ferredoxin reductase (CARDO-R), catalyzes dihydroxylation at the C1 and C9a positions of carbazole. The electron-transport complex between CARDO-­O and CARDO-F crystallizes at 293 K using hanging-drop vapour diffusion with the precipitant PEG MME 2000 (type I crystals) or PEG 3350 (type II). Blossom-shaped crystals form from a pile of triangular plate-shaped crystals. The type I crystal diffracts to a maximum resolution of 1.90 Å and belongs to space group P21, with unit-cell parameters a = 97.1, b = 89.8, c = 104.9 Å, α = γ = 90, β = 103.8°. Diffraction data for the type I crystal gave an overall R merge of 8.0% and a completeness of 100%. Its V M value is 2.63 Å3 Da−1, indicating a solvent content of 53.2%.
doi:10.1107/S1744309105014557
PMCID: PMC1952320  PMID: 16511100
angular dioxygenases; carbazole; electron-transfer complexes; Rieske non-haem iron oxygenase systems; Rieske-type ferredoxins; Rieske-type proteins

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