Abstract
p47(phox) is a cytosolic component of the phagocyte NADPH oxidase, which is responsible for the production of the superoxide which kills invasive microorgamisms. A recombinant form of a histidine-tagged tandem SH3 domain of the p47(phox)-containing polybasic autoinhibited region was expressed in Escherichia coli and purified and crystallized by the sitting-drop vapour-diffusion method at 293 K using polyethylene glycol 6000 as a precipitant. Diffraction data were collected to 2.15 A resolution at 100 K using synchrotron radiation. The crystal belongs to space group P4(1)2(1)2 or P4(3)2(1)2, with unit-cell parameters a = 100.02, c = 44.94 A. The presence of one molecule per asymmetric unit gives a crystal volume per protein mass (V(M)) of 2.6 A(3) Da(-1) and a solvent content of 52% by volume.
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