Abstract

Uracil-DNA glycosylase (UDG) is a DNA-repair enzyme involved in the removal of uracil from DNA. The Atlantic cod UDG (cUDG) possesses typical cold-adaptation features, with higher catalytic efficiency and lower thermal stability than the mammalian counterparts. cUDG has been crystallized by the vapour-diffusion method using sodium citrate as the precipitant at pH 7.5. The crystals are monoclinic and belong to space group P2(1), with unit-cell parameters a = 68.58, b = 67.19, c = 68.64 A, beta = 119.85 degrees. There are two molecules in the asymmetric unit, with a corresponding V(M) value of 2.71 A(3) Da(-1) and a solvent content of 54.7%. Synchrotron diffraction data have been collected to 1.9 A resolution using cryogenic conditions (120 K).

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