Crystallization and preliminary X-ray analysis of bacteriophage T4 deoxynucleotide kinase.
T4 deoxynucleotide kinase catalyzes the phosphorylation of 5-hydroxymethyldeoxycytidylate, dTMP and dGMP while excluding dCMP and dAMP. In order to understand the mechanism of this remarkable specificity, the enzyme was over-expressed in Escherichia coli, purified and crystallized for X-ray diffraction analysis. The crystals belong to the monoclinic space group C2 with cell dimensions a = 155.2, b = 58.5, c = 75.7 A, beta = 108.1 degrees. There are two protein monomers in the asymmetric unit related by a twofold axis. Diffraction data to 2.0 A resolution have been collected.
European Molecular Biology Laboratory, Hamburg, Germany.
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Sebastiao
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Obmolova
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Brush
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Bessman
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Teplyakov