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Bagautdinov, B. et al.

Purification, crystallization and preliminary crystallographic analysis of the biotin-protein ligase from Pyrococcus horikoshii OT3.

Biotin-protein ligase is an enzyme that catalyzes the ATP-dependent biotinylation of a specific lysine residue in acetyl-CoA carboxylase. The biotin-protein ligase from Pyrococcus horikoshii OT3 has been cloned, overexpressed and purified. Crystallization was performed by the microbatch method or the vapour-diffusion method using PEG 2000 as a precipitant at 295 K. X-ray diffraction data have been collected to 1.6 A resolution from a native crystal and to 1.55 A resolution from a selenomethionine-derivative crystal for multiple anomalous dispersion phasing using synchrotron radiation at 100 K. The native crystal belongs to the monoclinic space group P2(1), with unit-cell parameters a = 38.601, b = 78.264, c = 70.147 A, beta = 101.48 degrees. Assuming a homodimer per asymmetric unit gives a VM value of 2.14 A3 Da(-1) and a solvent content of 42.5%. Cocrystals with biotin, ADP and biotinyl-5'-AMP were prepared and diffraction data sets were collected to 1.6, 1.6 and 1.45 A resolution, respectively.[1]

References

Purification, crystallization and preliminary crystallographic analysis of the biotin-protein ligase from Pyrococcus horikoshii OT3. Bagautdinov, B., Kuroishi, C., Sugahara, M., Kunishima, N. Acta Crystallograph. Sect. F Struct. Biol. Cryst. Commun. (2005) [Pubmed]

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