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首页> 外文期刊>Acta crystallographica, Section F. Structural biology and crystallization communications >Crystallization and preliminary X-ray diffraction analysis of the TetR-family transcriptional repressor YhgD from Bacillus halodurans
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Crystallization and preliminary X-ray diffraction analysis of the TetR-family transcriptional repressor YhgD from Bacillus halodurans

机译:嗜盐芽孢杆菌的TetR家族转录阻遏物YhgD的结晶和初步X射线衍射分析

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摘要

YhgD is a member of the TetR-family transcription factors, which regulate genes encoding proteins involved in multidrug resistance, virulence, osmotic stress and pathogenicity. YhgD from the alkaliphilic bacterium Bacillus halodurans was cloned and overexpressed in Escherichia coli. YhgD (Bh2145) from B. halodurans is composed of 193 amino-acid residues with a molecular mass of 21 853 Da. YhgD was crystallized at 296 K using ethylene glycol as a precipitant by the sitting-drop vapour-diffusion method. The crystal diffracted to 1.9 angstrom resolution and belonged to the apparent triclinic space group P1, with unit-cell parameters a = 37.22, b = 47.85, c = 54.15 angstrom, alpha = 92.75, beta = 107.9, gamma = 90.27 degrees. The asymmetric unit is likely to contain two molecules of monomeric YhgD, giving a crystal volume per mass (V-M) of 2.05 angstrom(3) Da(-1) and a solvent content of 40.2%.
机译:YhgD是TetR家族转录因子的成员,该因子调节编码与多药耐药性,毒力,渗透压和致病性有关的蛋白质的基因。来自嗜碱细菌嗜碱性芽孢杆菌的YhgD被克隆并在大肠杆菌中过表达。嗜盐芽孢杆菌的YhgD(Bh2145)由193个氨基酸残基组成,分子量为21 853 Da。通过坐滴蒸气扩散法,使用乙二醇作为沉淀剂,将YhgD于296 K结晶。晶体衍射到1.9埃分辨率,并属于表观三斜空间群P1,单位晶格参数a = 37.22,b = 47.85,c = 54.15埃,α= 92.75,β= 107.9,γ= 90.27度。不对称单元很可能包含两个分子的单体YhgD,每质量的晶体体积(V-M)为2.05埃(3)Da(-1),溶剂含量为40.2%。

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