海洋热藻CheA P3-P4-P5结构域与CheW配合物的结晶及初步x射线晶体学分析。

Sangyoun Park, Keon Young Kim, Sunmin Kim, Brian R Crane
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引用次数: 0

摘要

CheA-CheW复合体在细菌趋化信号转导中起关键作用,通过偶联到趋化受体,启动向反应调节因子的磷转移。CheA (P3-P4-P5结构域)和CheW在大肠杆菌中过表达,并以磷酸二氢铵作为沉淀剂在298 K下结晶为络合物。用同步辐射在100 K下采集到~8 Å分辨率的x射线衍射数据。晶体属于I222或I2(1)2(1)2(1)空间群,晶胞参数a = 184.2, b = 286.4, c = 327.7 Å。不对称单元可能包含6到10个CheA-CheW分子。
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Crystallization and preliminary X-ray crystallographic analysis of Thermotoga maritima CheA P3-P4-P5 domains in complex with CheW.

The CheA-CheW complex plays a key role in bacterial chemotaxis signal transduction by initiating phosphotransfer to response regulators via coupling to the chemoreceptors. CheA (P3-P4-P5 domains) and CheW from Thermotoga maritima were overexpressed in Escherichia coli and crystallized as a complex at 298 K using ammonium dihydrogen phosphate as a precipitant. X-ray diffraction data were collected to ~8 Å resolution at 100 K using synchrotron radiation. The crystal belonged to space group I222 or I2(1)2(1)2(1), with unit-cell parameters a = 184.2, b = 286.4, c = 327.7 Å. The asymmetric unit may contain six to ten CheA-CheW molecules.

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期刊介绍: Acta Crystallographica Section F is a rapid structural biology communications journal. Articles on any aspect of structural biology, including structures determined using high-throughput methods or from iterative studies such as those used in the pharmaceutical industry, are welcomed by the journal. The journal offers the option of open access, and all communications benefit from unlimited free use of colour illustrations and no page charges. Authors are encouraged to submit multimedia content for publication with their articles. Acta Cryst. F has a dedicated online tool called publBio that is designed to make the preparation and submission of articles easier for authors.
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