The RNA polymerase factory: a robotic in vitro assembly platform for high-throughput production of recombinant protein complexes.

The RNA polymerase factory: a robotic in vitro assembly platform for high-throughput production of recombinant protein complexes.
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DOI:
10.1093/nar/gkm1044
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发表时间:
2008-01
影响因子:
14.9
通讯作者:
Weinzierl RO
Weinzierl RO
中科院分区:
生物学2区
文献类型:
--
作者:
Nottebaum S;Tan L;Trzaska D;Carney HC;Weinzierl RO

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大型蛋白质复合物(如RNA聚合酶(RNAP))的深入结构/功能分析需要一个实验平台,该平台能够在体外条件下以可重现的方式大量组装此类酶的变体。在这里,我们描述了一个精简和集成的协议,用于组装重组古细菌RNAP在高通量96孔格式。该程序的所有方面,包括重新设计的表达质粒的构建、自动化蛋白提取/体外组装方法的开发和活性测定,都特别适合在机器人平台上实施。优化的策略允许在24 h内进行96个重组RNAP(包括野生型和突变型变体)的平行组装和活性测定,而很少或没有人为干预。我们证明了该系统的高通量潜力,通过评估的RNAP桥阻碍使用饱和诱变的一个单一的氨基酸位置的侧链的要求。
The in-depth structure/function analysis of large protein complexes, such as RNA polymerases (RNAPs), requires an experimental platform capable of assembling variants of such enzymes in large numbers in a reproducible manner under defined in vitro conditions. Here we describe a streamlined and integrated protocol for assembling recombinant archaeal RNAPs in a high-throughput 96-well format. All aspects of the procedure including construction of redesigned expression plasmids, development of automated protein extraction/in vitro assembly methods and activity assays were specifically adapted for implementation on robotic platforms. The optimized strategy allows the parallel assembly and activity assay of 96 recombinant RNAPs (including wild-type and mutant variants) with little or no human intervention within 24 h. We demonstrate the high-throughput potential of this system by evaluating the side-chain requirements of a single amino acid position of the RNAP Bridge Helix using saturation mutagenesis.
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