Canals Albert, Blanco Alexandre G, Coll Miquel
Institute for Research in Biomedicine, Barcelona, Spain.
Transcription. 2012 Jul-Aug;3(4):160-4. doi: 10.4161/trns.20444. Epub 2012 Jul 1.
Transcription factors modulate gene expression by distinct, barely understood mechanisms. The crystal structure of a bacterial transcription subcomplex comprising the effector domain of factor PhoB, its target DNA and the σ4 domain of the RNA polymerase σ70 subunit supports the notion that a stronger grip on the promoter-factor complex results in an enhanced RNAP architecture.
转录因子通过独特且鲜为人知的机制调节基因表达。一种细菌转录亚复合物的晶体结构,该复合物包含因子PhoB的效应结构域、其靶DNA以及RNA聚合酶σ70亚基的σ4结构域,支持了这样一种观点,即对启动子 - 因子复合物更强的结合会导致RNA聚合酶结构的增强。