Svitkin Yuri V, Sonenberg Nahum
Department of Biochemistry and McGill Cancer Center, McGill University, Montreal, Quebec, Canada H3G 1Y6.
J Virol. 2003 Jun;77(11):6551-5. doi: 10.1128/jvi.77.11.6551-6555.2003.
We developed a system for complete replication of encephalomyocarditis virus (EMCV) in a test tube by using an in vitro translation extract from Krebs-2 cells. Efficient virus synthesis occurred in a narrow range of Mg(2+) and EMCV RNA concentrations. Excess input RNA impaired RNA replication and virus production but not translation. This suggests the existence of a negative-feedback mechanism for regulation of RNA replication by the viral plus-strand RNA or proteins.
我们利用克雷布斯2细胞的体外翻译提取物,开发了一种在试管中完全复制脑心肌炎病毒(EMCV)的系统。在狭窄的镁离子(Mg(2+))和EMCV RNA浓度范围内发生了高效的病毒合成。过量输入的RNA会损害RNA复制和病毒产生,但不会影响翻译。这表明存在一种由病毒正链RNA或蛋白质调控RNA复制的负反馈机制。