作者:Subrata Panja、Rakesh Paul、Marc M. Greenberg、Sarah A. Woodson
DOI:10.1002/anie.201501658
日期:2015.6.15
Non‐coding antisense RNAs regulate bacterial genes in response to nutrition or environmental stress, and can be engineered for artificial gene control. The RNA chaperone Hfq accelerates antisense pairing between non‐coding RNAs and their mRNA targets, by a mechanism still unknown. We used a photocaged guanosine derivative in an RNA oligonucleotide to temporally control Hfq catalyzed annealing. Using a fluorescent
非编码反义RNA可响应营养或环境压力来调节细菌基因,并可被设计用于人工基因控制。RNA伴侣Hfq通过未知的机制加速了非编码RNA与它们的mRNA靶标之间的反义配对。我们在RNA寡核苷酸中使用了光笼封的鸟苷衍生物来暂时控制Hfq催化的退火。使用荧光分子信标作为报告基因,我们观察到与Hfq络合的光笼RNA照射(3 s)后15 s内RNA双链体形成。结果表明,Hfq分子伴侣可直接稳定RNA碱基对的起始,并提出了通过非编码RNA进行光激活控制基因表达的策略。