RNA biochemistry. Determination of in vivo target search kinetics of regulatory noncoding RNA.
RNA biochemistry. Determination of in vivo target search kinetics of regulatory noncoding RNA.
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DOI:
10.1126/science.1258849
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发表时间:
2015-03-20
期刊:
影响因子:
--
通讯作者:
Ha T
中科院分区:
文献类型:
--
作者:
Fei J;Singh D;Zhang Q;Park S;Balasubramanian D;Golding I;Vanderpool CK;Ha T
Base-pairing interactions between nucleic acids mediate target recognition in many biological processes. We developed a super-resolution imaging and modeling platform that enabled the in vivo determination of base pairing-mediated target recognition kinetics. We examined a stress-induced bacterial small RNA, SgrS, which induces the degradation of target mRNAs. SgrS binds to a primary target mRNA in a reversible and dynamic fashion, and formation of SgrS-mRNA complexes is rate-limiting, dictating the overall regulation efficiency in vivo. Examination of a secondary target indicated that differences in the target search kinetics contribute to setting the regulation priority among different target mRNAs. This super-resolution imaging and analysis approach provides a conceptual framework that can be generalized to other sRNA systems and other target search processes.
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