TRBP ensures efficient Dicer processing of precursor microRNA in RNA-crowded environments.
TRBP ensures efficient Dicer processing of precursor microRNA in RNA-crowded environments.
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TRBP确保在RNA拥挤的环境中对前体microRNA的有效培训。
DOI:
10.1038/ncomms13694
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发表时间:
2016-12-09
影响因子:
16.6
通讯作者:
中科院分区:
文献类型:
--
作者:
The RNA-binding protein TRBP is a central component of the Dicer complex. Despite a decade of biochemical and structural studies, the essential functionality of TRBP in microRNA (miRNA) biogenesis remains unknown. Here we show that TRBP is an integral cofactor for time-efficient Dicer processing in RNA-crowded environments. We competed for Dicer processing of pre-miRNA with a large amount of cellular RNA species and found that Dicer-TRBP, but not Dicer alone, remains resilient. To apprehend the mechanism of this substrate selectivity, we use single-molecule fluorescence. The real-time observation reveals that TRBP acts as a gatekeeper, precluding Dicer from engaging with pre-miRNA-like substrates. TRBP acquires the selectivity using the PAZ domain of Dicer, whereas Dicer moderates the RNA-binding affinity of TRBP for fast turnover. This coordinated action between TRBP and Dicer accomplishes an efficient way of discarding pre-miRNA-like substrates. The RNA binding protein TRBP is a component of the Dicer complex but its role in microRNA biogenesis remains poorly understood. Here the authors use a crowded RNA environment and single-molecule imaging to show that TRBP acts as a gatekeeper to prevent Dicer engagement with pre miRNA-like substrates.
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DOI:
10.1016/j.ymeth.2016.03.022
发表时间:
2016-08-01
期刊:
Methods (San Diego, Calif.)
影响因子:
--
作者:
Fareh M;Loeff L;Szczepaniak M;Haagsma AC;Yeom KH;Joo C
通讯作者:
Joo C
影响因子:
64.8
作者:
Chendrimada, TP;Gregory, RI;Shiekhattar, R
通讯作者:
Shiekhattar, R
DOI:
10.1073/pnas.1212917110
发表时间:
2013-01-02
影响因子:
11.1
作者:
Koh, Hye Ran;Kidwell, Mary Anne;Myong, Sua
通讯作者:
Myong, Sua
DOI:
10.1073/pnas.0407378102
发表时间:
2004-12-28
影响因子:
11.1
作者:
Nedvetzki, S;Gonen, E;Naor, D
通讯作者:
Naor, D
影响因子:
11.4
作者:
Lee, Y;Hur, I;Kim, VN
通讯作者:
Kim, VN