SRSF3 recruits DROSHA to the basal junction of primary microRNAs.
SRSF3 recruits DROSHA to the basal junction of primary microRNAs.
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SRSF3 将 DROSHA 招募到初级 microRNA 的基底连接处
DOI:
10.1261/rna.065862.118
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发表时间:
2018-07
期刊:
影响因子:
--
通讯作者:
Nguyen TA
中科院分区:
文献类型:
--
作者:
Kim K;Nguyen TD;Li S;Nguyen TA
The Microprocessor complex, consisting of an RNase III DROSHA and the DGCR8 dimer, cleaves primary microRNA transcripts (pri-miRNAs) to initiate microRNA (miRNA) maturation. Pri-miRNAs are stem–loop RNAs, and ∼79% of them contain at least one of the three major and conserved RNA motifs, UG, UGU, and CNNC. We recently demonstrated that the basal UG and apical UGU motifs of pri-miRNAs interact with DROSHA and DGCR8, respectively. They help orient Microprocessor on pri-miRNA in a proper direction in which DROSHA and DGCR8 localize to the basal and apical pri-miRNA junctions, respectively. In addition, CNNC, located at ∼17 nucleotides (nt) from the Microprocessor cleavage site, interacts with SRSF3 (SRp20) to stimulate Microprocessor to process pri-miRNAs. The mechanism underlying this stimulation, however, is unknown. In this study, we discovered that SRSF3 recruits DROSHA to the basal junction in a CNNC-dependent manner, thereby enhancing Microprocessor activity. Furthermore, by generating various pri-miRNA substrates containing CNNC at different locations, we demonstrated that such stimulation only occurs when CNNC is located at ∼17 nt from the Microprocessor cleavage site. Our findings reveal the molecular mechanism of SRSF3 in pri-miRNA processing and support the previously proposed explanation for the highly conserved position of CNNC in SRSF3-enhanced pri-miRNA processing.
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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:
4.8
作者:
Galiana-Arnoux, D;Lejeune, F;Del Gatto-Konczak, F
通讯作者:
Del Gatto-Konczak, F
影响因子:
64.5
作者:
Han, Jinju;Lee, Yoontae;Kim, V. Narry
通讯作者:
Kim, V. Narry
影响因子:
9.2
作者:
Landthaler, M;Yalcin, A;Tuschl, T
通讯作者:
Tuschl, T
影响因子:
64.8
作者:
Denli, AM;Tops, BBJ;Hannon, GJ
通讯作者:
Hannon, GJ