JANUS, a spliceosome-associated protein, promotes miRNA biogenesis in Arabidopsis.
JANUS, a spliceosome-associated protein, promotes miRNA biogenesis in Arabidopsis.
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DOI:
10.1093/nar/gkad1105
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发表时间:
2024-01-11
影响因子:
14.9
通讯作者:
中科院分区:
文献类型:
--
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MicroRNAs (miRNAs) are important regulators of genes expression. Their levels are precisely controlled through modulating the activity of the microprocesser complex (MC). Here, we report that JANUS, a homology of the conserved U2 snRNP assembly factor in yeast and human, is required for miRNA accumulation. JANUS associates with MC components Dicer-like 1 (DCL1) and SERRATE (SE) and directly binds the stem-loop of pri-miRNAs. In a hypomorphic janus mutant, the activity of DCL1, the numbers of MC, and the interaction of primary miRNA transcript (pri-miRNAs) with MC are reduced. These data suggest that JANUS promotes the assembly and activity of MC through its interaction with MC and/or pri-miRNAs. In addition, JANUS modulates the transcription of some pri-miRNAs as it binds the promoter of pri-miRNAs and facilitates Pol II occupancy of at their promoters. Moreover, global splicing defects are detected in janus. Taken together, our study reveals a novel role of a conserved splicing factor in miRNA biogenesis.
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影响因子:
14.9
作者:
Ben Chaabane S;Liu R;Chinnusamy V;Kwon Y;Park JH;Kim SY;Zhu JK;Yang SW;Lee BH
通讯作者:
Lee BH
影响因子:
2.7
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Saint-Jeannet JP
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11.6
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Qi, Yijun
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11.8
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Gregory, Brian D.;O'Malley, Ronan C.;Ecker, Joseph R.
通讯作者:
Ecker, Joseph R.
影响因子:
4.9
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通讯作者:
Chua, Nam-Hai