An architectural role for a nuclear noncoding RNA: NEAT1 RNA is essential for the structure of paraspeckles.
An architectural role for a nuclear noncoding RNA: NEAT1 RNA is essential for the structure of paraspeckles.
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DOI:
10.1016/j.molcel.2009.01.026
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发表时间:
2009-03-27
期刊:
影响因子:
16
通讯作者:
Lawrence, Jeanne B.
中科院分区:
文献类型:
--
作者:
Clemson, Christine M.;Hutchinson, John N.;Sara, Sergio A.;Ensminger, Alexander W.;Fox, Archa H.;Chess, Andrew;Lawrence, Jeanne B.
NEAT1 RNA, a highly abundant 4 kb ncRNA, is retained in nuclei in ~10–20 large foci that we show is completely coincident with paraspeckles, nuclear domains implicated in mRNA nuclear retention. Depletion of NEAT1 RNA via RNAi eradicates paraspeckles, suggesting it controls sequestration of the paraspeckle proteins, PSP1 and p54, factors linked to A-I editing. Unlike over-expression of PSP1, NEAT1 over-expression increases paraspeckle number, and paraspeckles emanate exclusively from the NEAT1 transcription site. The PSP-1 RNA binding domain is required for its co-localization with NEAT1 RNA in paraspeckles, and biochemical analyses supports that NEAT1 RNA binds with paraspeckle proteins. Unlike other nuclear retained RNAs, NEAT1 RNA is not A-I edited, consistent with a structural role in paraspeckles. Collectively results demonstrate that NEAT1 functions as an essential structural determinant of paraspeckles, providing a precedent for a ncRNA as the foundation of a nuclear domain.
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