Jpx RNA activates Xist by evicting CTCF.
Jpx RNA activates Xist by evicting CTCF.
复制标题
JPX RNA通过驱逐CTCF激活XIST。
DOI:
10.1016/j.cell.2013.05.028
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发表时间:
2013-06-20
期刊:
影响因子:
64.5
通讯作者:
Lee JT
中科院分区:
文献类型:
--
作者:
Sun S;Del Rosario BC;Szanto A;Ogawa Y;Jeon Y;Lee JT
In mammals, dosage compensation between XX and XY individuals occurs through X chromosome inactivation (XCI). The noncoding Xist RNA is expressed and initiates XCI only when more than one X chromosome is present. Current models invoke a dependency on the X-to-autosome ratio (X:A), but molecular factors remain poorly defined. Here, we demonstrate that molecular titration between an X-encoded RNA and an autosomally encoded protein dictates Xist induction. In pre-XCI cells, CTCF protein represses Xist transcription. At the onset of XCI, Jpx RNA is upregulated, binds CTCF, and extricates CTCF from one Xist allele. We demonstrate that CTCF is an RNA-binding protein and is titrated away from the Xist promoter by Jpx RNA. Thus, Jpx activates Xist by evicting CTCF. The functional antagonism via molecular titration reveals a role for long noncoding RNA in epigenetic regulation.
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DOI:
10.1073/pnas.1013021107
发表时间:
2011-01-04
影响因子:
11.1
作者:
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通讯作者:
Shippen, Dorothy E.
影响因子:
4.4
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影响因子:
12.3
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通讯作者:
Hannenhalli S
影响因子:
64.5
作者:
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通讯作者:
Gribnau, Joost
影响因子:
16
作者:
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通讯作者:
Lee, Jeannie T.