A disproportionate impact of G9a methyltransferase deficiency on the X chromosome.
A disproportionate impact of G9a methyltransferase deficiency on the X chromosome.
复制标题
DOI:
10.1101/gad.337592.120
复制
发表时间:
2021-07-01
影响因子:
10.5
通讯作者:
Lee JT
中科院分区:
文献类型:
--
作者:
Szanto A;Aguilar R;Kesner B;Blum R;Wang D;Cifuentes-Rojas C;Del Rosario BC;Kis-Toth K;Lee JT
In this study from Szanto et al., the authors investigated the role of G9a, a histone methyltransferase responsible for the dimethylation of histone H3 at lysine 9 (H3K9me2) that plays key roles in transcriptional silencing of developmentally regulated genes, in X-chromosome inactivation (XCI). They found a female-specific function of G9a and demonstrate that deleting G9a has a disproportionate impact on the X chromosome relative to the rest of the genome, and show RNA tethers G9a for allele-specific targeting of the H3K9me2 modification and the G9a–RNA interaction is essential for XCI. G9a is a histone methyltransferase responsible for the dimethylation of histone H3 at lysine 9 (H3K9me2). G9a plays key roles in transcriptional silencing of developmentally regulated genes, but its role in X-chromosome inactivation (XCI) has been under debate. Here, we uncover a female-specific function of G9a and demonstrate that deleting G9a has a disproportionate impact on the X chromosome relative to the rest of the genome. G9a deficiency causes a failure of XCI and female-specific hypersensitivity to drug inhibition of H3K9me2. We show that G9a interacts with Tsix and Xist RNAs, and that competitive inhibition of the G9a-RNA interaction recapitulates the XCI defect. During XCI, Xist recruits G9a to silence X-linked genes on the future inactive X. In parallel on the future Xa, Tsix recruits G9a to silence Xist in cis. Thus, RNA tethers G9a for allele-specific targeting of the H3K9me2 modification and the G9a-RNA interaction is essential for XCI.
登录
查看更多内容
影响因子:
50.3
作者:
Guler, Gulfem Dilek;Tindell, Charles Albert;Classon, Marie
通讯作者:
Classon, Marie
影响因子:
16
作者:
Cifuentes-Rojas, Catherine;Hernandez, Alfredo J.;Sarma, Kavitha;Lee, Jeannie T.
通讯作者:
Lee, Jeannie T.
DOI:
10.1126/science.aal2512
发表时间:
2017-06-09
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Almeida M;Pintacuda G;Masui O;Koseki Y;Gdula M;Cerase A;Brown D;Mould A;Innocent C;Nakayama M;Schermelleh L;Nesterova TB;Koseki H;Brockdorff N
通讯作者:
Brockdorff N
影响因子:
7.5
作者:
Dupont, Catherine;Gribnau, Joost
通讯作者:
Gribnau, Joost
影响因子:
10.5
作者:
BEARD, C;LI, E;JAENISCH, R
通讯作者:
JAENISCH, R