The SAM domain-containing protein 1 (SAMD1) acts as a repressive chromatin regulator at unmethylated CpG islands.
The SAM domain-containing protein 1 (SAMD1) acts as a repressive chromatin regulator at unmethylated CpG islands.
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包含 SAM 结构域的蛋白 1 (SAMD1) 在未甲基化的 CpG 岛充当抑制性染色质调节因子
DOI:
10.1126/sciadv.abf2229
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发表时间:
2021-05
期刊:
影响因子:
13.6
通讯作者:
Liefke R
中科院分区:
文献类型:
--
作者:
Stielow B;Zhou Y;Cao Y;Simon C;Pogoda HM;Jiang J;Ren Y;Phanor SK;Rohner I;Nist A;Stiewe T;Hammerschmidt M;Shi Y;Bulyk ML;Wang Z;Liefke R
SAMD1 is a newly identified repressive CpG island regulator. CpG islands (CGIs) are key regulatory DNA elements at most promoters, but how they influence the chromatin status and transcription remains elusive. Here, we identify and characterize SAMD1 (SAM domain-containing protein 1) as an unmethylated CGI-binding protein. SAMD1 has an atypical winged-helix domain that directly recognizes unmethylated CpG-containing DNA via simultaneous interactions with both the major and the minor groove. The SAM domain interacts with L3MBTL3, but it can also homopolymerize into a closed pentameric ring. At a genome-wide level, SAMD1 localizes to H3K4me3-decorated CGIs, where it acts as a repressor. SAMD1 tethers L3MBTL3 to chromatin and interacts with the KDM1A histone demethylase complex to modulate H3K4me2 and H3K4me3 levels at CGIs, thereby providing a mechanism for SAMD1-mediated transcriptional repression. The absence of SAMD1 impairs ES cell differentiation processes, leading to misregulation of key biological pathways. Together, our work establishes SAMD1 as a newly identified chromatin regulator acting at unmethylated CGIs.
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影响因子:
48
作者:
Huber W;Carey VJ;Gentleman R;Anders S;Carlson M;Carvalho BS;Bravo HC;Davis S;Gatto L;Girke T;Gottardo R;Hahne F;Hansen KD;Irizarry RA;Lawrence M;Love MI;MacDonald J;Obenchain V;Oleś AK;Pagès H;Reyes A;Shannon P;Smyth GK;Tenenbaum D;Waldron L;Morgan M
通讯作者:
Morgan M
影响因子:
13.6
作者:
Cao K;Collings CK;Morgan MA;Marshall SA;Rendleman EJ;Ozark PA;Smith ER;Shilatifard A
通讯作者:
Shilatifard A
影响因子:
7.7
作者:
Farcas AM;Blackledge NP;Sudbery I;Long HK;McGouran JF;Rose NR;Lee S;Sims D;Cerase A;Sheahan TW;Koseki H;Brockdorff N;Ponting CP;Kessler BM;Klose RJ
通讯作者:
Klose RJ
影响因子:
14.8
作者:
Kelley LA;Mezulis S;Yates CM;Wass MN;Sternberg MJ
通讯作者:
Sternberg MJ
影响因子:
46.9
作者:
Berger, Michael F.;Philippakis, Anthony A.;Bulyk, Martha L.
通讯作者:
Bulyk, Martha L.