Tunable, division-independent control of gene activation timing by a polycomb switch.
Tunable, division-independent control of gene activation timing by a polycomb switch.
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通过多梳开关对基因激活计时进行可调、独立于部门的控制。
DOI:
10.1016/j.celrep.2021.108888
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发表时间:
2021-03-23
期刊:
影响因子:
8.8
通讯作者:
Kueh HY
中科院分区:
文献类型:
--
作者:
Pease NA;Nguyen PHB;Woodworth MA;Ng KKH;Irwin B;Vaughan JC;Kueh HY
During development, progenitors often differentiate many cell generations after receiving signals. These delays must be robust yet tunable for precise population size control. Polycomb repressive mechanisms, involving histone H3 lysine-27 trimethylation (H3K27me3), restrain the expression of lineage-specifying genes in progenitors and may delay their activation and ensuing differentiation. Here, we elucidate an epigenetic switch controlling the T cell commitment gene Bcl11b that holds its locus in a heritable inactive state for multiple cell generations before activation. Integrating experiments and modeling, we identify a mechanism where H3K27me3 levels at Bcl11b, regulated by methyltransferase and demethylase activities, set the time delay at which the locus switches from a compacted, silent state to an extended, active state. This activation delay robustly spans many cell generations, is tunable by chromatin modifiers and transcription factors, and is independent of cell division. With their regulatory flexibility, such timed epigenetic switches may broadly control timing in development. H3K27me3 is found on repressed lineage-specifying gene loci in stem cells and may delay their activation in response to signals. Pease et al. identify an adjustable timer mechanism, where H3K27me3 levels at the T cell commitment gene Bcl11b, set by opposing writer and eraser enzymes, modulate the timing of gene locus decompaction and activation.
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DOI:
10.1126/science.aab2956
发表时间:
2016-02-12
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Bintu L;Yong J;Antebi YE;McCue K;Kazuki Y;Uno N;Oshimura M;Elowitz MB
通讯作者:
Elowitz MB
DOI:
10.1016/j.biosystems.2018.07.006
发表时间:
2018-09
期刊:
Bio Systems
影响因子:
--
作者:
Choi K;Medley JK;König M;Stocking K;Smith L;Gu S;Sauro HM
通讯作者:
Sauro HM
影响因子:
10.5
作者:
Alabert C;Barth TK;Reverón-Gómez N;Sidoli S;Schmidt A;Jensen ON;Imhof A;Groth A
通讯作者:
Groth A
影响因子:
9.3
作者:
Berry S;Dean C;Howard M
通讯作者:
Howard M
影响因子:
64.8
作者:
Agger, Karl;Cloos, Paul A. C.;Helin, Kristian
通讯作者:
Helin, Kristian