Facultative heterochromatin formation in rDNA is essential for cell survival during nutritional starvation.
Facultative heterochromatin formation in rDNA is essential for cell survival during nutritional starvation.
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rDNA中兼性异染色质的形成对于营养饥饿期间的细胞存活是必不可少的。
DOI:
10.1093/nar/gkac175
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发表时间:
2022-04-22
影响因子:
14.9
通讯作者:
Ohta, Kunihiro
中科院分区:
文献类型:
--
作者:
Hirai, Hayato;Takemata, Naomichi;Tamura, Miki;Ohta, Kunihiro
During the cellular adaptation to nutrient starvation, cells temporarily decelerate translation processes including ribosomal biogenesis. However, the mechanisms repressing robust gene expression from the ribosomal gene cluster (rDNA) are unclear. Here, we demonstrate that fission yeast cells facing glucose starvation assemble facultative heterochromatin in rDNA leading to its transcriptional repression. Glucose starvation induces quick dissociation of the ATF/CREB-family protein Atf1 from rDNA, where in turn the histone chaperone FACT is recruited to promote H3K9 methylation and heterochromatinization. We also identify the histone acetyltransferase Gcn5 as a repressor of rDNA heterochromatinization in glucose-rich conditions, and this protein dissociates from rDNA upon glucose starvation. Facultative heterochromatin formation in rDNA requires histone deacetylases Clr3 and both the RNAi-dependent and -independent gene silencing pathways. This is essential in adaptation to starvation since mutants lacking heterochromatin formation in rDNA lead to untimely cell death during glucose starvation.
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影响因子:
3.7
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Eshaghi M;Lee JH;Zhu L;Poon SY;Li J;Cho KH;Chu Z;Karuturi RK;Liu J
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Liu J
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10.5
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Groth A
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3.3
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Grant, PA;Eberharter, A;Workman, JL
通讯作者:
Workman, JL