生物
遗传学
甲基转移酶
表观遗传学
秀丽隐杆线虫
甲基化
核糖核酸
核糖体RNA
DNA甲基化
基因
基因表达
作者
Noa Liberman,M. Hafiz Rothi,Maxim V. Gerashchenko,Christiane Zorbas,Konstantinos Boulias,Fiona G. MacWhinnie,Kejun Ying,Anya Flood Taylor,Joseph Al Haddad,Hiroki Shibuya,Lara Roach,Anna Dong,Scarlett Dellacona,Denis L. J. Lafontaine,Vadim N. Gladyshev,Eric Lieberman Greer
出处
期刊:Molecular Cell
[Elsevier]
日期:2023-09-01
卷期号:83 (18): 3268-3282.e7
标识
DOI:10.1016/j.molcel.2023.08.014
摘要
Heritable non-genetic information can regulate a variety of complex phenotypes. However, what specific non-genetic cues are transmitted from parents to their descendants are poorly understood. Here, we perform metabolic methyl-labeling experiments to track the heritable transmission of methylation from ancestors to their descendants in the nematode Caenorhabditis elegans (C. elegans). We find heritable methylation in DNA, RNA, proteins, and lipids. We find that parental starvation elicits reduced fertility, increased heat stress resistance, and extended longevity in fed, naïve progeny. This intergenerational hormesis is accompanied by a heritable increase in N6'-dimethyl adenosine (m6,2A) on the 18S ribosomal RNA at adenosines 1735 and 1736. We identified DIMT-1/DIMT1 as the m6,2A and BUD-23/BUD23 as the m7G methyltransferases in C. elegans that are both required for intergenerational hormesis, while other rRNA methyltransferases are dispensable. This study labels and tracks heritable non-genetic material across generations and demonstrates the importance of rRNA methylation for regulating epigenetic inheritance.
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