Direct epitranscriptomic regulation of mammalian translation initiation through N4-acetylcytidine.
Direct epitranscriptomic regulation of mammalian translation initiation through N4-acetylcytidine.
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通过N4-乙酰胞苷对哺乳动物翻译起始的直接表转录调控。
DOI:
10.1016/j.molcel.2022.05.016
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发表时间:
2022-08-04
期刊:
影响因子:
16
通讯作者:
Oberdoerffer, Shalini
中科院分区:
文献类型:
--
作者:
Arango, Daniel;Sturgill, David;Yang, Renbin;Kanai, Tapan;Bauer, Paulina;Roy, Jyoti;Wang, Ziqiu;Hosogane, Masaki;Schiffers, Sarah;Oberdoerffer, Shalini
mRNA function is influenced by modifications that modulate canonical nucleobase behavior. We show that a single modification mediates distinct impacts on mRNA translation in a position-dependent manner. While cytidine acetylation (ac4C) within protein-coding sequences stimulates translation, ac4C within 5’UTRs impacts protein synthesis at the level of initiation. 5’UTR acetylation promotes initiation at upstream sequences, competitively inhibiting annotated start codons. Acetylation further directly impedes initiation at optimal AUG contexts: ac4C within AUG-flanking Kozak sequences reduced initiation in base-resolved transcriptome-wide HeLa results, and in vitro utilizing substrates with site-specific ac4C incorporation. Cryo-EM of mammalian 80S initiation complexes revealed ac4C in the −1-position adjacent to an AUG start codon disrupts an interaction between C and hypermodified t6A at nucleotide 37 of the initiator tRNA. These findings demonstrate the impact of RNA modifications on nucleobase function at a molecular level and introduce mRNA acetylation as a factor regulating translation in a location-specific manner. mRNA modifications alter canonical nucleobase behavior. Arango et al. show that a single modification, ac4C, influences mRNA translation in a position dependent manner. ac4C within coding sequences promotes elongation, while 5’UTR ac4C inhibits initiation through the generation of repressive structures and through direct modulation of tRNAiMet interactions.
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DOI:
10.1093/bioinformatics/btr064
发表时间:
2011-04-01
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Grant CE;Bailey TL;Noble WS
通讯作者:
Noble WS
DOI:
10.1093/bioinformatics/btu638
发表时间:
2015-01-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
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通讯作者:
Huber W
影响因子:
5.5
作者:
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通讯作者:
Xue, Xiangyang
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
--
作者:
Cheng HL;Liu YF;Su CW;Su SC;Chen MK;Yang SF;Lin CW
通讯作者:
Lin CW