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Интеллектуальная Система Тематического Исследования НАукометрических данных |
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Insights into the molecular mechanism of translation inhibition by the ribosome-targeting antibiotic thermorubinстатья
Статья опубликована в высокорейтинговом журнале
Статья опубликована в журнале из списка Web of Science и/или Scopus- Авторы: Paranjpe Madhura N., Marina Valeria I., Grachev Aleksandr A., Maviza Tinashe P., Tolicheva Olga A., Paleskava Alena, Osterman Ilya A., Sergiev Petr V., Konevega Andrey L., Polikanov Yury S., Gagnon Matthieu G.
- Журнал: Nucleic Acids Research
- Год издания: 2022
- Издательство: Oxford University Press
- Местоположение издательства: United Kingdom
- DOI: 10.1093/nar/gkac1189
- Аннотация: Thermorubin (THR) is an aromatic anthracenopyranone antibiotic active against both Gram- positive and Gram-negative bacteria. It is known to bind to the 70S ribosome at the intersubunit bridge B2a and was thought to inhibit factor-dependent initiation of translation and obstruct the accommodation of tRNAs into the A site. Here, we show that thermorubin causes ribosomes to stall in vivo and in vitro at internal and termination codons, thereby allowing the ribosome to initiate protein synthesis and translate at least a few codons before stalling. Our biochemical data show that THR affects multiple steps of translation elongation with a significant impact on the binding stability of the tRNA in the A site, explaining premature cessation of translation. Our high- resolution crystal and cryo-EM structures of the 70S-THR complex show that THR can co-exist with P- and A-site tRNAs, explaining how ribosomes can elongate in the presence of the drug. Remarkable is the ability of THR to arrest ribosomes at the stop codons. Our data suggest that by causing structural re-arrangements in the decoding center, THR interferes with the accommodation of tRNAs or release factors into the ribosomal A site.
- Добавил в систему: Марина Валерия Ивановна