Paulina Fischer, Matthias Thoms, Benjamin Lau, Timo Denk, Maria Kuvshinova, Otto Berninghausen, Dirk Flemming, Ed Hurt, Roland Beckmann
{"title":"H/ACA snoRNP 引导核糖体 RNA 亚域在卫星颗粒中折叠,然后加入核心 90S 前核糖体","authors":"Paulina Fischer, Matthias Thoms, Benjamin Lau, Timo Denk, Maria Kuvshinova, Otto Berninghausen, Dirk Flemming, Ed Hurt, Roland Beckmann","doi":"10.1101/2024.09.05.611419","DOIUrl":null,"url":null,"abstract":"During synthesis, modification and maturation of the ribosomal RNA, correct subdomain folding without additional guidance poses a major challenge. An essential H/ACA snoRNP, snR30, was observed to be outsourced from the core of the 90S, the earliest known pre-ribosome, to form a \"satellite particle\". This particle interacts with the so-called 18S rRNA platform subdomain, guiding its independent folding through localized structural interactions. Once this subdomain achieves its proper conformation, it is integrated into the core pre-ribosome, contributing to the overall maturation of the 18S rRNA. By temporarily segregating the folding process within a specialized satellite particle, the correct assembly of individual components is facilitated, thereby reducing the risk of errors during the complex process of ribosome assembly. In a broader sense, molecular outsourcing in cellular processes, where transient subcomplexes handle specific tasks before rejoining the main assembly line, can enhance efficiency and accuracy of complex molecular processes like ribosome biogenesis.","PeriodicalId":501147,"journal":{"name":"bioRxiv - Biochemistry","volume":"3 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"H/ACA snoRNP guides ribosomal RNA subdomain folding in a satellite particle before joining the core 90S pre-ribosome\",\"authors\":\"Paulina Fischer, Matthias Thoms, Benjamin Lau, Timo Denk, Maria Kuvshinova, Otto Berninghausen, Dirk Flemming, Ed Hurt, Roland Beckmann\",\"doi\":\"10.1101/2024.09.05.611419\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"During synthesis, modification and maturation of the ribosomal RNA, correct subdomain folding without additional guidance poses a major challenge. An essential H/ACA snoRNP, snR30, was observed to be outsourced from the core of the 90S, the earliest known pre-ribosome, to form a \\\"satellite particle\\\". This particle interacts with the so-called 18S rRNA platform subdomain, guiding its independent folding through localized structural interactions. Once this subdomain achieves its proper conformation, it is integrated into the core pre-ribosome, contributing to the overall maturation of the 18S rRNA. By temporarily segregating the folding process within a specialized satellite particle, the correct assembly of individual components is facilitated, thereby reducing the risk of errors during the complex process of ribosome assembly. In a broader sense, molecular outsourcing in cellular processes, where transient subcomplexes handle specific tasks before rejoining the main assembly line, can enhance efficiency and accuracy of complex molecular processes like ribosome biogenesis.\",\"PeriodicalId\":501147,\"journal\":{\"name\":\"bioRxiv - Biochemistry\",\"volume\":\"3 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"bioRxiv - Biochemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1101/2024.09.05.611419\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"bioRxiv - Biochemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1101/2024.09.05.611419","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
H/ACA snoRNP guides ribosomal RNA subdomain folding in a satellite particle before joining the core 90S pre-ribosome
During synthesis, modification and maturation of the ribosomal RNA, correct subdomain folding without additional guidance poses a major challenge. An essential H/ACA snoRNP, snR30, was observed to be outsourced from the core of the 90S, the earliest known pre-ribosome, to form a "satellite particle". This particle interacts with the so-called 18S rRNA platform subdomain, guiding its independent folding through localized structural interactions. Once this subdomain achieves its proper conformation, it is integrated into the core pre-ribosome, contributing to the overall maturation of the 18S rRNA. By temporarily segregating the folding process within a specialized satellite particle, the correct assembly of individual components is facilitated, thereby reducing the risk of errors during the complex process of ribosome assembly. In a broader sense, molecular outsourcing in cellular processes, where transient subcomplexes handle specific tasks before rejoining the main assembly line, can enhance efficiency and accuracy of complex molecular processes like ribosome biogenesis.