{"title":"yqgF突变体的核糖体亚基组成在大肠杆菌的前16s rRNA加工中存在缺陷。","authors":"Tatsuaki Kurata, Shinobu Nakanishi, Masayuki Hashimoto, Masato Taoka, Toshiaki Isobe, Jun-Ichi Kato","doi":"10.1159/000494494","DOIUrl":null,"url":null,"abstract":"<p><p>Escherichia coli 16S, 23S, and 5S ribosomal RNAs (rRNAs) are transcribed as a single primary transcript, which is subsequently processed into mature rRNAs by several RNases. Three RNases (RNase III, RNase E, and RNase G) were reported to function in processing the 5'-leader of precursor 16S rRNA (pre-16S rRNA). Previously, we showed that a novel essential YqgF is involved in that processing. Here we investigated the ribosome subunits of the yqgFts mutant by LC-MS/MS. The mutant ribosome had decreased copy numbers of ribosome protein S1, suggesting that the yqgF gene enables incorporation of ribosomal protein S1 into ribosome by processing of the 5'-end of pre-16S rRNA. The ribosome protein S1 is essential for translation in E. coli; therefore, our results suggest that YqgF converts the inactive form of newly synthesized ribosome into the active form at the final step of ribosome assembly.</p>","PeriodicalId":16370,"journal":{"name":"Journal of Molecular Microbiology and Biotechnology","volume":null,"pages":null},"PeriodicalIF":1.2000,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1159/000494494","citationCount":"3","resultStr":"{\"title\":\"Subunit Composition of Ribosome in the yqgF Mutant Is Deficient in pre-16S rRNA Processing of Escherichia coli.\",\"authors\":\"Tatsuaki Kurata, Shinobu Nakanishi, Masayuki Hashimoto, Masato Taoka, Toshiaki Isobe, Jun-Ichi Kato\",\"doi\":\"10.1159/000494494\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p><p>Escherichia coli 16S, 23S, and 5S ribosomal RNAs (rRNAs) are transcribed as a single primary transcript, which is subsequently processed into mature rRNAs by several RNases. Three RNases (RNase III, RNase E, and RNase G) were reported to function in processing the 5'-leader of precursor 16S rRNA (pre-16S rRNA). Previously, we showed that a novel essential YqgF is involved in that processing. Here we investigated the ribosome subunits of the yqgFts mutant by LC-MS/MS. The mutant ribosome had decreased copy numbers of ribosome protein S1, suggesting that the yqgF gene enables incorporation of ribosomal protein S1 into ribosome by processing of the 5'-end of pre-16S rRNA. The ribosome protein S1 is essential for translation in E. coli; therefore, our results suggest that YqgF converts the inactive form of newly synthesized ribosome into the active form at the final step of ribosome assembly.</p>\",\"PeriodicalId\":16370,\"journal\":{\"name\":\"Journal of Molecular Microbiology and Biotechnology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.2000,\"publicationDate\":\"2018-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1159/000494494\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Molecular Microbiology and Biotechnology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1159/000494494\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"2018/12/19 0:00:00\",\"PubModel\":\"Epub\",\"JCR\":\"Q2\",\"JCRName\":\"Biochemistry, Genetics and Molecular Biology\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Molecular Microbiology and Biotechnology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1159/000494494","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2018/12/19 0:00:00","PubModel":"Epub","JCR":"Q2","JCRName":"Biochemistry, Genetics and Molecular Biology","Score":null,"Total":0}
Subunit Composition of Ribosome in the yqgF Mutant Is Deficient in pre-16S rRNA Processing of Escherichia coli.
Escherichia coli 16S, 23S, and 5S ribosomal RNAs (rRNAs) are transcribed as a single primary transcript, which is subsequently processed into mature rRNAs by several RNases. Three RNases (RNase III, RNase E, and RNase G) were reported to function in processing the 5'-leader of precursor 16S rRNA (pre-16S rRNA). Previously, we showed that a novel essential YqgF is involved in that processing. Here we investigated the ribosome subunits of the yqgFts mutant by LC-MS/MS. The mutant ribosome had decreased copy numbers of ribosome protein S1, suggesting that the yqgF gene enables incorporation of ribosomal protein S1 into ribosome by processing of the 5'-end of pre-16S rRNA. The ribosome protein S1 is essential for translation in E. coli; therefore, our results suggest that YqgF converts the inactive form of newly synthesized ribosome into the active form at the final step of ribosome assembly.
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