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The 23S-5S spacer of two rRNA loci of Streptococcus salivarius subsp thermophilus includes a promoter

Abstract : The nucleotide sequence of the 3' part of a ribosomal and transfer RNA locus from Streptococcus salivarius subsp thermophilus NST1403 was determined. The sequenced DNA fragment includes the 3' end of a 23S rRNA gene, a 5S rRNA gene, a tRNA(asn) gene and a potential transcriptional terminator. The tRNA gene does not encode for the CCA 3'terminus of mature tRNA. We compared this sequence to a promoter-carrying DNA fragment sequence (P20) of Streptococcus salivarius subsp thermophilus A054 [1]. We found that the P20 sequence included the 3' end of a 23S rRNA gene, a 5S rRNA gene and the 5' part of a tRNA(val) gene. The two 23S-5S spacer sequences are identical and contain a promoter and a potential 23S rRNA processing site. Therefore, 5S rRNA and tRNA genes could be transcribed from a promoter located within the 23S-5S spacer of at least two of the six rRNA loci.
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https://hal.univ-lorraine.fr/hal-01659169
Contributor : Pierre Leblond <>
Submitted on : Friday, December 8, 2017 - 10:51:15 AM
Last modification on : Tuesday, March 17, 2020 - 2:32:16 AM

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  • HAL Id : hal-01659169, version 1
  • PUBMED : 1381619

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G. Guédon, M Pébay, C Colmin, J M Simonet, B. Decaris. The 23S-5S spacer of two rRNA loci of Streptococcus salivarius subsp thermophilus includes a promoter. Biochimie, Elsevier, 1992, 74 (6), pp.585-8. ⟨hal-01659169⟩

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