Ms1, a novel sRNA interacting with the RNA polymerase core in mycobacteria.
Ms1, a novel sRNA interacting with the RNA polymerase core in mycobacteria.
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DOI:
10.1093/nar/gku793
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发表时间:
2014-10
影响因子:
14.9
通讯作者:
Krásný L
中科院分区:
文献类型:
--
作者:
Hnilicová J;Jirát Matějčková J;Šiková M;Pospíšil J;Halada P;Pánek J;Krásný L
Small RNAs (sRNAs) are molecules essential for a number of regulatory processes in the bacterial cell. Here we characterize Ms1, a sRNA that is highly expressed in Mycobacterium smegmatis during stationary phase of growth. By glycerol gradient ultracentrifugation, RNA binding assay, and RNA co-immunoprecipitation, we show that Ms1 interacts with the RNA polymerase (RNAP) core that is free of the primary sigma factor (σA) or any other σ factor. This contrasts with the situation in most other species where it is 6S RNA that interacts with RNAP and this interaction requires the presence of σA. The difference in the interaction of the two types of sRNAs (Ms1 or 6S RNA) with RNAP possibly reflects the difference in the composition of the transcriptional machinery between mycobacteria and other species. Unlike Escherichia coli, stationary phase M. smegmatis cells contain relatively few RNAP molecules in complex with σA. Thus, Ms1 represents a novel type of small RNAs interacting with RNAP.
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DOI:
10.1073/pnas.94.10.4982
发表时间:
1997-05-13
影响因子:
11.1
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通讯作者:
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影响因子:
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Grainger DC
影响因子:
1.6
作者:
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通讯作者:
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