The Seed Region of a Small RNA Drives the Controlled Destruction of the Target mRNA by the Endoribonuclease RNase E
Please always quote using this URN: urn:nbn:de:bvb:20-opus-126202
- Numerous small non-coding RNAs (sRNAs) in bacteria modulate rates of translation initiation and degradation of target mRNAs, which they recognize through base-pairing facilitated by the RNA chaperone Hfq. Recent evidence indicates that the ternary complex of Hfq, sRNA and mRNA guides endoribonuclease RNase E to initiate turnover of both the RNAs. We show that a sRNA not only guides RNase E to a defined site in a target RNA, but also allosterically activates the enzyme by presenting a monophosphate group at the 5′-end of the cognate-pairingNumerous small non-coding RNAs (sRNAs) in bacteria modulate rates of translation initiation and degradation of target mRNAs, which they recognize through base-pairing facilitated by the RNA chaperone Hfq. Recent evidence indicates that the ternary complex of Hfq, sRNA and mRNA guides endoribonuclease RNase E to initiate turnover of both the RNAs. We show that a sRNA not only guides RNase E to a defined site in a target RNA, but also allosterically activates the enzyme by presenting a monophosphate group at the 5′-end of the cognate-pairing “seed.” Moreover, in the absence of the target the 5′-monophosphate makes the sRNA seed region vulnerable to an attack by RNase E against which Hfq confers no protection. These results suggest that the chemical signature and pairing status of the sRNA seed region may help to both ‘proofread’ recognition and activate mRNA cleavage, as part of a dynamic process involving cooperation of RNA, Hfq and RNase E.…
Author: | Katarzyna J. Bandyra, Nelly Said, Verena Pfeiffer, Maria W. Górna, Jörg Vogel, Ben F. Luisi |
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URN: | urn:nbn:de:bvb:20-opus-126202 |
Document Type: | Journal article |
Faculties: | Medizinische Fakultät / Institut für Molekulare Infektionsbiologie |
Language: | English |
Parent Title (English): | Molecular Cell |
Year of Completion: | 2012 |
Volume: | 47 |
Issue: | 6 |
Pagenumber: | 943–953 |
Source: | Molecular Cell 47 (2012), 943–953. DOI:10.1016/j.molcel.2012.07.015 |
DOI: | https://doi.org/10.1016/j.molcel.2012.07.015 |
Dewey Decimal Classification: | 6 Technik, Medizin, angewandte Wissenschaften / 61 Medizin und Gesundheit / 610 Medizin und Gesundheit |
Tag: | medicine |
Release Date: | 2016/07/12 |
Licence (German): | CC BY: Creative-Commons-Lizenz: Namensnennung |