Born, Johannes ; Weitzel, Kerstin ; Suess, Beatrix ; Pfeifer, Felicitas (2021)
A Synthetic Riboswitch to Regulate Haloarchaeal Gene Expression.
In: Frontiers in microbiology, 12
doi: 10.3389/fmicb.2021.696181
Artikel, Bibliographie
Dies ist die neueste Version dieses Eintrags.
Kurzbeschreibung (Abstract)
In recent years, synthetic riboswitches have become increasingly important to construct genetic circuits in all three domains of life. In bacteria, synthetic translational riboswitches are often employed that modulate gene expression by masking the Shine-Dalgarno (SD) sequence in the absence or presence of a cognate ligand. For (halo-)archaeal translation, a SD sequence is not strictly required. The application of synthetic riboswitches in haloarchaea is therefore limited so far, also because of the molar intracellular salt concentrations found in these microbes. In this study, we applied synthetic theophylline-dependent translational riboswitches in the archaeon . The riboswitch variants A through E and E were chosen since they not only mask the SD sequence but also the AUG start codon by forming a secondary structure in the absence of the ligand theophylline. Upon addition of the ligand, the ribosomal binding site and start codon become accessible for translation initiation. Riboswitch E mediated a dose-dependent, up to threefold activation of the reporter gene expression. Raising the salt concentration of the culture media from 3 to 4 M NaCl resulted in a 12-fold increase in the switching capacity of riboswitch E, and switching activity increased up to 26-fold when the cultivating temperature was reduced from 45 to 30°C. To construct a genetic circuit, riboswitch E was applied to regulate the synthesis of the transcriptional activator GvpE allowing a dose-dependent activation of the reporter gene under promoter control.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2021 |
| Autor(en): | Born, Johannes ; Weitzel, Kerstin ; Suess, Beatrix ; Pfeifer, Felicitas |
| Art des Eintrags: | Bibliographie |
| Titel: | A Synthetic Riboswitch to Regulate Haloarchaeal Gene Expression |
| Sprache: | Englisch |
| Publikationsjahr: | 15 Juni 2021 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Frontiers in microbiology |
| Jahrgang/Volume einer Zeitschrift: | 12 |
| DOI: | 10.3389/fmicb.2021.696181 |
| Zugehörige Links: | |
| Kurzbeschreibung (Abstract): | In recent years, synthetic riboswitches have become increasingly important to construct genetic circuits in all three domains of life. In bacteria, synthetic translational riboswitches are often employed that modulate gene expression by masking the Shine-Dalgarno (SD) sequence in the absence or presence of a cognate ligand. For (halo-)archaeal translation, a SD sequence is not strictly required. The application of synthetic riboswitches in haloarchaea is therefore limited so far, also because of the molar intracellular salt concentrations found in these microbes. In this study, we applied synthetic theophylline-dependent translational riboswitches in the archaeon . The riboswitch variants A through E and E were chosen since they not only mask the SD sequence but also the AUG start codon by forming a secondary structure in the absence of the ligand theophylline. Upon addition of the ligand, the ribosomal binding site and start codon become accessible for translation initiation. Riboswitch E mediated a dose-dependent, up to threefold activation of the reporter gene expression. Raising the salt concentration of the culture media from 3 to 4 M NaCl resulted in a 12-fold increase in the switching capacity of riboswitch E, and switching activity increased up to 26-fold when the cultivating temperature was reduced from 45 to 30°C. To construct a genetic circuit, riboswitch E was applied to regulate the synthesis of the transcriptional activator GvpE allowing a dose-dependent activation of the reporter gene under promoter control. |
| ID-Nummer: | pmid:34211452 |
| Fachbereich(e)/-gebiet(e): | 10 Fachbereich Biologie 10 Fachbereich Biologie > Microbiology and Archaea 10 Fachbereich Biologie > Synthetic RNA biology |
| Hinterlegungsdatum: | 05 Jul 2021 11:51 |
| Letzte Änderung: | 03 Jul 2024 02:52 |
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| Suche nach Titel in: | TUfind oder in Google |
Verfügbare Versionen dieses Eintrags
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A Synthetic Riboswitch to Regulate Haloarchaeal Gene Expression. (deposited 30 Aug 2021 12:26)
- A Synthetic Riboswitch to Regulate Haloarchaeal Gene Expression. (deposited 05 Jul 2021 11:51) [Gegenwärtig angezeigt]
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