The DOI matches its Crossref record; 44 of the 44 references it cites were found in a registry or an index.
Hfq-dependent regulation of OmpA synthesis is mediated by an antisense RNA
Open accessAbstract
This paper shows that the small RNA MicA (previously SraD) is an antisense regulator of ompA in Escherichia coli . MicA accumulates upon entry into stationary phase and down-regulates the level of ompA mRNA. Regulation of ompA (outer membrane protein A), previously attributed to Hfq/mRNA binding, is lost upon deletion of the micA gene, whereas overexpression of MicA inhibits the synthesis of OmpA. In vitro, MicA binds to the ompA mRNA leader. Enzymatic and chemical probing was used to map the structures of MicA, the ompA mRNA leader, and the complex formed upon binding. MicA binding generates a footprint across the ompA Shine-Dalgarno sequence, consistent with a 12 + 4 base-pair interaction, which is additionally supported by the effect of mutations in vivo and by bioinformatics analysis of enterobacterial micA/ompA homolog sequences. MicA is conserved in many enterobacteria, as is its ompA target site. In vitro toeprinting confirmed that binding of MicA specifically interferes with ribosome binding. We propose that MicA, when present at high levels, blocks ribosome binding at the ompA translation start site, which—in line with previous work—secondarily facilitates RNase E cleavage and subsequent mRNA decay. MicA requires the presence of the Hfq protein, although the mechanistic basis for this remains unclear.
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Cites
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Cited by
Busch, A., Richter, A. S., & Backofen, R. (2008) · Bioinformatics · doi:10.1093/bioinformatics/btn544 · Cited by 552
The critical role of RNA processing and degradation in the control of gene expression
Arraiano, C. M., Andrade, J. M., Domingues, S., Guinote, I. B., Malecki, M., Matos, R. G., Moreira, R. N., Pobre, V., Reis, F. P., Saramago, M., et al. (2010) · FEMS Microbiology Reviews · doi:10.1111/j.1574-6976.2010.00242.x · Cited by 349
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Self-citationRoles of two RyhB paralogs in the physiology of Salmonella enterica
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Metadata
- Authors
- Udekwu, K. I., Darfeuille, F., Vogel, J., Reimegård, J., Holmqvist, E., & Wagner, E. G. H.
- Venue
- Genes & Development
- Publisher
- Cold Spring Harbor Laboratory
- Published
- 2005-10-01
- Volume
- 19
- Issue
- 19
- Pages
- 2355-2366
- ISSN
- 0890-9369 (ISSN-L)
- 1549-5477
- OpenAlex
- W2054260432
- Cited by
- 320
- References
- 44
- Type
- posted content
- Language
- en
- Open access
- diamond
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- Udekwu, K. I., Darfeuille, F., Vogel, J., Reimegård, J., Holmqvist, E., & Wagner, E. G. H. (2005). Hfq-dependent regulation of OmpA synthesis is mediated by an antisense RNA. Genes & Development. https://doi.org/10.1101/gad.354405
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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