Biology:OxyS RNA
| OxyS RNA | |
|---|---|
 Predicted secondary structure and sequence conservation of OxyS | |
| Identifiers | |
| Symbol | OxyS |
| Rfam | RF00035 |
| Other data | |
| RNA type | Gene; sRNA |
| Domain(s) | Bacteria |
| SO | 0000384 |
| PDB structures | PDBe |
OxyS RNA is a small non-coding RNA which is induced in response to oxidative stress in Escherichia coli. This RNA acts as a global regulator to activate or repress the expression of as many as 40 genes, by an antisense mechanism, including the fhlA-encoded transcriptional activator and the rpoS-encoded sigma(s) subunit of RNA polymerase.[1] OxyS is bound by the Hfq protein, that increases the OxyS RNA interaction with its target messages.[2][3] Binding to Hfq alters the conformation of OxyS.[4] The 109 nucleotide RNA is thought to be composed of three stem-loops.
Target genes
A number of additional targets were predicted and verified using microarray analysis.[5] These are listed below:
- yobF – confirmed by Northern analysis
- yaiZ
- rumA
- wrbA – confirmed by Northern analysis
- ybaY – confirmed by Northern analysis
Furthermore, the mRNA encoded by the nusG gene is a direct target of OxyS.[6]
References
- ↑ Altuvia, S; Zhang A; Argaman L; Tiwari A; Storz G (1998). "The Escherichia coli OxyS regulatory RNA represses fhlA translation by blocking ribosome binding". EMBO J 17 (20): 6069–6075. doi:10.1093/emboj/17.20.6069. PMID 9774350.
- ↑ Zhang, A; Wassarman KM; Ortega J; Steven AC; Storz G (2002). "The Sm-like Hfq protein increases OxyS RNA interaction with target mRNAs". Mol Cell 9 (1): 11–22. doi:10.1016/S1097-2765(01)00437-3. PMID 11804582.
- ↑ "Global RNA recognition patterns of post-transcriptional regulators Hfq and CsrA revealed by UV crosslinking in vivo". EMBO J 35 (9): 991–1011. 2016. doi:10.15252/embj.201593360. PMID 27044921.
- ↑ Henderson, CA; Vincent, HA; Casamento, A; Stone, CM; Phillips, JO; Cary, PD; Sobott, F; Gowers, DM et al. (August 2013). "Hfq binding changes the structure of Escherichia coli small noncoding RNAs OxyS and RprA, which are involved in the riboregulation of rpoS.". RNA 19 (8): 1089–1104. doi:10.1261/rna.034595.112. PMID 23804244.
- ↑ "Target prediction for small, noncoding RNAs in bacteria". Nucleic Acids Res. 34 (9): 2791–2802. 2006. doi:10.1093/nar/gkl356. PMID 16717284.
- ↑ "OxyS small RNA induces cell cycle arrest to allow DNA damage repair". EMBO J 37 (3): 413–426. 2018. doi:10.15252/embj.201797651. PMID 29237698.
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