OxyS RNA

OxyS RNA
OxyS RNA
RF00035.jpg
Predicted secondary structure and sequence conservation of OxyS
Identifiers
Symbol OxyS
Rfam RF00035
Other data
RNA type Gene; sRNA
Domain(s) Bacteria
SO 0000384

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]. The 109 nucleotide RNA is thought to be composed of three stem-loops.

Target genes of OxyS

A number of additional targets were recently predicted and verified using microarray analysis.[3] These are listed below:

  • yobF - confirmed by Northern analysis
  • yaiZ
  • rumA
  • wrbA - confirmed by Northern analysis
  • ybaY - confirmed by Northern analysis

References

  1. ^ 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. PMC 1170933. PMID 9774350. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1170933. 
  2. ^ 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. 
  3. ^ Tjaden B, Goodwin SS, Opdyke JA, et al. (2006). "Target prediction for small, noncoding RNAs in bacteria". Nucleic Acids Res. 34 (9): 2791–802. doi:10.1093/nar/gkl356. PMC 1464411. PMID 16717284. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=1464411. 

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