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Glm Y RNA activator of glmS mRNA
Predicted secondary structure and sequence conservation of GlmY_tke1
Symbol GlmY_tke1
Alt. Symbols tke1
Rfam RF00128
Other data
RNA type Gene; sRNA
Domain(s) Bacteria
SO 0000655

The GlmY RNA (formally known as tke1) family consists of a number of bacterial RNA genes of around 167 bases in length. The GlmY RNA gene is present in Escherichia coli, Shigella flexneri, Yersinia pestis and Salmonella species, where it is found between the yfhK and purL genes. It was originally predicted in a bioinformatic screen for novel ncRNAs in E. coli.[1]

The GlmY sRNA has been shown to activate the synthesis of GlmS.[2] It achieves this by influencing the action of another sRNA called GlmZ in a hierarchical fashion.[3][4][5] GlmY functions as an anti-adaptor, it binds to RapZ (RNase adaptor protein for sRNA GlmZ), this binding prevents RapZ from binding to GlmZ and targeting it for cleavage by RNase E.[6]

Further studies have shown that GlmY mutants are sensitive to cell envelope stress.[7]


  1. ^ Rivas, E; Klein RJ; Jones TA; Eddy SR (2001). "Computational identification of noncoding RNAs in E. coli by comparative genomics". Curr Biol. 11 (17): 1369–1373. PMID 11553332. doi:10.1016/S0960-9822(01)00401-8. 
  2. ^ Urban JH, Papenfort K, Thomsen J, Schmitz RA, Vogel J (2007). "A conserved small RNA promotes discoordinate expression of the glmUS operon mRNA to activate GlmS synthesis.". J Mol Biol. 373 (3): 521–8. PMID 17854828. doi:10.1016/j.jmb.2007.07.035. 
  3. ^ Reichenbach B, Maes A, Kalamorz F, Hajnsdorf E, Görke B (2008). "The small RNA GlmY acts upstream of the sRNA GlmZ in the activation of glmS expression and is subject to regulation by polyadenylation in Escherichia coli.". Nucleic Acids Res. 36 (8): 2570–80. PMC 2377431Freely accessible. PMID 18334534. doi:10.1093/nar/gkn091. 
  4. ^ Urban JH, Vogel J (2008). "Two seemingly homologous noncoding RNAs act hierarchically to activate glmS mRNA translation.". PLoS Biol. 6 (3): e64. PMC 2267818Freely accessible. PMID 18351803. doi:10.1371/journal.pbio.0060064. 
  5. ^ Görke B, Vogel J (2008). "Noncoding RNA control of the making and breaking of sugars.". Genes Dev. 22 (21): 2914–25. PMID 18981470. doi:10.1101/gad.1717808. 
  6. ^ Göpel, Y; Papenfort, K; Reichenbach, B; Vogel, J; Görke, B (Mar 1, 2013). "Targeted decay of a regulatory small RNA by an adaptor protein for RNase E and counteraction by an anti-adaptor RNA.". Genes & Development. 27 (5): 552–64. PMC 3605468Freely accessible. PMID 23475961. doi:10.1101/gad.210112.112. 
  7. ^ Hobbs EC, Astarita JL, Storz G (2010). "Small RNAs and small proteins involved in resistance to cell envelope stress and acid shock in Escherichia coli: analysis of a bar-coded mutant collection.". J Bacteriol. 192 (1): 59–67. PMC 2798238Freely accessible. PMID 19734312. doi:10.1128/JB.00873-09. 

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