Listeria LhrC ncRNA was identified by screening for RNA molecules which co-immunoprecipitated with the RNA chaperone Hfq.[1] However, neither the stability nor the activity of LhrC seem to depend on the presence of Hfq.[2][3] This RNA is transcribed from an intergenic region between the protein coding genes cysK, a putative cysteine synthase and sul, a putative dihydropteroate synthase. In Listeria monocytogenes four additional copies of lhrC have been identified in the genome, three of which are located in tandem repeat upstream of the originally characterised lhrC. This RNA molecule appears to be conserved amongst Listeria species but has not been identified in other bacterial species. It is involved in virulence.[2] The direct mRNA targets of LhrC are the virulence adhesion LapB, and the oligopeptide binding protein OppA.[2][3] The 3 conserved UCCC motifs common to all copies of LhrC are involved in the mRNA binding and post-transcriptional repression of the target genes. Two other Listerina monocytogenes sRNAs Rli22 and Rli33 contain 2 UCCC motifs and use them to repress oppA mRNA expression.[4]
| Listeria LhrC | |
|---|---|
 Predicted secondary structure and sequence conservation of LhrC | |
| Identifiers | |
| Symbol | LhrC |
| Rfam | RF00616 |
| Other data | |
| RNA type | Gene; sRNA |
| Domain(s) | Bacteria |
| SO | SO:0000655 |
| PDB structures | PDBe |
See also
editReferences
edit- ^ Christiansen JK, Nielsen JS, Ebersbach T, Valentin-Hansen P, Søgaard-Andersen L, Kallipolitis BH (2006). "Identification of small Hfq-binding RNAs in Listeria monocytogenes". RNA. 12 (7): 1383–1396. doi:10.1261/rna.49706. PMC 1484441. PMID 16682563.
- ^ a b c Sievers, S; Lillebæk, EM; Jacobsen, K; Lund, A; Mollerup, MS; Nielsen, PK; Kallipolitis, BH (Jul 17, 2014). "A multicopy sRNA of Listeria monocytogenes regulates expression of the virulence adhesin LapB". Nucleic Acids Research. 42 (14): 9383–9398. doi:10.1093/nar/gku630. PMC 4132741. PMID 25034691.
- ^ a b Sievers, Susanne; Lund, Anja; Menendez-Gil, Pilar; Nielsen, Aaraby; Storm Mollerup, Maria; Lambert Nielsen, Stine; Buch Larsson, Pernille; Borch-Jensen, Jonas; Johansson, Jörgen (2015). "The multicopy sRNA LhrC controls expression of the oligopeptide-binding protein OppA in Listeria monocytogenes". RNA Biology. 12 (9): 985–997. doi:10.1080/15476286.2015.1071011. ISSN 1555-8584. PMC 4615310. PMID 26176322.
- ^ Mollerup, Maria Storm; Ross, Joseph Andrew; Helfer, Anne-Catherine; Meistrup, Kristine; Romby, Pascale; Kallipolitis, Birgitte Haahr (September 2016). "Two novel members of the LhrC family of small RNAs in Listeria monocytogenes with overlapping regulatory functions but distinctive expression profiles". RNA Biology. 13 (9): 895–915. doi:10.1080/15476286.2016.1208332. ISSN 1555-8584. PMC 5013991. PMID 27400116.
External links
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