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Open Access Green as soon as Postprint is submitted to ZB.
Phenotype of htgA (mbiA), a recently evolved orphan gene of Escherichia coli and Shigella, completely overlapping in antisense to yaaW.
FEMS Microbiol. Lett. 350, 57-64 (2014)
Overlapping embedded genes, such as htgA/yaaW, are assumed to be rare in prokaryotes. In Escherichia coli O157:H7, gfp fusions of both promoter regions revealed activity and transcription start sites could be determined for both genes. Both htgA and yaaW were inactivated strand specifically by introducing a stop codon. Both mutants exhibited differential phenotypes in biofilm formation and metabolite levels in a nontargeted analysis, suggesting that both are functional despite YaaW but not HtgA could be expressed. While yaaW is distributed all over the Gammaproteobacteria, an overlapping htgA-like sequence is restricted to the Escherichia-Klebsiella clade. Full-length htgA is only present in Escherichia and Shigella, and htgA showed evidence for purifying selection. Thus, htgA is an interesting case of a lineage-specific, nonessential and young orphan gene.
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Publication type
Article: Journal article
Document type
Scientific Article
Keywords
htgA-yaaW; functional characterization; overlapping genes; Suicide Vector; Proteins; Mutations; Selection; Origin; Probe
ISSN (print) / ISBN
0378-1097
e-ISSN
1574-6968
Journal
FEMS Microbiology Letters
Quellenangaben
Volume: 350,
Issue: 1,
Pages: 57-64
Publisher
Wiley
Non-patent literature
Publications
Reviewing status
Peer reviewed
Institute(s)
Research Unit Analytical BioGeoChemistry (BGC)