ArticlePloS one2013
Block and boost DNA transfer: opposite roles of OmpA in natural and artificial transformation of Escherichia coli.
Article in PloS one, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 15 citations in OpenAlex.
- Abundant bacterial nucleoid-associated protein H-NS limits plasmid transfer through mechanical modification of DNA.Nucleic acids research · 2025Article
- Evaporation-induced hydrodynamics promote conjugation-mediated plasmid transfer in microbial populations.ISME communications · 2021Article
- A Type I Restriction Modification System Influences Genomic Evolution Driven by Horizontal Gene Transfer inFrontiers in microbiology · 2021Article
- Identification ofGenetics · 2020Article
- A Periplasmic Antimicrobial Peptide-Binding Protein Is Required for Stress Survival inFrontiers in microbiology · 2019Article
- Horizontal Plasmid Transfer by Transformation inFrontiers in microbiology · 2018Review
- Pull in and Push Out: Mechanisms of Horizontal Gene Transfer in Bacteria.Frontiers in microbiology · 2018Article
- Positive Effect of Carbon Sources on Natural Transformation in Escherichia coli: Role of Low-Level Cyclic AMP (cAMP)-cAMP Receptor Protein in the Derepression of rpoS.Journal of bacteriology · 2015Article
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Authors and funding
5 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Our previous work established that DNA is naturally transferable on agar plates through a new transformation system which is regulated by the stationary phase master regulator RpoS in Escherichia coli. In this transformation system, neither additional Ca(2+) nor heat shock is required. Instead, transformation is stimulated by agar. The membrane protein OmpA, a gated pore permeable to ions and larger solutes, serves as a receptor for DNA transfer during bacteriophage infection and conjugation. However, it remains unknown how DNA transfers across membranes and whether OmpA is involved in transformation of E. coli. Here, we explored potential roles of OmpA in natural and chemical transformation of E. coli. We observed that ompA inactivation significantly improved natural transformation on agar plates, indicating that OmpA blocks DNA transfer. Transformation promotion by ompA inactivation also occurred on soft plates, indicating that OmpA blocks DNA transfer independent of agar. By contrast, compared with the wild-type strain, chemical transformation of the ompA mutant was lower, indicating that OmpA has a role in DNA transfer. Inactivation of ompA also reduced chemical transformation in solution containing less Ca(2+) or with a shortened time for heat shock, suggesting that the promotion effect of OmpA on DNA transfer does not solely rely on Ca(2+) or heat shock. We conclude that OmpA plays opposite roles in natural and chemical transformation: it blocks DNA uptake on agar plates but promotes DNA transfer in the liquid Ca(2+) solution. Considering that no single factor was identified to reverse the function of OmpA, we propose that multiple factors may cooperate in the functional reversal of OmpA during natural and artificial transformation of E. coli. Finally, we observed that ompA transcription was not affected by the expression of RpoS, excluding the possibility that RpoS regulates DNA transfer by suppressing ompA transcription.
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