The role of the outer membrane in formaldehyde tolerance in Escherichia coli VU3695 and Halomonas sp. MAC
Article Abstract:
High molecular mass proteins present in the outer membrane of Escherichia coli VU3695 and Halomonas MAC make the bacterial cells resistant to high concentrations of formaldehyde. These proteins are either absent or present in low concentrations in formaldehyde sensitive mutants. The resistance is not due to formaldehyde dehydrogenase, as high levels of the enzyme are unable to make the cells formaldehyde-tolerant. Treatment of the cells with EDTA has no effect on formaldehyde dehydrogenase but increases sensitivity to formaldehyde probably by increasing the membrane permeability.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Copper-inducible transcriptional regulation at two promoters in the Escherichia coli copper resistance determinant pco
Article Abstract:
The transcriptional characterization of the regulatory system that controls the inducible expression of pco-encoded copper resistance was reported. The two copper-dependent promoters found within the pco determinant were PpcoA and PpcoE, which both differ in structure and relative activity. The pco-encoded copper resistance system was seen as an auxiliary copper control mechanism for the cell.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Metal-ion tolerance in Escherichia coli: analysis of transcriptional profiles by gene-array technology
Article Abstract:
The transcript level of several genes involved in the transposition of IS elements was increased in E. coli exposed to toxic levels of Zn(II), Cd(II), Co(II), and Ni(II). In particular, insA gene expression increased. This gene may be involved in metal tolerance.
Publication Name: Microbiology
Subject: Biological sciences
ISSN: 1350-0872
Year: 2000
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Influence of the RpoS (KatF) sigma factor maintenance of viability and culturability of Escherichia coli and Salmonella typhimurium in seawater
- Abstracts: A 17 kDa outer-membrane protein (Omp4) from Serratia marcescens confers partial resistance to bacteriocin 28b when expressed in Escherichia coli
- Abstracts: Comparison of selected methods for the enumeration of fecal coliforms and Escherichia coli in shellfish. Three-year study to assess human enteric viruses in shellfish
- Abstracts: Comparison of methods for isolation of mycobacteria from water. Isolation of Mycobacteria from frozen fish destined for human consumption
- Abstracts: Primate spermatogenesis: New insights into comparative testicular organization, spermatogenic efficiency and endocrine control