Mechanisms of DNA Uptake by Naturally Competent Bacteria
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The outer membranes of many gram-negative bacteria contain a major heat-modifiable protein which shows serological cross-reactivity with the OmpA protein of Escherichia coli K-12. Using the cloned gene for the E. coli K12 protein as a DNA-DNA hybridization ...
BACKGROUND: Compromised barrier function and intestinal inflammation are common complications of total parenteral nutrition (TPN). OBJECTIVE: We tested the hypothesis that the lack of enteral nutrients in TPN might select commensal or pathogenic bacteria t ...
The replication functions of the bacteriocinogenic plasmid pIP404, from Clostridium perfringens, were localized to a 2.8-kb EcoRI-EcoRV fragment by cloning into a vector deficient for replication in Bacillus subtilis. This fragment contains two genes, cop ...
During light organ colonization of the squid Euprymna scolopes by Vibrio fischeri, host-derived mucus provides a surface upon which environmental V. fischeri forms a biofilm and aggregates prior to colonization. In this study we defined the temporal and sp ...
The genus Mycobacterium is composed of species with widely differing growth rates ranging from approximately three hours in Mycobacterium smegmatis to two weeks in Mycobacterium leprae. As DNA replication is coupled to cell duplication, it may be regulated ...
Clostridium perfringens strain CPN50 harbours a 10.2 kb plasmid known as pIP404 which, in addition to a set of UV-inducible genes involved in bacteriocin production, carries res, a gene probably encoding a site-specific recombinase. The RES protein is high ...
Natural competence for transformation is a primary mode of horizontal gene transfer (HGT). Competent bacteria are able to absorb free DNA from their surroundings and exchange this DNA against pieces of their own genome when sufficiently homologous. And whi ...
Type III protein secretion (TTS) is catalyzed by translocases that span both membranes of Gram-negative bacteria. A hydrophilic TTS component homologous to F-1/V-1-ATPases is ubiquitous and essential for secretion. We show that hrcN encodes the putative TT ...
American Society for Biochemistry & Molecular Biology (ASBMB)2003
Arsenic redox cycling was examined in source waters of the Los Angeles Aqueduct, specifically at Hot Creek, a tributary of the Owens River. Elevated arsenic concentrations in Hot Creek result from geothermal inputs. Total arsenic and As(III) concentrations ...
