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Results for “ALCALIGENES”

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At least 829 records · Page 46Linked to original sources
PubMed1995

The czc operon of Alcaligenes eutrophus CH34: from resistance mechanism to the removal of heavy metals.

The plasmid-borne czc operon ensures for resistance to Cd2+, Zn2+ and Co2+ ions through a tricomponent export pathway and is associated to various conjugative plasmids of A. eutrophus strains isolated from metal-contaminated industrial areas. The czc region of pMOL30 was reassessed especially for the segments located upstream and downstream the structural genes czc CBA. In cultures grown with high concentrations of heavy metals, czc-mediated efflux of cations is followed by a process of metal bioprecipitation. These observations led to the development of bioreactors designed for the removal of heavy metals from polluted effluents.

ATP-Binding Cassette Transporters↗
PubMed2001

Introduction of green fluorescent protein gene into phenol-degrading Alcaligenes faecalis cells and their monitoring in phenol-contaminated soil.

Alcaligenesfaecalis (CCT 7145) was isolated from an Amazonian soil sample after an enrichment process to select for phenol-degrading microorganisms. The isolate was labeled with the green fluorescent protein (gfp) gene. The gfp-transformed cells were easily detected using a hand-held UV transilluminator and their taxonomy was confirmed by 16S rRNA sequencing. Polymerase chain reaction (PCR) and Southern blot analyses confirmed that the gfp gene was integrated into the chromosome. The addition of the gfp marker did not affect phenol degradation ability compared with the wild-type. Both, wild-type and gfp-marked A. faecalis cells encapsulated in alginate, tolerated 1,700 microg ml(-1) phenol in liquid medium compared with 1,100 microg ml(-1) phenol for free cells. 14C-Phenol mineralization in soil microcosms was also enhanced by inoculation with encapsulated cells. Survival of gfp-marked cells in phenol-contaminated soil over 22 days was determined from plate counts using an epifluorescence microscope.

Alcaligenes↗