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  • 1
    Electronic Resource
    Electronic Resource
    The copy number of the catabolic plasmid pJP4 affects growth of Ralstonia eutropha JMP134 (pJP4) on 3-chlorobenzoate (2002)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 212 (2002), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Ralstonia eutropha JMP134 (pJP4) grows on 3-chlorobenzoate (3-CB) or 2,4-dichlorophenoxyacetate (2,4-D). The copy number of chlorocatechol genes has been observed to be important for allowing growth of bacterial strains on chloroaromatic compounds. Despite the fact that two functional chlorocatechol degradation tfd gene clusters are harbored on plasmid pJP4, a single copy of the region comprising all tfd genes in strain JMP134-F was insufficient to allow growth on 3-CB, whereas growth on 2,4-D was only slightly retarded compared to the wild-type strain. Using competitive PCR, approximately five copies of pJP4 per genome were observed to be present in the wild-type strain, whereas only one copy of pJP4 was present per chromosome in strain JMP134-F. Therefore, several copies of pJP4 per chromosome are required for full expression of the tfd-encoded growth abilities in the wild-type R. eutropha strain.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.2002.tb11250.x
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  • 2
    Electronic Resource
    Electronic Resource
    Degradation of trichlorophenols by Alcaligenes eutrophus JMP134 (1995)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 127 (1995), S. 0 
    Details
    ISSN: 1574-6968
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract The degradation of chlorophenols by Alcaligenes eutrophus JMP134 (pJP4) was studied. The strain grew on 2,4,6-trichlorophenol or 2,4,6-tribromophenol as the sole carbon and energy source. Complete degradation of 2,4,6-trichlorophenol was confirmed by chloride release and gas chromatography analysis of supernatants from growth cultures. The 2,3,5-, 2,3,4-, 2,3,6-and 2,4,5-isomers of trichlorophenol did not support growth. However, up to 40% of 2,4,5-trichlorophenol was mineralized during growth of A. eutrophus on chemostats fed with either phenol (0.4 mM) or 2,4,6-trichlorophenol (0.4 mM) plus 2,4,5-trichlorophenol (0.1 mM). Growth on 2,4,6-trihalophenols was also observed in A. Eutrophus JMP222, the strain lacking pJP4, suggesting that this new degradative ability reported for A. eutrophus is not related to pJP4 encoded catabolic functions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1574-6968.1995.tb07449.x
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    Paper (German National Licenses)
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