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  • 1995-1999  (3)
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  • 1
    Digitale Medien
    Digitale Medien
    A small cryptic plasmid from Ruminobacter amylophilus NIAH-3 possesses functional mobilization properties (1999)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology letters 181 (1999), S. 0 
    Details
    ISSN: 1574-6968
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: The complete nucleotide sequence of a small cryptic plasmid designated pRAO1, from the Gram-negative ruminal bacterium Ruminobacter amylophilus NIAH-3, was determined. The plasmid is a circular DNA molecule, 2140 bp in size, with a GC content of 40%. Computer-assisted analysis identified three open reading frames (ORFs), one of which, ORF3 (347 amino acids), displayed a high degree of amino acid identity with the Mob proteins involved in conjugative mobilization and interplasmid recombination of plasmids from Gram-positive bacteria. We proved the mobilization properties of pRAO1 in the Escherichia coli system using the coresident IncW broad-host-range conjugative plasmid R388. These data demonstrated, for the first time, the mobilization properties of small cryptic plasmids from Gram-negative inhabitants of the rumen.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6968.1999.tb08824.x
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  • 2
    Digitale Medien
    Digitale Medien
    Rumen bacterial diversity as determined by sequence analysis of 16S rDNA libraries (1999)
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology ecology 29 (1999), S. 0 
    Details
    ISSN: 1574-6941
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: Molecular diversity of rumen bacteria was analyzed by PCR amplification and sequencing of 16S rDNA clone libraries prepared from the rumen content of Holstein cows fasted for 16 h. A total of 84 clones, containing almost full size 16S rDNA sequences (about 1.5 kb long), were completely sequenced and subjected to an on line similarity search. Four sequences from the 84 clones closely resembled that of Butyrivibrio fibrisolvens and one clone was found to be related to Treponema bryantii. For 38% of the sequences, the similarity with database sequences was in the range of 90%–98% and for the remaining 56% the similarity was less than 90%. The bacterial community structure was also revealed by phylogenetic placement of sequences in relation to different fractions of rumen content. In the library from the rumen fluid, the sequences were affiliated with the following major phyla: low G+C Gram-positive bacteria (52.4%), Cytophaga-Flexibacter-Bacteroides (38.1%), Proteobacteria (4.7%) and Spirochaetes (2.4%). 2.4% had an uncertain affiliation. The vast majority of sequences from the rumen solids were found to be related to low G+C Gram-positive bacteria (71.4%) and the remaining sequences were placed within the Cytophaga-Flexibacter-Bacteroides (26.2%) and Spirochaetes (2.4%) phyla.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1111/j.1574-6941.1999.tb00607.x
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  • 3
    Digitale Medien
    Digitale Medien
    Sequence Analysis of Small Cryptic Plasmids Isolated from Selenomonas ruminantium S20 (1999)
    Springer
    Current microbiology 38 (1999), S. 107-112 
    Details
    ISSN: 1432-0991
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract. Two small cryptic plasmids designated pONE429 and pONE430 were isolated from a rumen bacterium, Selenomonas ruminantium S20. The complete sequence of pONE429 was 2100 bp and contained one open reading frame (ORF) of 201 amino acids. The sequence of pONE430 had 1527 bp and one ORF of 171 amino acids with the similarity of replication protein (Rep protein) of pOM1, pSN2, and pIM13 isolated from Butyrivibrio fibrisolvens, Staphylococcus aureus, and Bacillus subtilis, respectively. In these plasmids, the upstream nucleotide sequence of Rep protein had the conserved nucleotides which could be double-strand origin (DSO) of rolling circle replication (RCR) mechanism. The plasmids of pONE429, pONE430, pJJMI, pJDB21, and pS23 were isolated from S. ruminantium strains and had similar regions that were located within a 〈450-bp nucleotide. These similar regions may be the location that was recognized by the host strain, S. ruminantium.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s002849900412
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