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  • Key words: Chironomus — Satellite DNA — Tandem-repetitive DNA — Molecular Evolution  (1)
  • Paenibacillus (Bacillus) macerans  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Complex Evolution of Tandem-Repetitive DNA in the Chironomus thummi Species Group (1997)
    Springer
    Journal of molecular evolution 44 (1997), S. 321 -326 
    Details
    ISSN: 1432-1432
    Keywords: Key words: Chironomus — Satellite DNA — Tandem-repetitive DNA — Molecular Evolution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. The subspecies Chironomus thummi thummi and C. t. piger display dramatic differences in the copy number and chromosomal localization of a tandemly repeated DNA family (Cla elements). In order to analyze the evolutionary dynamics of this repeat family, we studied the organization of Cla elements in the related outgroup species C. luridus. We find three different patterns of Cla element organization in C. luridus, showing that Cla elements may be either strictly tandem-repetitive or be an integral part of two higher-order tandem repeats (i.e., Hinf[lur] elements, Sal[lur] elements). All three types of Cla-related repeats are localized in the centromeres of C. luridus chromosomes. This suggests that the dispersed chromosomal localization of Cla elements in C. t. thummi may be the result of an amplification and transposition during evolution of this subspecies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00006149
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  • 2
    Electronic Resource
    Electronic Resource
    Expression of the succinate dehydrogenase genes (sdhCAB) from the facultatively anaerobic Paenibacillus macerans during aerobic growth (1998)
    Springer
    Archives of microbiology 170 (1998), S. 304-308 
    Details
    ISSN: 1432-072X
    Keywords: Key words Succinate dehydrogenase ; sdhCAB genes ; Fumarate reductase ; Menaquinone ; Paenibacillus (Bacillus) macerans
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Paenibacillus (formerly Bacillus) macerans is capable of succinate oxidation under oxic conditions and fumarate reduction under anoxic conditions. The reactions are catalyzed by different enzymes, succinate dehydrogenase (Sdh) and fumarate reductase (Frd). The genes encoding Sdh (sdhCAB) were analyzed. The gene products of sdhA and sdhB were similar to the subunits of known Sdh and Frd enzymes. The hydrophobic subunit SdhC showed close sequence similarity to the class of Sdh/Frd enzymes containing diheme cytochrome b. From the sdhCAB gene cluster two transcripts were produced, one comprising sdhCAB, the other sdhAB. The transcripts were found only during aerobic growth, and the amount was directly proportional to Sdh activity, but inversely proportional to Frd activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002030050646
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