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Isolation and bioinformatic analysis of a novel transposable element, ISCbe4, from the hyperthermophilic bacterium, Caldicellulosiruptor bescii

  • Genetics and Molecular Biology of Industrial Organisms
  • Published:
Journal of Industrial Microbiology & Biotechnology

Abstract

Caldicellulosiruptor bescii is an anaerobic thermophilic bacterium of special interest for use in the consolidated bioprocessing of plant biomass to biofuels. In the course of experiments to engineer pyruvate metabolism in C. bescii, we isolated a mutant of C. bescii that contained an insertion in the l-lactate dehydrogenase gene (ldh). PCR amplification and sequencing of the ldh gene from this mutant revealed a 1,609-bp insertion that contained a single open reading frame of 479 amino acids (1,440 bp) annotated as a hypothetical protein with unknown function. The ORF is flanked by an 8-base direct repeat sequence. Bioinformatic analysis indicated that this ORF is part of a novel transposable element, ISCbe4, which is only intact in the genus Caldicellulosiruptor, but has ancient relatives that are present in degraded (and previously unrecognized) forms across many bacterial and archaeal clades.

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Acknowledgments

We thank Jennifer Copeland for outstanding technical assistance, and Robert Kelly and Sara Blumer-Schuette for providing the wild-type Caldicellulosiruptor species. The BioEnergy Science Center is a U.S. Department of Energy Bioenergy Research Center supported by the Office of Biological and Environmental Research in the DOE Office of Science. This study was supported in part by resources and technical expertise from the Georgia Advanced Computing Resource Center, a partnership between the University of Georgia’s Office of the Vice President for Research and Office of the Vice President for Information Technology.

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Authors and Affiliations

  1. Department of Genetics, University of Georgia, Athens, GA, 30602, USA

    Minseok Cha, Hao Wang, Daehwan Chung, Jeffrey L. Bennetzen & Janet Westpheling

  2. The BioEnergy Science Center, Oak Ridge National Laboratory, Oak Ridge, TN, USA

    Minseok Cha, Hao Wang, Daehwan Chung, Jeffrey L. Bennetzen & Janet Westpheling

Authors
  1. Minseok Cha
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  2. Hao Wang
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  3. Daehwan Chung
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  4. Jeffrey L. Bennetzen
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  5. Janet Westpheling
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Corresponding author

Correspondence to Janet Westpheling.

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M. Cha and H. Wang contributed equally to this work.

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Cha, M., Wang, H., Chung, D. et al. Isolation and bioinformatic analysis of a novel transposable element, ISCbe4, from the hyperthermophilic bacterium, Caldicellulosiruptor bescii . J Ind Microbiol Biotechnol 40, 1443–1448 (2013). https://doi.org/10.1007/s10295-013-1345-8

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  • DOI: https://doi.org/10.1007/s10295-013-1345-8

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