Cited by 204Probiotics and Fermented FoodsBacterial Genetics and BiotechnologyGenomics and Phylogenetic Studies

Genome Sequence of Lactobacillus helveticus , an Organism Distinguished by Selective Gene Loss and Insertion Sequence Element Expansion

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Callanan, Michael, Kaleta, Pawel, O'Callaghan, John, O'Sullivan, Orla, Jordan, Kieran, McAuliffe, Olivia, Sangrador-Vegas, Amaia, Slattery, Lydia +3 more·2008·Journal of Bacteriology

Abstract

Mobile genetic elements are major contributing factors to the generation of genetic diversity in prokaryotic organisms. For example, insertion sequence (IS) elements have been shown to specifically contribute to niche adaptation by promoting a variety of genetic rearrangements. The complete genome sequence of the cheese culture Lactobacillus helveticus DPC 4571 was determined and revealed significant conservation compared to three nondairy gut lactobacilli. Despite originating from significantly different environments, 65 to 75% of the genes were conserved between the commensal and dairy lactobacilli, which allowed key niche-specific gene sets to be described. However, the primary distinguishing feature was 213 IS elements in the DPC 4571 genome, 10 times more than for the other lactobacilli. Moreover, genome alignments revealed an unprecedented level of genome stability between these four Lactobacillus species, considering the number of IS elements in the L. helveticus genome. Comparative analysis also indicated that the IS elements were not the primary agents of niche adaptation for the L. helveticus genome. A clear bias toward the loss of genes reported to be important for gut colonization was observed for the cheese culture, but there was no clear evidence of IS-associated gene deletion and decay for the majority of genes lost. Furthermore, an extraordinary level of sequence diversity exists between copies of certain IS elements in the DPC 4571 genome, indicating they may represent an ancient component of the L. helveticus genome. These data suggest a special unobtrusive relationship between the DPC 4571 genome and its mobile DNA complement.

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Crossref · 10.1128/jb.01295-07

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  • Strain DPC4571 possesses three peptide transport systems: the oligopeptide Opp transport system and the di- and tri-peptide transport systems Dpp and DtpT.

    “it was determined that strain DPC4571 possesses three peptide transport systems, the oligopeptide Opp transport system and the di- and tri-peptide transport system, Dpp and DtpT, respectively.”

    From Lactobacillus helveticus: the proteolytic system (2013) · cites this paper as Callanan et al., 2008

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Authors
Callanan, M., Kaleta, P., O'Callaghan, J., O'Sullivan, O., Jordan, K., McAuliffe, O., Sangrador-Vegas, A., Slattery, L., Fitzgerald, G. F., Beresford, T., & Ross, R. P.
Affiliations
  • Teagasc - The Irish Agriculture and Food Development Authority (IE)
  • Teagasc, Moorepark Food Research Centre, Moorepark, Fermoy, County Cork, Ireland
  • APC Microbiome Institute (IE)
Corresponding author
Beresford, Tom
Venue
Journal of Bacteriology
Published
2008-01-15
Volume
190
Issue
2
Pages
727-735
ISSN
  • 0021-9193 (ISSN-L)
  • 1098-5530
OpenAlex
W2119255453
Cited by
204
References
3
Citations by year
2026: 2 · 2025: 7 · 2024: 3 · 2023: 7 · 2022: 8 · 2021: 3 · 2020: 4 · 2019: 2 · 2018: 7 · 2017: 12 · 2016: 4 · 2015: 14 · 2014: 22 · 2013: 19 · 2012: 15
FWCI
28.76
Type
journal article
Language
en
Open access
Locations
  • Journal of Bacteriology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
Food Institutional Research Measure
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
Keywords
Lactobacillus helveticus, insertion sequences, mobile genetic elements, cheese cultures, gene loss, niche adaptation, comparative genomics, genome stability, sequence diversity, Lactobacillus
MeSH terms
Base Sequence, Chromosomes, Bacterial, DNA Transposable Elements, DNA, Bacterial, Genes, Bacterial, Molecular Sequence Data, Polymorphism, Genetic, Genome, Bacterial, Conserved Sequence, Gene Deletion, Sequence Analysis, DNA, Synteny, Lactobacillus helveticus

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