Cited by 35Probiotics and Fermented FoodsGenomics and Phylogenetic StudiesBacterial Genetics and Biotechnology

Subspecies-level genome comparison of Lactobacillus delbrueckii

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Baek, Min-gyung, Kim, Kwan Woo, Yi, Hana·2023·Scientific Reports

Abstract

Lactobacillus delbrueckii comprises six subspecies, L. delbrueckii subsp. bulgaricus, L. delbrueckii subsp. lactis, L. delbrueckii subsp. jakobsenii, L. delbrueckii subsp. delbrueckii, L. delbrueckii subsp. sunkii, and L. delbrueckii subsp. indicus. We investigated the evolution of the six subspecies of L. delbrueckii using comparative genomics. While the defining feature of the species was the gene number increment driven by mobile elements and gene fragmentation, the repertoire of subspecies-specific gene gains and losses differed among the six subspecies. The horizontal gene transfer analyses indicated that frequent gene transfers between different subspecies had occurred when the six subspecies first diverged from the common ancestor, but recent gene exchange was confined to a subspecies implying independent evolution of the six subspecies. The subspecies bulgaricus is a homogeneous group that diverged from the other subspecies a long time ago and underwent convergent evolution. The subspecies lactis, jakobsenii, delbrueckii, and sunkii were more closely related to each other than to other subspecies. The four subspecies commonly show increasing genetic variability with increasing genome size. However, the four subspecies were distinguished by specific gene contents. The subspecies indicus forms a branch distant from the other subspecies and shows an independent evolutionary trend. These results could explain the differences in the habitat and nutritional requirements of the subspecies of L. delbrueckii.

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Authors
Baek, M.-G., Kim, K. W., & Yi, H.
Affiliations
Korea University (KR)
Corresponding author
Yi, Hana
Venue
Scientific Reports
Published
2023-02-23
Volume
13
Issue
1
Pages
3171-3171
ISSN
2045-2322 (ISSN-L)
OpenAlex
W4321616888
Cited by
35
References
30
Citations by year
2026: 8 · 2025: 9 · 2024: 15 · 2023: 3
FWCI
5.05
Type
journal article
Language
en
Open access
Locations
  • Scientific Reports (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Research Foundation
  • National Research Foundation of Korea
  • Ministry of Science and ICT, South Korea
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Phylogenetic Studies
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
Keywords
Lactobacillus delbrueckii, comparative genomics, horizontal gene transfer, transposable elements, gene fragmentation, gene gain and loss, convergent evolution, subspecies differentiation, genome size, Lactobacillus bulgaricus, Lactobacillus delbrueckii subsp. lactis, bacterial evolution
MeSH terms
Biological Evolution, Genome, Bacterial, Gene Transfer, Horizontal, Lactobacillus delbrueckii

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