Cited by 24Probiotics and Fermented FoodsBacterial Genetics and BiotechnologyMicrobial Metabolic Engineering and Bioproduction

Complete Genome Sequence of the Newly Developed Lactobacillus acidophilus Strain With Improved Thermal Adaptability

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Jeon, Soomin, Kim, Hyaekang, Choi, Youngseok, Cho, Seoae, Seo, Minseok, Kim, Heebal·2021·Frontiers in Microbiology

Abstract

Lactobacillus acidophilus (L. acidophilus) is a representative probiotic and is widely used in many industrial products for its beneficial effects on human and animal health. This bacterium is exposed to harsh environments such as high temperatures for manufacturing industrial products, but cell yield under high temperatures is relatively low. To resolve this issue, we developed a new L. acidophilus strain with improved heat resistance while retaining the existing beneficial properties through the adaptive laboratory evolution (ALE) method. The newly developed strain, L. acidophilus EG008, has improved the existing limit of thermal resistance from 65°C to 75°C. Furthermore, we performed whole-genome sequencing and comparative genome analysis of wild-type and EG008 strains to unravel the molecular mechanism of improved heat resistance. Interestingly, only two single-nucleotide polymorphisms (SNPs) were different compared to the L. acidophilus wild-type. We identified that one of these SNPs is a non-synonymous SNP capable of altering the structure of MurD protein through the 435th amino acid change from serine to threonine. We believe that these results will directly contribute to any industrial field where L. acidophilus is applied. In addition, these results make a step forward in understanding the molecular mechanisms of lactic acid bacteria evolution under extreme conditions.

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Crossref · 10.3389/fmicb.2021.697351

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  • LAB with high resistance to harsh conditions such as acidic pH and bile salts colonize various environments and offer numerous health benefits due to their probiotic properties.

    “With high resistance to harsh conditions such as acidic pH and bile salts, LAB not only colonize various environments, but also offer numerous health benefits due to their probiotic properties4.”

    From Probiotic potential of Lactobacillus acidophilus TMPC 41127 isolated from traditional cheese in inhibiting Salmonella Typhi biofilms and virulence genes (2026) · cites this paper as [4]

    The Introduction (page not available in our copy) says LAB resist acids and bile salts and can inhibit pathogens; it also describes several health benefits of L. acidophilus, a LAB species. It does not say that this resistance enables LAB to colonize various environments. (LLM, conf=0.85)

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1 of the 81 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. Dash S. K. (2004). Review of scientific evidence for efficacy of Lactobacillus acidophilus DDS-1 as a probiotic strain. Agro Food Ind. Hi Tech 15 23– 26.

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Authors
Jeon, S., Kim, H., Choi, Y., Cho, S., Seo, M., & Kim, H.
Affiliations
  • Seoul National University (KR)
  • Korea University (KR)
Corresponding author
  • Seo, Minseok
  • Kim, Heebal
Venue
Frontiers in Microbiology
Published
2021-09-24
Volume
12
Pages
697351-697351
ISSN
1664-302X (ISSN-L)
OpenAlex
W3202847747
Cited by
23
References
81
Citations by year
2026: 2 · 2025: 8 · 2024: 4 · 2023: 6 · 2022: 3
FWCI
1.94
Type
journal article
Language
en
Open access
Locations
  • Frontiers in Microbiology (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, other-oa)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • National Research Foundation (2021R1A5A8032895)
  • Korea University (2021R1A5A8032895)
  • National Research Foundation of Korea (2021R1A5A8032895)
  • Ministry of Science and ICT, South Korea (2021R1A5A8032895)
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 › Microbial Metabolic Engineering and Bioproduction
Keywords
Lactobacillus acidophilus, heat resistance, thermal adaptability, adaptive laboratory evolution, probiotics, whole genome sequencing, comparative genomics, single nucleotide polymorphisms

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