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Sökning: WFRF:(Oh Ju Kyoung)

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  • Bagon, Bernadette B., et al. (författare)
  • Comparative exoproteome analyses of Lactobacillus spp. reveals species-and strain-specific proteins involved in their extracellular interaction and probiotic potential
  • 2018
  • Ingår i: Lebensmittel-Wissenschaft + Technologie. - : Elsevier. - 0023-6438 .- 1096-1127. ; 93, s. 420-426
  • Tidskriftsartikel (refereegranskat)abstract
    • Due to their health-promoting effects, the probiotic applications of lactobacilli have been investigated. Aside from their basic cellular functions, the extracellular activities of probiotic lactobacilli influence their establishment and interaction with the host. Many extracellular proteins play important roles in bacterial colonization and survival in their host's gastrointestinal environment. In this study, we compared the exoproteome of three lactobacillus strains isolated from the gastrointestinal tracts of pigs and chickens, namely, Lactobacillus mucosae LM1, L. johnsonii PF01, and L. johnsonii C1–10. Extracellular proteins collected in the mid-logarithmic growth phase were identified and quantified using a Q Exactive™ Orbitrap mass spectrometer (MS). Of 99 total extracellular proteins, 83% belonged to L. mucosae LM1; L. johnsonii PF01 strains had fewer extracellular proteins. Enolase, which is involved in the glycolysis pathway and has moonlighting functions in the adhesion of probiotic bacteria, was found in the core exoproteomes of the three strains. The most abundant proteins of each strain were phosphoketolase in L. mucosae LM1, aggregation-promoting factor in L. johnsonii PF01, and levansucrase in L. johnsonii C1–10. The observed differences between these three exoproteomes in terms of cellular and molecular function elucidate the extracellular activities of these isolates.
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  • Valeriano, Valerie Diane, et al. (författare)
  • Comparative genomic analysis of Lactobacillus mucosae LM1 identifies potential niche-specific genes and pathways for gastrointestinal adaptation
  • 2019
  • Ingår i: Genomics. - : Elsevier. - 0888-7543 .- 1089-8646. ; 111:1, s. 24-33
  • Tidskriftsartikel (refereegranskat)abstract
    • Lactobacillus mucosae is currently of interest as putative probiotics due to their metabolic capabilities and ability to colonize host mucosal niches. L. mucosae LM1 has been studied in its functions in cell adhesion and pathogen inhibition, etc. It demonstrated unique abilities to use energy from carbohydrate and non-carbohydrate sources. Due to these functions, we report the first complete genome sequence of an L. mucosae strain, L. mucosae LM1. Analysis of the pan-genome in comparison with closely-related Lactobacillus species identified a complete glycogen metabolism pathway, as well as folate biosynthesis, complementing previous proteomic data on the LM1 strain. It also revealed common and unique niche-adaptation genes among the various L. mucosae strains. The aim of this study was to derive genomic information that would reveal the probable mechanisms underlying the probiotic effect of L. mucosae LM1, and provide a better understanding of the nature of L. mucosae sp.
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