Cited by 21Probiotics and Fermented FoodsBiochemical and Structural CharacterizationReproductive tract infections research

Adhesions of extracellular surface-layer associated proteins in Lactobacillus M5-L and Q8-L

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Zhang, Yingchun, Xiang, Xinling, Lu, Qianhui, Zhang, Lanwei, Ma, Fang, Wang, Linlin·2016·Journal of Dairy Science

Abstract

Surface-layer associated proteins (SLAP) that envelop Lactobacillus paracasei ssp. paracasei M5-L and Lactobacillus casei Q8-L cell surfaces are involved in the adherence of these strain to the human intestinal cell line HT-29. To further elucidate some of the properties of these proteins, we assessed the yields and expressions of SLAP under different incubation conditions. An efficient and selective extraction of SLAP was obtained when cells of Lactobacillus were treated with 5 M LiCl at 37°C in aerobic conditions. The SLAP of Lactobacillus M5-L and Q8-L in cell extracts were visualized by SDS-PAGE and identified by Western blotting with sulfo-N-hydroxysuccinimide-biotin-labeled HT-29 cells as adhesion proteins. Atomic force microscopy contact imaging revealed that Lactobacillus strains M5-L and Q8-L normally display a smooth, homogeneous surface, whereas the surfaces of M5-L and Q8-L treated with 5 M LiCl were rough and more heterogeneous. Analysis of adhesion forces revealed that the initial adhesion forces of 1.41 and 1.28 nN obtained for normal Lactobacillus M5-L and Q8-L strains, respectively, decreased to 0.70 and 0.48 nN, respectively, following 5 M LiCl treatment. Finally, the dominant 45-kDa protein bands of Lactobacillus Q8-L and Lactobacillus M5-L were identified as elongation factor Tu and surface antigen, respectively, by liquid chromatography-tandem mass spectrometry.

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Authors
Zhang, Y., Xiang, X., Lu, Q., Zhang, L., Ma, F., & Wang, L.
Affiliations
Harbin Institute of Technology (CN)
Corresponding author
Zhang, Lanwei
Venue
Journal of Dairy Science
Published
2016-02
Volume
99
Issue
2
Pages
1011-1018
ISSN
0022-0302 (ISSN-L)
OpenAlex
W2218437816
Cited by
21
References
30
Citations by year
2026: 2 · 2025: 1 · 2024: 3 · 2022: 2 · 2021: 4 · 2020: 1 · 2018: 6 · 2017: 2
FWCI
3.57
Type
journal article
Language
en
Open access
Locations
  • Journal of Dairy Science (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (31301515)
  • China Postdoctoral Science Foundation (2012M510093, 2013T60382)
  • Natural Science Foundation of Heilongjiang Province (C201433)
  • Fundamental Research Funds for the Central Universities (HIT.NSRIF.2012082)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Food Science › Probiotics and Fermented Foods
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Biochemical and Structural Characterization
  • Life Sciences › Immunology and Microbiology › Microbiology › Reproductive tract infections research
Keywords
Lactobacillus casei, bacterial adhesion, HT-29 cells, intestinal epithelial cells, adhesion force, atomic force microscopy, elongation factor Tu, surface antigens, probiotic bacteria, cell surface
MeSH terms
Animals, Bacterial Adhesion, Bacterial Proteins, Biotin, Electrophoresis, Polyacrylamide Gel, Humans, Intestines, Lactobacillus, Membrane Glycoproteins, Succinimides, Blotting, Western, Gene Expression Regulation, Bacterial, HT29 Cells

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