1
|
Kong W, Gan J, Su M, Xiong B, Jiang X, Zhang T, Zeng X, Wu Z, Sun Y, Pan D, Liu Q, Ling N, Guo Y. Identification and Characterization of Domains Responsible for Cell Wall Binding, Self-Assembly, and Adhesion of S-layer Protein from Lactobacillus acidophilus CICC 6074. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12982-12989. [PMID: 36190122 DOI: 10.1021/acs.jafc.2c03907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Lactobacillus S-layer protein (SLP) is a biologically active protein on the cell surface. To further elucidate the structures and functions of SLP in Lactobacillus acidophilus CICC 6074, this study was conducted to identify the functional domains of SLP which is responsible for cell wall anchoring, self-assembly, and adhesion. The gene (slpA) of L. acidophilus CICC 6074 SLP was amplified by polymerase chain reaction and speculated functional domains. Fusion proteins of C-terminal truncations from SLP were exogenously expressed in Escherichia coli BL21 (DE3). FITC-labeling N-terminal truncations of SLP were synthesized. The C-terminal domain was more likely to be the binding region, and the cell wall-anchored receptor of SLP was teichoic acid. Furthermore, N-terminal truncations could self-assemble to milk fat globule membrane polar lipid liposomes observed using a fluorescence microscope. Notably, SAN1 (region 32-55) of N-terminal truncations was mainly responsible for the adhesion of SLP to HT-29 cells. These results showed that SLP played a crucial role in the functions of L. acidophilus CICC 6074, which might be of significant reference value for future studies.
Collapse
Affiliation(s)
- Weimei Kong
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| | - Junai Gan
- Department of Food Science and Technology, University of California, Davis, California95616, United States
| | - Mi Su
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| | - Binyi Xiong
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| | - Xiaoxiao Jiang
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| | - Tao Zhang
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| | - Xiaoqun Zeng
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang315211, P. R. China
| | - Zhen Wu
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang315211, P. R. China
| | - Yangying Sun
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang315211, P. R. China
| | - Daodong Pan
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo, Zhejiang315211, P. R. China
| | - Qing Liu
- Nanjing Weigang Dairy Co., Ltd., Nanjing, Jiangsu211100, P. R. China
| | - Nan Ling
- Nanjing Weigang Dairy Co., Ltd., Nanjing, Jiangsu211100, P. R. China
| | - Yuxing Guo
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing, Jiangsu210023, P. R. China
| |
Collapse
|
2
|
Alnadari F, Xue Y, Alsubhi NH, Alamoudi SA, Alwabli AS, Al-Quwaie DA, Saud Hamed Y, Muhammad Nasiru M, Ebrahim AA, El-Saadony MT, Pan F. Reusability of immobilized β-glucosidase on sodium alginate-coated magnetic nanoparticles and high productivity applications. JOURNAL OF SAUDI CHEMICAL SOCIETY 2022. [DOI: 10.1016/j.jscs.2022.101517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
3
|
Gorreja F, Walker WA. The potential role of adherence factors in probiotic function in the gastrointestinal tract of adults and pediatrics: a narrative review of experimental and human studies. Gut Microbes 2022; 14:2149214. [PMID: 36469568 PMCID: PMC9728474 DOI: 10.1080/19490976.2022.2149214] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Accepted: 11/15/2022] [Indexed: 12/12/2022] Open
Abstract
Numerous studies point to the important role of probiotic bacteria in gastrointestinal health. Probiotics act through mechanisms affecting enteric pathogens, epithelial barrier function, immune signaling, and conditioning of indigenous microbiota. Once administered, probiotics reach the gastrointestinal tract and interact with the host through bacterial surface molecules, here called adhesion factors, which are either strain- or specie-specific. Probiotic adhesion, through structural adhesion factors, is a mechanism that facilitates persistence within the gastrointestinal tract and triggers the initial host responses. Thus, an understanding of specific probiotic adhesion mechanisms could predict how specific probiotic strains elicit benefits and the potential of adherence factors as a proxy to predict probiotic function. This review summarizes the present understanding of probiotic adherence in the gastrointestinal tract. It highlights the bacterial adhesion structure types, their molecular communication with the host and the consequent impact on intestinal diseases in both adult and pediatric populations. Finally, we discuss knockout/isolation studies as direct evidence for adhesion factors conferring anti-inflammatory and pathogen inhibition properties to a probiotic.What is known: Probiotics can be used to treat clinical conditions.Probiotics improve dysbiosis and symptoms.Clinical trials may not confirm in vitro and animal studies.What is new: Adhesion structures may be important for probiotic function.Need to systematically determine physical characteristics of probiotics before selecting for clinical trials.Probiotics may be genetically engineered to add to clinical efficacy.
Collapse
Affiliation(s)
- Frida Gorreja
- Department of Microbiology and Immunology, Institute for Biomedicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Nutrition-Gut-Brain Interactions Research Centre, School of Medical Sciences, Örebro University, Örebro, Sweden
| | - W. Allan Walker
- Mucosal Immunology and Biology Research Center, Massachusetts General Hospital for Children, Harvard Medical School, Boston, Massachusetts, USA
| |
Collapse
|
4
|
Fu M, Mao K, Gao J, Wang X, Sadiq FA, Li J, Sang Y. Characteristics of surface layer protein from Lactobacillus kefiri HBA20 and the role in mediating interactions with Saccharomyces cerevisiae Y8. Int J Biol Macromol 2021; 201:254-261. [PMID: 34952095 DOI: 10.1016/j.ijbiomac.2021.12.049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 12/07/2021] [Accepted: 12/07/2021] [Indexed: 11/18/2022]
Abstract
In this study, the surface layer protein (SLP) from Lactobacillus kefiri HBA20 was characterized. The SLP was extracted by 5 M LiCl. The molecular mass of the SLP was approximately 64 kDa as analyzed via SDS-PAGE. The surface morphology and the adhesion potential of L. kefiri HBA20 in the absence and presence of SLP were measured by AFM. Moreover, the protein secondary structure was evaluated by using circular dichroism (CD) and Fourier transform infrared spectroscopy (FTIR), respectively. SLP had high β-sheet contents and low content of α-helix. Thermal analysis of SLP of Lactobacillus kefiri HBA20 exhibited one transition peak at 129.64 °C. Furthermore, SEM measurements were showed that after the SLP were removed from the cell surface, the coaggregation ability with Saccharomyces cerevisiae Y8 of the strain was significantly reduced. In conclusion, the SLP of Lactobacillus kefiri HBA20 has a stable structure and the ability of adhesion to yeast. Molecular docking study revealed that mannan bind with the hydrophobic residues of SLP. Our results will help further understanding of the new surface layer protein and the interaction between L. kefiri and S. cerevisiae.
Collapse
Affiliation(s)
- Mengqi Fu
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | - Kemin Mao
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | - Jie Gao
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | - Xianghong Wang
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | | | - Jiale Li
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China
| | - Yaxin Sang
- Collage of Food Science and Technology, Hebei Agricultural University, Baoding, China.
| |
Collapse
|