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Meng J, Wang YY, Hao YP. Application of two glycosylated Lactobacillus surface layer proteins in coating cationic liposomes. World J Microbiol Biotechnol 2023; 39:108. [PMID: 36856865 DOI: 10.1007/s11274-023-03549-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 02/14/2023] [Indexed: 03/02/2023]
Abstract
The ability of isolated surface layer proteins (SLPs) to reassemble on suitable surfaces enables the application of SLPs in various fields of nanotechnology. In this work, SLPs from Lactobacillus buchneri BNCC 187,964 and L. kefir BNCC 190,565 were extracted and verified as glycosylated proteins. They were applied to coat on the surface of cationic liposomes. The absorption of the two SLPs on liposomes induced the zeta potential reduction and particle size increase. The two kinds of SLP-coated liposomes demonstrated better thermal, light and pH stability than the control liposomes. And the L. kefir SLP showed better protective effects than the L. buchneri SLP. Moreover, both of the SLPs could endow liposomes with the function of binding ferritin as observed by transmission electron microscope. Fourier transform infrared spectroscopy illustrated that the interaction between the two SLPs and liposomes was similar. The recrystallization of the two SLPs on the liposomes might drive the lipid into a higher order state and hydrogen bonds were formed between the two SLPs and the liposomes. All the findings demonstrated that L. kefir SLP and L. buchneri SLP had great potential to be explored as effective coating agents to improve the stability and function of cationic liposomes.Please check and confirm that the authors and their respective affiliations have been correctly identified and amend if necessary.Yes, all have been checked.
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Affiliation(s)
- Jun Meng
- College of Food Science and Engineering, Henan University of Technology, 100 Lianhua Road, 450001, Zhengzhou, Henan Province, China.
| | - Yan-Yang Wang
- College of Food Science and Engineering, Henan University of Technology, 100 Lianhua Road, 450001, Zhengzhou, Henan Province, China
| | - Yun-Peng Hao
- College of Food Science and Technology, Henan Agricultural University, 95 Wenhua Road, 450002, Zhengzhou, Henan Province, China
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Jiang X, Pan D, Tao M, Zhang T, Zeng X, Wu Z, Guo Y. New Nanocarrier System for Liposomes Coated with Lactobacillus acidophilus S-Layer Protein to Improve Leu-Gln-Pro-Glu Absorption through the Intestinal Epithelium. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2021; 69:7593-7602. [PMID: 34190554 DOI: 10.1021/acs.jafc.1c01498] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The present study describes the development of a novel liposome nanocarrier system. The liposome was coated with Lactobacillus acidophilus CICC 6074 S-layer protein (SLP) to improve the intestinal absorption of the cholesterol-lowering peptide Leu-Gln-Pro-Glu (LQPE). The SLP-coated liposomes were prepared and characterized with morphology, particle size, zeta potential, membrane stability, Fourier transform infrared spectroscopy, and dual-channel surface plasma resonance. The results showed that SLP could successfully self-assemble on liposomes. Then, LQPE liposomes and SLP-coated LQPE liposomes (SLP-L-LQPE) were prepared. SLP-L-LQPE not only showed better sustained release properties and gastrointestinal tolerance in vitro but also increased the retention time in mice intestine. Transepithelial transport experiment indicates that the transshipment of LQPE increased significantly after being embedded by liposomes and coated with SLP. The research provides a theoretical basis for the study of SLP-coated liposomes and a potential drug delivery system for improving the intestinal absorption of peptides.
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Affiliation(s)
- Xiaoxiao Jiang
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, Jiangsu, China
| | - Daodong Pan
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315211, Zhejiang, P. R. China
| | - Mingxuan Tao
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, Jiangsu, China
| | - Tao Zhang
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, Jiangsu, China
| | - Xiaoqun Zeng
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315211, Zhejiang, P. R. China
| | - Zhen Wu
- College of Food and Pharmaceutical Sciences, Ningbo University, Ningbo 315211, Zhejiang, P. R. China
| | - Yuxing Guo
- Department of Food Science and Technology, School of Food Science and Pharmaceutical Engineering, Nanjing Normal University, Nanjing 210023, Jiangsu, China
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Mobarak Qamsari E, Kermanshahi RK, Erfan M, Ghadam P. Microencapsulation of Omeprazole by Lactobacillus acidophilus ATCC 4356 Surface Layer Protein and Evaluation of its Stability in Acidic Condition. IRANIAN JOURNAL OF PHARMACEUTICAL RESEARCH : IJPR 2021; 19:240-254. [PMID: 33841539 PMCID: PMC8019888 DOI: 10.22037/ijpr.2019.111681.13306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The present study introduces a novel method for encapsulation of the acid-labile drug called Omeprazole using Lactobacillus acidophilus (L. acidophilus) ATCC 4356 S-layer protein. Before preparing the Omeprazole suspension, a series of preliminary studies were performed on the Omeprazole powder. For this purpose, some parameters such as melting point, IR spectrum, UV spectrum, and the particle size of Omeprazole powder were investigated. The size reduction process was done in order to achieve an ideal formulation. Ultimately, the resulting powder had an average particle size of 35.516 μm and it was almost uniform. After calculating the amount of S-layer protein required for complete covering of drug particles, the effect of different factors on the drug coating process was investigated with one factor at a time method. Then stability of coated Omeprazole was evaluated in acetate buffer (pH 5). Finally, the maximum coat of drug particles was determined using S- layer protein of Lactobacillus acidophilus ATCC 4356 at 25 °C for 2 h, shaking rate of 100 rpm and ratio of 2:1 for S-layer protein amount/Omeprazole Surface in Tris hydrochloride buffer medium (50 mM, pH 8). The coating of Omeprazole by the S-layer protein decreased the drug decomposition rate up to 2.223.
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Affiliation(s)
- Elahe Mobarak Qamsari
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Rouha Kasra Kermanshahi
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
| | - Mohammad Erfan
- Department of Pharmaceutics, School of Pharmacy, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parinaz Ghadam
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, Iran
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Wang H, Cheng X, Zhang L, Xu S, Zhang Q, Lu R. A surface-layer protein from Lactobacillus acidophilus NCFM induces autophagic death in HCT116 cells requiring ROS-mediated modulation of mTOR and JNK signaling pathways. Food Funct 2020; 10:4102-4112. [PMID: 31233063 DOI: 10.1039/c9fo00109c] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
A surface-layer protein (Slp) derived from Lactobacillus acidophilus NCFM has been reported to possess multiple biological properties, including anti-inflammatory, inhibition of apoptosis in pathogen-invaded HT-29 cells and oxidative stress relief. However, its anti-tumor ability and underlying molecular mechanism are unknown. Here, we report that Slp suppresses cell proliferation and induces autophagic cell death in HCT116 cells. Accumulation of Beclin-1 and microtubule-associated protein 1 light chain 3 from II (LC3-II), and the degradation of p62 were observed when cells were treated with various concentrations of Slp (25, 50, 100 μg mL-1) for 24 h. We also found that the mammalian targets of rapamycin (mTOR) and c-Jun N-terminal kinase (JNK) signaling pathways were crucial mediators regulating Slp-induced autophagic cell death. Additionally, treatment with Slp resulted in the obvious formation of reactive oxygen species (ROS). SP600125, a JNK inhibitor, and N-acetylcysteine (NAC), a ROS inhibitor, attenuated Slp-induced autophagic cell death in HCT116 cells. Furthermore, NAC was found to prevent Slp-induced p70 and JNK phosphorylation. Taken together, our results suggest a novel mechanism of action of Slp induced autophagy, acting simultaneously through the ROS-mediated mTOR and JNK signaling pathways in HCT116 colon cancer cells.
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Affiliation(s)
- Huifang Wang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
| | - Xian Cheng
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, 20 Qian Rong, Wuxi, Jiangsu 214063, China
| | - Li Zhang
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, 20 Qian Rong, Wuxi, Jiangsu 214063, China
| | - Shichen Xu
- Jiangsu Institute of Nuclear Medicine, Key Laboratory of Nuclear Medicine, Ministry of Health, 20 Qian Rong, Wuxi, Jiangsu 214063, China
| | - Qiuxiang Zhang
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
| | - Rongrong Lu
- School of Food Science and Technology, Jiangnan University, 1800 Lihu Avenue, Wuxi, Jiangsu 214122, China.
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Luo G, Yang Q, Yao B, Tian Y, Hou R, Shao A, Li M, Feng Z, Wang W. Slp-coated liposomes for drug delivery and biomedical applications: potential and challenges. Int J Nanomedicine 2019; 14:1359-1383. [PMID: 30863066 PMCID: PMC6388732 DOI: 10.2147/ijn.s189935] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Slp forms a crystalline array of proteins on the outermost envelope of bacteria and archaea with a molecular weight of 40-200 kDa. Slp can self-assemble on the surface of liposomes in a proper environment via electrostatic interactions, which could be employed to functionalize liposomes by forming Slp-coated liposomes for various applications. Among the molecular characteristics, the stability, adhesion, and immobilization of biomacromolecules are regarded as the most meaningful. Compared to plain liposomes, Slp-coated liposomes show excellent physicochemical and biological stabilities. Recently, Slp-coated liposomes were shown to specifically adhere to the gastrointestinal tract, which was attributed to the "ligand-receptor interaction" effect. Furthermore, Slp as a "bridge" can immobilize functional biomacromol-ecules on the surface of liposomes via protein fusion technology or intermolecular forces, endowing liposomes with beneficial functions. In view of these favorable features, Slp-coated liposomes are highly likely to be an ideal platform for drug delivery and biomedical uses. This review aims to provide a general framework for the structure and characteristics of Slp and the interactions between Slp and liposomes, to highlight the unique properties and drug delivery as well as the biomedical applications of the Slp-coated liposomes, and to discuss the ongoing challenges and perspectives.
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Affiliation(s)
- Gan Luo
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
- Department of Anesthesiology and Intensive Care, The First Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qingliang Yang
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Bingpeng Yao
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
- Department of Green Pharmaceutics, Jianxing Honors College, Zhejiang University of Technology, Hangzhou, Zhejiang, China
| | - Yangfan Tian
- Department of Pediatric Surgery, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ruixia Hou
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Anna Shao
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Mengting Li
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Zilin Feng
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
| | - Wenxi Wang
- Department of Pharmaceutics, College of Pharmaceutical Science, Zhejiang University of Technology, Hangzhou, Zhejiang, China,
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Calienni MN, Temprana CF, Prieto MJ, Paolino D, Fresta M, Tekinay AB, Alonso SDV, Montanari J. Nano-formulation for topical treatment of precancerous lesions: skin penetration, in vitro, and in vivo toxicological evaluation. Drug Deliv Transl Res 2018; 8:496-514. [PMID: 29288359 DOI: 10.1007/s13346-017-0469-1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
With the aim of improving the topical delivery of the antineoplastic drug 5-fluorouracil (5FU), it was loaded into ultradeformable liposomes composed of soy phosphatidylcholine and sodium cholate (UDL-5FU). The liposome populations had a mean size of 70 nm without significant changes in 56 days, and the ultradeformable formulations were up to 324-fold more elastic than conventional liposomes. The interaction between 5FU and the liposomal membrane was studied by three methods, and also release profile was obtained. UDL-5FU did penetrate the stratum corneum of human skin. At in vitro experiments, the formulation was more toxic on a human melanoma-derived than on a human keratinocyte-derived cell line. Cells captured liposomes by metabolically active processes. In vivo toxicity experiments were carried out in zebrafish (Danio rerio) larvae by studying the swimming activity, morphological changes, and alterations in the heart rate after incubation. UDL-5FU was more toxic than free 5FU. Therefore, this nano-formulation could be useful for topical application in deep skin precancerous lesions with advantages over current treatments. This is the first work that assessed the induction of apoptosis, skin penetration in a Saarbrücken penetration model, and the toxicological effects in vivo of an ultradeformable 5FU-loaded formulation.
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Affiliation(s)
- Maria Natalia Calienni
- Laboratorio de Biomembranas, Departamento de Ciencia y Tecnología, GBEyB. IMBICE, CCT-LA PLATA, CONICET, Universidad Nacional de Quilmes, Bernal, B1876BXD, Buenos Aires, Argentina.,Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta", Viale S. Venuta, Germaneto, I-88100, Catanzaro, Italy
| | - Carlos Facundo Temprana
- Laboratorio de Inmunología y Virología (LIV), Departamento de Ciencia y Tecnología, CONICET, Universidad Nacional de Quilmes, B1876BXD, Bernal, Argentina
| | - Maria Jimena Prieto
- Laboratorio de Biomembranas, Departamento de Ciencia y Tecnología, GBEyB. IMBICE, CCT-LA PLATA, CONICET, Universidad Nacional de Quilmes, Bernal, B1876BXD, Buenos Aires, Argentina
| | - Donatella Paolino
- Department of Experimental and Clinical Medicine, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta", Viale S. Venuta, Germaneto, I-88100, Catanzaro, Italy
| | - Massimo Fresta
- Department of Health Sciences, University "Magna Græcia" of Catanzaro, Campus Universitario "S. Venuta", Viale S. Venuta, Germaneto, I-88100, Catanzaro, Italy
| | - Ayse Begum Tekinay
- Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800, Ankara, Turkey
| | - Silvia Del Valle Alonso
- Laboratorio de Biomembranas, Departamento de Ciencia y Tecnología, GBEyB. IMBICE, CCT-LA PLATA, CONICET, Universidad Nacional de Quilmes, Bernal, B1876BXD, Buenos Aires, Argentina
| | - Jorge Montanari
- Laboratorio de Biomembranas, Departamento de Ciencia y Tecnología, GBEyB. IMBICE, CCT-LA PLATA, CONICET, Universidad Nacional de Quilmes, Bernal, B1876BXD, Buenos Aires, Argentina. .,Institute of Materials Science and Nanotechnology, National Nanotechnology Research Center (UNAM), Bilkent University, 06800, Ankara, Turkey.
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Hollmann A, Delfederico L, Santos NC, Disalvo EA, Semorile L. Interaction of S-layer proteins of Lactobacillus kefir with model membranes and cells. J Liposome Res 2017; 28:117-125. [DOI: 10.1080/08982104.2017.1281950] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Axel Hollmann
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina,
- Laboratory of Biointerfaces and Biomimetic Systems- CITSE – National University of Santiago del Estero and CONICET, Argentina, and
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - Lucrecia Delfederico
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina,
| | - Nuno C. Santos
- Instituto de Medicina Molecular, Faculdade de Medicina, Universidade de Lisboa, Lisbon, Portugal
| | - E. Anibal Disalvo
- Laboratory of Biointerfaces and Biomimetic Systems- CITSE – National University of Santiago del Estero and CONICET, Argentina, and
| | - Liliana Semorile
- Laboratory of Molecular Microbiology, Institute of Basic and Applied Microbiology, National University of Quilmes, Bernal, Argentina,
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8
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Bioactive compounds as functional food ingredients: characterization in model system and sensory evaluation in chocolate milk. J FOOD ENG 2015. [DOI: 10.1016/j.jfoodeng.2015.05.007] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Kontro I, Wiedmer SK, Hynönen U, Penttilä PA, Palva A, Serimaa R. The structure of Lactobacillus brevis surface layer reassembled on liposomes differs from native structure as revealed by SAXS. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2014; 1838:2099-104. [DOI: 10.1016/j.bbamem.2014.04.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/24/2014] [Revised: 04/03/2014] [Accepted: 04/23/2014] [Indexed: 11/29/2022]
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Schuster B, Sleytr UB. Biomimetic interfaces based on S-layer proteins, lipid membranes and functional biomolecules. J R Soc Interface 2014; 11:20140232. [PMID: 24812051 PMCID: PMC4032536 DOI: 10.1098/rsif.2014.0232] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 04/15/2014] [Indexed: 12/20/2022] Open
Abstract
Designing and utilization of biomimetic membrane systems generated by bottom-up processes is a rapidly growing scientific and engineering field. Elucidation of the supramolecular construction principle of archaeal cell envelopes composed of S-layer stabilized lipid membranes led to new strategies for generating highly stable functional lipid membranes at meso- and macroscopic scale. In this review, we provide a state-of-the-art survey of how S-layer proteins, lipids and polymers may be used as basic building blocks for the assembly of S-layer-supported lipid membranes. These biomimetic membrane systems are distinguished by a nanopatterned fluidity, enhanced stability and longevity and, thus, provide a dedicated reconstitution matrix for membrane-active peptides and transmembrane proteins. Exciting areas in the (lab-on-a-) biochip technology are combining composite S-layer membrane systems involving specific membrane functions with the silicon world. Thus, it might become possible to create artificial noses or tongues, where many receptor proteins have to be exposed and read out simultaneously. Moreover, S-layer-coated liposomes and emulsomes copying virus envelopes constitute promising nanoformulations for the production of novel targeting, delivery, encapsulation and imaging systems.
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Affiliation(s)
- Bernhard Schuster
- Department of NanoBiotechnology, University of Natural Resources and Life Sciences, Institute for Synthetic Bioarchitectures, Muthgasse 11, 1190 Vienna, Austria
| | - Uwe B. Sleytr
- Department of NanoBiotechnology, University of Natural Resources and Life Sciences, Institute for Biophysics, Muthgasse 11, 1190 Vienna, Austria
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Evaluation of the Defay–Prigogine model for the membrane interphase in relation to biological response in membrane–protein interactions. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2013; 1828:1834-9. [DOI: 10.1016/j.bbamem.2013.03.026] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2012] [Revised: 03/26/2013] [Accepted: 03/28/2013] [Indexed: 11/17/2022]
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Hynönen U, Palva A. Lactobacillus surface layer proteins: structure, function and applications. Appl Microbiol Biotechnol 2013; 97:5225-43. [PMID: 23677442 PMCID: PMC3666127 DOI: 10.1007/s00253-013-4962-2] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2013] [Revised: 04/26/2013] [Accepted: 04/27/2013] [Indexed: 12/26/2022]
Abstract
Bacterial surface (S) layers are the outermost proteinaceous cell envelope structures found on members of nearly all taxonomic groups of bacteria and Archaea. They are composed of numerous identical subunits forming a symmetric, porous, lattice-like layer that completely covers the cell surface. The subunits are held together and attached to cell wall carbohydrates by non-covalent interactions, and they spontaneously reassemble in vitro by an entropy-driven process. Due to the low amino acid sequence similarity among S-layer proteins in general, verification of the presence of an S-layer on the bacterial cell surface usually requires electron microscopy. In lactobacilli, S-layer proteins have been detected on many but not all species. Lactobacillus S-layer proteins differ from those of other bacteria in their smaller size and high predicted pI. The positive charge in Lactobacillus S-layer proteins is concentrated in the more conserved cell wall binding domain, which can be either N- or C-terminal depending on the species. The more variable domain is responsible for the self-assembly of the monomers to a periodic structure. The biological functions of Lactobacillus S-layer proteins are poorly understood, but in some species S-layer proteins mediate bacterial adherence to host cells or extracellular matrix proteins or have protective or enzymatic functions. Lactobacillus S-layer proteins show potential for use as antigen carriers in live oral vaccine design because of their adhesive and immunomodulatory properties and the general non-pathogenicity of the species.
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Affiliation(s)
- Ulla Hynönen
- Department of Veterinary Biosciences, Division of Microbiology and Epidemiology, University of Helsinki, P.O. Box 66, 00014 Helsinki, Finland
| | - Airi Palva
- Department of Veterinary Biosciences, Division of Microbiology and Epidemiology, University of Helsinki, P.O. Box 66, 00014 Helsinki, Finland
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Hollmann A, Delfederico L, De Antoni G, Semorile L, Disalvo EA. Relaxation processes in the adsorption of surface layer proteins to lipid membranes. J Phys Chem B 2010; 114:16618-24. [PMID: 21086964 DOI: 10.1021/jp107062e] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The present work evaluates the kinetics of the interaction of S-layer protein from Lactobacillus brevis with lipid monolayers by measuring the changes in the surface pressure as a function of time for different lipid compositions and at different lateral compressions. At high surface pressures, or at high cholesterol ratios, in which membrane rigidity and surface polarity are increased, the kinetics can be described by a pure diffusional process. At low pressures or in the absence of cholesterol, the kinetics of protein interaction can be interpreted as a consequence of a relaxation process of the membrane structure coupled to diffusion. As the less packed monolayers are more hydrated, the relaxation processes at low initial surface pressures could be ascribed to changes in water organization in the membrane. These observations denote that kinetic insertion of proteins can be modulated by components that modify the hydration state of the interface.
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Affiliation(s)
- Axel Hollmann
- Laboratorio de Microbiología Molecular, DCyT, Universidad Nacional de Quilmes, Roque Sáenz Peña 352, Bernal, Argentina
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