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Song B, Wang W, Jia C, Han Z, Yang J, Yang J, Wu Z, Xu H, Qiao M. Identification and Characterization of a Predominant Hydrophobin in the Edible Mushroom Grifola frondosa. J Fungi (Basel) 2023; 10:25. [PMID: 38248935 PMCID: PMC10820438 DOI: 10.3390/jof10010025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2023] [Revised: 12/27/2023] [Accepted: 12/27/2023] [Indexed: 01/23/2024] Open
Abstract
Hydrophobins (HFBs) are a group of small, secreted amphipathic proteins of fungi with multiple physiological functions and potential commercial applications. In this study, HFB genes of the edible mushroom, Grifola frondosa, were systematically identified and characterized, and their transcriptional profiles during fungal development were determined. In total, 19 typical class I HFB genes were discovered and bioinformatically analyzed. Gene expression profile examination showed that Gf.hyd9954 was particularly highly upregulated during primordia formation, suggesting its major role as the predominant HFB in the lifecycle of G. frondosa. The wettability alteration profile and the surface modification ability of recombinant rGf.hyd9954 were greater than for the Grifola HFB HGFII-his. rGf.hyd9954 was also demonstrated to form the typical class I HFB characteristic-rodlet bundles. In addition, rGf.hyd9954 was shown to possess nanoparticle characteristics and emulsification activities. This research sheds light on the regulation of fungal development and its association with the expression of HFB genes.
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Affiliation(s)
- Bo Song
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Wenjun Wang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Chunhui Jia
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Zhiqiang Han
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Jiyuan Yang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Jiuxia Yang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Zhenzhou Wu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Haijin Xu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
| | - Mingqiang Qiao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300110, China; (B.S.)
- School of Life Science, Shanxi University, Taiyuan 030000, China
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2
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Ma Z, Song B, Yu L, Yang J, Han Z, Yang J, Wang B, Song D, Xu H, Qiao M. Efficient expression of hydrophobin HGFII-his via POT1-mediated δ integration strategy and its potential in curcumin nanoformulation. Colloids Surf A Physicochem Eng Asp 2023. [DOI: 10.1016/j.colsurfa.2022.130344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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3
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Interdisciplinary Overview of Lipopeptide and Protein-Containing Biosurfactants. Genes (Basel) 2022; 14:genes14010076. [PMID: 36672817 PMCID: PMC9859011 DOI: 10.3390/genes14010076] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 12/05/2022] [Accepted: 12/20/2022] [Indexed: 12/28/2022] Open
Abstract
Biosurfactants are amphipathic molecules capable of lowering interfacial and superficial tensions. Produced by living organisms, these compounds act the same as chemical surfactants but with a series of improvements, the most notable being biodegradability. Biosurfactants have a wide diversity of categories. Within these, lipopeptides are some of the more abundant and widely known. Protein-containing biosurfactants are much less studied and could be an interesting and valuable alternative. The harsh temperature, pH, and salinity conditions that target organisms can sustain need to be understood for better implementation. Here, we will explore biotechnological applications via lipopeptide and protein-containing biosurfactants. Also, we discuss their natural role and the organisms that produce them, taking a glimpse into the possibilities of research via meta-omics and machine learning.
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Jennings J, Webster-Aikman RR, Ward-O’Brien N, Xie A, Beattie DL, Deane OJ, Armes SP, Ryan AJ. Hydrocarbon-Based Statistical Copolymers Outperform Block Copolymers for Stabilization of Ethanol-Water Foams. ACS APPLIED MATERIALS & INTERFACES 2022; 14:39548-39559. [PMID: 35984897 PMCID: PMC9437873 DOI: 10.1021/acsami.2c09910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Accepted: 08/05/2022] [Indexed: 06/15/2023]
Abstract
Well-defined block copolymers have been widely used as emulsifiers, stabilizers, and dispersants in the chemical industry for at least 50 years. In contrast, nature employs amphiphilic proteins as polymeric surfactants whereby the spatial distribution of hydrophilic and hydrophobic amino acids within the polypeptide chains is optimized for surface activity. Herein, we report that polydisperse statistical copolymers prepared by conventional free-radical copolymerization can provide superior foaming performance compared to the analogous diblock copolymers. A series of predominantly (meth)acrylic comonomers are screened to identify optimal surface activity for foam stabilization of aqueous ethanol solutions. In particular, all-acrylic statistical copolymers comprising trimethylhexyl acrylate and poly(ethylene glycol) acrylate, P(TMHA-stat-PEGA), confer strong foamability and also lower the surface tension of a range of ethanol-water mixtures to a greater extent than the analogous block copolymers. For ethanol-rich hand sanitizer formulations, foam stabilization is normally achieved using environmentally persistent silicone-based copolymers or fluorinated surfactants. Herein, the best-performing fully hydrocarbon-based copolymer surfactants effectively stabilize ethanol-rich foams by a mechanism that resembles that of naturally-occurring proteins. This ability to reduce the surface tension of low-surface-energy liquids suggests a wide range of potential commercial applications.
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5
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Iddir M, Vahid F, Merten D, Larondelle Y, Bohn T. Influence of Proteins on the Absorption of Lipophilic Vitamins, Carotenoids and Curcumin - A Review. Mol Nutr Food Res 2022; 66:e2200076. [PMID: 35506751 DOI: 10.1002/mnfr.202200076] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Revised: 03/26/2022] [Indexed: 12/13/2022]
Abstract
While proteins have been widely used to encapsulate, protect, and regulate the release of bioactive food compounds, little is known about the influence of co-consumed proteins on the absorption of lipophilic constituents following digestion, such as vitamins (A, D, E, K), carotenoids, and curcumin. Their bioavailability is often low and very variable, depending on the food matrix and host factors. Some proteins can act as emulsifiers during digestion. Their liberated peptides have amphiphilic properties that can facilitate the absorption of microconstituents, by improving their transition from lipid droplets into mixed micelles. Contrarily, the less well digested proteins could negatively impinge on enzymatic accessibility to the lipid droplets, slowing down their processing into mixed micelles and entrapping apolar food compounds. Interactions with mixed micelles and proteins are also plausible, as shown earlier for drugs. This review focuses on the ability of proteins to act as effective emulsifiers of lipophilic vitamins, carotenoids, and curcumin during digestion. The functional properties of proteins, their chemical interactions with enzymes and food constituents during gastro-intestinal digestion, potentials and limitations for their use as emulsifiers are emphasized and data from human, animal, and in vitro trials are summarized.
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Affiliation(s)
- Mohammed Iddir
- Nutrition and Health Research Group, Department of Precision Health, Luxembourg Institute of Science and Technology, 1 A-B, rue Thomas Edison, Strassen, L-1445, Luxembourg.,Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, 1348, Belgium
| | - Farhad Vahid
- Nutrition and Health Research Group, Department of Precision Health, Luxembourg Institute of Science and Technology, 1 A-B, rue Thomas Edison, Strassen, L-1445, Luxembourg
| | - Diane Merten
- Nutrition and Health Research Group, Department of Precision Health, Luxembourg Institute of Science and Technology, 1 A-B, rue Thomas Edison, Strassen, L-1445, Luxembourg
| | - Yvan Larondelle
- Louvain Institute of Biomolecular Science and Technology, UCLouvain, Louvain-la-Neuve, 1348, Belgium
| | - Torsten Bohn
- Nutrition and Health Research Group, Department of Precision Health, Luxembourg Institute of Science and Technology, 1 A-B, rue Thomas Edison, Strassen, L-1445, Luxembourg
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6
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Moghadam SS, Ghahramani M, Khoshaman K, Oryan A, Moosavi-Movahedi AA, Kurganov BI, Yousefi R. Relationship between the Structure and Chaperone Activity of Human αA-Crystallin after Its Modification with Diabetes-Associated Oxidative Agents and Protective Role of Antioxidant Compounds. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:91-105. [PMID: 35508905 DOI: 10.1134/s000629792202002x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/12/2021] [Revised: 10/16/2021] [Accepted: 10/16/2021] [Indexed: 06/14/2023]
Abstract
The study was aimed to evaluate the impact of peroxynitrite (PON, oxidative stress agent in diabetes), methylglyoxal (MGO, diabetes-associated reactive carbonyl compound), and their simultaneous application on the structural and functional features of human αA-crystallin (αA-Cry) using various spectroscopy techniques. Additionally, the surface tension and oligomer size distribution of the treated and untreated protein were tested using tensiometric analysis and dynamic light scattering, respectively. Our results indicated that the reaction of PON and MGO with human αA-Cry leads to the formation of new chromophores, alterations in the secondary to quaternary protein structure, reduction in the size of protein oligomers, and significant enhancement in the chaperone activity of αA-Cry. To reverse the effects of the tested compounds, ascorbic acid and glutathione (main components of lens antioxidant defense system) were applied. As expected, the two antioxidant compounds significantly prevented formation of high molecular weight aggregates of αA-Cry (according to SDS-PAGE). Our results suggest that the lens antioxidant defense system, in particular, glutathione, may provide a strong protection against rapid incidence and progression of diabetic cataract by preventing the destructive reactions of highly reactive DM-associated metabolites.
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Affiliation(s)
- Sogand Sasan Moghadam
- Protein Chemistry Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Maryam Ghahramani
- Protein Chemistry Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Kazem Khoshaman
- Protein Chemistry Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran
| | - Ahmad Oryan
- Department of Pathology, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
| | | | - Boris I Kurganov
- Bach Institute of Biochemistry, Research Center of Biotechnology of the Russian Academy of Sciences, Moscow, 119071, Russia
| | - Reza Yousefi
- Protein Chemistry Laboratory, Department of Biology, College of Sciences, Shiraz University, Shiraz, Iran.
- Institute of Biochemistry and Biophysics (IBB), University of Tehran, Tehran, Iran
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7
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Hyun J, Chang R. Penetration of
C
60
into lung surfactant membranes: Molecular dynamics simulation studies. B KOREAN CHEM SOC 2022. [DOI: 10.1002/bkcs.12475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jiyeon Hyun
- Department of Physics University of Seoul Seoul South Korea
| | - Rakwoo Chang
- Department of Applied Chemistry University of Seoul Seoul South Korea
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8
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Ferraro DP. Combined phylogenetic analysis of Pleurodema (Anura: Leptodactylidae: Leiuperinae). Cladistics 2022; 38:301-319. [PMID: 34985147 DOI: 10.1111/cla.12497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/14/2021] [Indexed: 11/29/2022] Open
Abstract
The genus Pleurodema comprises 15 species distributed through the Neotropical region, from sea level up to 5000 m.a.s.l. A total-evidence analysis of Pleurodema is provided based on the parsimony criterion. The combined dataset included morphometric, phenotypic, and DNA evidence (34 taxa, 4441 characters). The parsimony analysis yielded one most-parsimonious tree. Pleurodema was recovered as a well-supported clade composed of two major subclades. One subclade has an identical topology to that of previous analyses, the P. brachyops Clade (P. alium, P. borellii, P. brachyops, P. cinereum, P. diplolister, and P. tucumanum). The other subclade includes the remaining nine species of the genus, exhibiting a topology different from that of previous studies. According to the present phylogeny, this second lineage is formed by the P. nebulosum Clade (P. guayapae + P. nebulosum), P. marmoratum, the re-defined P. thaul Clade (P. bufoninum, P. somuncurense, P. thaul) and the P. bibroni Clade (P. bibroni, P. cordobae, P. kriegi). The reproductive modes of Pleurodema represent a unique combination of features within Leiuperinae, including three egg-clutch structures, two types of amplexus, and lack of vocalization. Also, some species of Pleurodema have been considered fossorial, because they are capable of digging with their hind-limbs and remaining in self-made burrows during dry seasons. The evolution of characters associated with reproductive biology and fossoriality is discussed in light of the obtained results.
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Affiliation(s)
- Daiana Paola Ferraro
- División Herpetología, Museo Argentino de Ciencias Naturales "Bernardino Rivadavia" -CONICET, Ángel Gallardo 470, Buenos Aires, C1405DJR, Argentina
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9
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Pasquier C, Pezennec S, Bouchoux A, Cabane B, Lechevalier V, Le Floch-Fouéré C, Paboeuf G, Pasco M, Dollet B, Lee LT, Beaufils S. Protein Transport upon Advection at the Air/Water Interface: When Charge Matters. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:12278-12289. [PMID: 34636247 DOI: 10.1021/acs.langmuir.1c01591] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
The formation of dense protein interfacial layers at a free air-water interface is known to result from both diffusion and advection. Furthermore, protein interactions in concentrated phases are strongly dependent on their overall positive or negative net charge, which is controlled by the solution pH. As a consequence, an interesting question is whether the presence of an advection flow of water toward the interface during protein adsorption produces different kinetics and interfacial structure of the adsorbed layer, depending on the net charge of the involved proteins and, possibly, on the sign of this charge. Here we test a combination of the following parameters using ovalbumin and lysozyme as model proteins: positive or negative net charge and the presence or absence of advection flow. The formation and the organization of the interfacial layers are studied by neutron reflectivity and null-ellipsometry measurements. We show that the combined effect of a positive charge of lysozyme and ovalbumin and the presence of advection flow does induce the formation of interfacial multilayers. Conversely, negatively charged ovalbumin forms monolayers, whether advection flow is present or not. We show that an advection/diffusion model cannot correctly describe the adsorption kinetics of multilayers, even in the hypothesis of a concentration-dependent diffusion coefficient as in colloidal filtration, for instance. Still, it is clear that advection is a necessary condition for making multilayers through a mechanism that remains to be determined, which paves the way for future research.
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Affiliation(s)
- Coralie Pasquier
- INRAE, Institut Agro, STLO, F-35042 Rennes, France
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
| | | | - Antoine Bouchoux
- TBI, Université de Toulouse, CNRS, INRAE, INSA, 31077 Toulouse, France
| | | | | | | | - Gilles Paboeuf
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
- Université Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Rennes, France
| | | | - Benjamin Dollet
- Université Grenoble Alpes, CNRS, LIPhy, 38000 Grenoble, France
| | - Lay-Theng Lee
- Laboratoire Léon Brillouin CEA - Saclay, Université Paris-Saclay, 91191 Gif-sur-Yvette Cedex, France
| | - Sylvie Beaufils
- IPR Institute of Physics, UMR UR1 CNRS 6251, Rennes, 1 University, France
- Université Rennes 1, CNRS, ScanMAT - UMS 2001, F-35042 Rennes, France
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10
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Sharma B, Ma Y, Ferguson AL, Liu AP. In search of a novel chassis material for synthetic cells: emergence of synthetic peptide compartment. SOFT MATTER 2020; 16:10769-10780. [PMID: 33179713 DOI: 10.1039/d0sm01644f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Giant lipid vesicles have been used extensively as a synthetic cell model to recapitulate various life-like processes, including in vitro protein synthesis, DNA replication, and cytoskeleton organization. Cell-sized lipid vesicles are mechanically fragile in nature and prone to rupture due to osmotic stress, which limits their usability. Recently, peptide vesicles have been introduced as a synthetic cell model that would potentially overcome the aforementioned limitations. Peptide vesicles are robust, reasonably more stable than lipid vesicles and can withstand harsh conditions including pH, thermal, and osmotic variations. This mini-review summarizes the current state-of-the-art in the design, engineering, and realization of peptide-based chassis materials, including both experimental and computational work. We present an outlook for simulation-aided and data-driven design and experimental realization of engineered and multifunctional synthetic cells.
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Affiliation(s)
- Bineet Sharma
- Department of Mechanical Engineering, University of Michigan, Ann Arbor, Michigan 48109, USA.
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11
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Caballero Aguilar LM, Duchi S, Onofrillo C, O'Connell CD, Di Bella C, Moulton SE. Formation of alginate microspheres prepared by optimized microfluidics parameters for high encapsulation of bioactive molecules. J Colloid Interface Sci 2020; 587:240-251. [PMID: 33360897 DOI: 10.1016/j.jcis.2020.12.026] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 12/08/2020] [Accepted: 12/09/2020] [Indexed: 12/31/2022]
Abstract
Drug delivery systems such as microspheres have shown potential in releasing biologicals effectively for tissue engineering applications. Microfluidic systems are especially attractive for generating microspheres as they produce microspheres of controlled-size and in low volumes, using micro-emulsion processes. However, the flow rate dependency on the encapsulation of molecules at a microscale is poorly understood. In particular, the flow rate and pressure parameters might influence the droplet formation and drug encapsulation efficiency. We evaluated the parameters within a two-reagent flow focusing microfluidic chip under continuous formation of hydrogel particles using a flourinated oil and an ionic crosslinkable alginate hydrogel. Fluorescein isothiocyanate-dextran sulfate (FITC-dextran sulfate MW: 40 kDa) was used to evaluate the variation of the encapsulation efficiency with the flow parameters, optimizing droplets and microsphere formation. The ideal flow rates allowing for maximum encapsulation efficiency, were utilised to form bioactive microspheres by delivering transforming growth factor beta-3 (TGFβ-3) in cell culture media. Finally, we evaluated the potential of microfluidic-formed microspheres to be included within biological environments. The biocompatibility of the microspheres was tested over 28 days using adult human mesenchymal stem cells (hMSCs). The release profile of the growth factors from microspheres showed a sustained release in media, after an initial burst, up to 30 days. The metabolic activity of the cells cultured in the presence of the microspheres was similar to controls, supporting the biocompatibility of this approach. The fine-tuned parameters for alginate hydrogel to form microspheres have potential in encapsulating and preserving functional structure of bioactive agents for future tissue engineering applications.
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Affiliation(s)
- Lilith M Caballero Aguilar
- ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Victoria 3122, Australia; BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia
| | - Serena Duchi
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Clinical Sciences Building, 29 Regent Street, 3065 Fitzroy, VIC, Australia; ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, NSW, Australia
| | - Carmine Onofrillo
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Clinical Sciences Building, 29 Regent Street, 3065 Fitzroy, VIC, Australia; ARC Centre of Excellence for Electromaterials Science, Intelligent Polymer Research Institute, Innovation Campus, University of Wollongong, NSW, Australia
| | - Cathal D O'Connell
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia; School of Engineering, RMIT University, Melbourne, VIC 3001, Australia
| | - Claudia Di Bella
- BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia; Department of Surgery, St Vincent's Hospital, University of Melbourne, Clinical Sciences Building, 29 Regent Street, 3065 Fitzroy, VIC, Australia; Department of Medicine, St Vincent's Hospital Melbourne, 3065 Fitzroy, VIC, Australia
| | - Simon E Moulton
- ARC Centre of Excellence for Electromaterials Science, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Victoria 3122, Australia; BioFab3D, Aikenhead Centre for Medical Discovery, St Vincent's Hospital, Melbourne, Australia; Iverson Health Innovation Research Institute, Swinburne University of Technology, Hawthorn, Australia.
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12
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Cheung DL. The air-water interface stabilizes α-helical conformations of the insulin B-chain. J Chem Phys 2019. [DOI: 10.1063/1.5100253] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- David L. Cheung
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
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13
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Anti-biofouling activity of Ranaspumin-2 bio-surfactant immobilized on catechol-functional PMMA thin layers prepared by atmospheric plasma deposition. Colloids Surf B Biointerfaces 2019; 178:120-128. [DOI: 10.1016/j.colsurfb.2019.02.049] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 02/18/2019] [Accepted: 02/22/2019] [Indexed: 11/19/2022]
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14
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Cloning, expression, purification and characterization of a thermo- and surfactant-stable protease from Thermomonospora curvata. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2019. [DOI: 10.1016/j.bcab.2019.101111] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Li T, Lilja K, Morris RJ, Brandani GB. Langmuir–Blodgett technique for anisotropic colloids: Young investigator perspective. J Colloid Interface Sci 2019; 540:420-438. [DOI: 10.1016/j.jcis.2019.01.044] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Revised: 01/10/2019] [Accepted: 01/11/2019] [Indexed: 10/27/2022]
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16
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Valadbaigi P, Ettelaie R, Kulak AN, Murray BS. Generation of ultra-stable Pickering microbubbles via poly alkylcyanoacrylates. J Colloid Interface Sci 2019; 536:618-627. [DOI: 10.1016/j.jcis.2018.10.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 10/01/2018] [Accepted: 10/03/2018] [Indexed: 12/16/2022]
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17
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Mato A, Tarazona NA, Hidalgo A, Cruz A, Jiménez M, Pérez-Gil J, Prieto MA. Interfacial Activity of Phasin PhaF from Pseudomonas putida KT2440 at Hydrophobic-Hydrophilic Biointerfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:678-686. [PMID: 30580527 DOI: 10.1021/acs.langmuir.8b03036] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Phasins, the major proteins coating polyhydroxyalkanoate (PHA) granules, have been proposed as suitable biosurfactants for multiple applications because of their amphiphilic nature. In this work, we analyzed the interfacial activity of the amphiphilic α-helical phasin PhaF from Pseudomonas putida KT2440 at different hydrophobic-hydrophilic interfacial environments. The binding of PhaF to surfaces containing PHA or phospholipids, postulated as structural components of PHA granules, was confirmed in vitro using supported lipid bilayers and confocal microscopy, with polyhydroxyoctanoate- co-hexanoate P(HO- co-HHx) and Escherichia coli lipid extract as model systems. The surfactant-like capabilities of PhaF were determined by measuring changes in surface pressure in Langmuir devices. PhaF spontaneously adsorbed at the air-water interface, reducing the surface tension from 72 mN/m (water surface tension at 25 °C) to 50 mN/m. The differences in the adsorption of the protein in the presence of different phospholipid films showed a marked preference for phosphatidylglycerol species, such as 1-palmitoyl-2-oleoyl- sn-glycero-3-phosphoglycerol. The PHA-binding domain of PhaF (BioF) conserved a similar surface activity to PhaF, suggesting that it is responsible for the surfactant properties of the whole protein. These new findings not only increase our knowledge about the role of phasins in the PHA machinery but also open new outlooks for the application of these proteins as biosurfactants.
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Affiliation(s)
| | | | - Alberto Hidalgo
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | - Antonio Cruz
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
| | | | - Jesús Pérez-Gil
- Departamento de Bioquímica y Biología Molecular, Facultad de Ciencias Biológicas , Universidad Complutense de Madrid , 28040 Madrid , Spain
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18
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Singh BN, Singh BR, Gupta VK, Kharwar RN, Pecoraro L. Coating with Microbial Hydrophobins: A Novel Approach to Develop Smart Drug Nanoparticles. Trends Biotechnol 2018; 36:1103-1106. [DOI: 10.1016/j.tibtech.2018.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Revised: 03/20/2018] [Accepted: 03/21/2018] [Indexed: 12/11/2022]
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19
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Abstract
Surfaces and interfaces are ubiquitous in nature and are involved in many biological processes. Due to this, natural organisms have evolved a number of methods to control interfacial and surface properties. Many of these methods involve the use of specialised protein biosurfactants, which due to the competing demands of high surface activity, biocompatibility, and low solution aggregation may take structures that differ from the traditional head–tail structure of small molecule surfactants. As well as their biological functions, these proteins have also attracted interest for industrial applications, in areas including food technology, surface modification, and drug delivery. To understand the biological functions and technological applications of protein biosurfactants, it is necessary to have a molecular level description of their behaviour, in particular at surfaces and interfaces, for which molecular simulation is well suited to investigate. In this review, we will give an overview of simulation studies of a number of examples of protein biosurfactants (hydrophobins, surfactin, and ranaspumin). We will also outline some of the key challenges and future directions for molecular simulation in the investigation of protein biosurfactants and how this can help guide future developments.
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Vergara-Fernández A, Revah S, Moreno-Casas P, Scott F. Biofiltration of volatile organic compounds using fungi and its conceptual and mathematical modeling. Biotechnol Adv 2018; 36:1079-1093. [DOI: 10.1016/j.biotechadv.2018.03.008] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Revised: 03/09/2018] [Accepted: 03/14/2018] [Indexed: 01/03/2023]
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Cheung DL. Adsorption and conformations of lysozyme and α-lactalbumin at a water-octane interface. J Chem Phys 2018; 147:195101. [PMID: 29166117 DOI: 10.1063/1.4994561] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
As proteins contain both hydrophobic and hydrophilic amino acids, they will readily adsorb onto interfaces between water and hydrophobic fluids such as oil. This adsorption normally causes changes in the protein structure, which can result in loss of protein function and irreversible adsorption, leading to the formation of protein interfacial films. While this can be advantageous in some applications (e.g., food technology), in most cases it limits our ability to exploit protein functionality at interfaces. To understand and control protein interfacial adsorption and function, it is necessary to understand the microscopic conformation of proteins at liquid interfaces. In this paper, molecular dynamics simulations are used to investigate the adsorption and conformation of two similar proteins, lysozyme and α-lactalbumin, at a water-octane interface. While they both adsorb onto the interface, α-lactalbumin does so in a specific orientation, mediated by two amphipathic helices, while lysozyme adsorbs in a non-specific manner. Using replica exchange simulations, both proteins are found to possess a number of distinct interfacial conformations, with compact states similar to the solution conformation being most common for both proteins. Decomposing the different contributions to the protein energy at oil-water interfaces suggests that conformational change for α-lactalbumin, unlike lysozyme, is driven by favourable protein-oil interactions. Revealing these differences between the factors that govern the conformational change at interfaces in otherwise similar proteins can give insight into the control of protein interfacial adsorption, aggregation, and function.
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Affiliation(s)
- David L Cheung
- School of Chemistry, National University of Ireland Galway, Galway, Ireland
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22
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Abstract
Understanding the formation and structure of protective bacterial biofilms will help to design and identify antimicrobial strategies. Our experiments with the secreted major biofilm protein TasA characterize on a molecular level in vivo the transition of a folded protein into protease-resistant biofilm-stabilizing fibrils. Such conformational changes from a globular state into fibrillar structures are so far not seen for other biofilm-forming proteins. In this context, TasA can serve as a model system to study functional fibril formation from a globular state. Microorganisms form surface-attached communities, termed biofilms, which can serve as protection against host immune reactions or antibiotics. Bacillus subtilis biofilms contain TasA as major proteinaceous component in addition to exopolysaccharides. In stark contrast to the initially unfolded biofilm proteins of other bacteria, TasA is a soluble, stably folded monomer, whose structure we have determined by X-ray crystallography. Subsequently, we characterized in vitro different oligomeric forms of TasA by NMR, EM, X-ray diffraction, and analytical ultracentrifugation (AUC) experiments. However, by magic-angle spinning (MAS) NMR on live biofilms, a swift structural change toward only one of these forms, consisting of homogeneous and protease-resistant, β-sheet–rich fibrils, was observed in vivo. Thereby, we characterize a structural change from a globular state to a fibrillar form in a functional prokaryotic system on the molecular level.
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23
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Abstract
Biological foams contain a cocktail of unusual proteins with diverse properties. Natural foam proteins have surfactant properties equal to or better than conventional detergents. They reveal new physical principles based on conformational change at interfaces. They illustrate alternative surfactant mechanisms not available to conventional detergents. Can act synergistically to form and stabilize bio-compatible, hydrated foam structures.
Foams and surfactants are relatively rare in biology because of their potential to harm cell membranes and other delicate tissues. However, in recent work we have identified and characterized a number of natural surfactant proteins found in the foam nests of tropical frogs and other unusual sources. These proteins, and their associated foams, are relatively stable and bio-compatible, but with intriguing molecular structures that reveal a new class of surfactant activity. Here we review the structures and functional mechanisms of some of these proteins as revealed by experiments involving a range of biophysical and biochemical techniques, with additional mechanistic support coming from more recent site-directed mutagenesis studies.
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Affiliation(s)
- Alan Cooper
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Steven J Vance
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Brian O Smith
- Institute of Molecular, Cell & Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8QQ, UK
| | - Malcolm W Kennedy
- Institute of Molecular, Cell & Systems Biology, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8QQ, UK.,Institute of Biodiversity, Animal Health and Comparative Medicine, College of Medical, Veterinary and Life Sciences, University of Glasgow, G12 8QQ, UK
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24
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Abstract
Biofilms are communities of microbial cells that are encapsulated within a self-produced polymeric matrix. The matrix is critical to the success of biofilms in diverse habitats; however, many details of the composition, structure, and function remain enigmatic. Biofilms formed by the Gram-positive bacterium Bacillus subtilis depend on the production of the secreted film-forming protein BslA. Here, we show that a gradient of electron acceptor availability through the depth of the biofilm gives rise to two distinct functional roles for BslA and that these roles can be genetically separated through targeted amino acid substitutions. We establish that monomeric BslA is necessary and sufficient to give rise to complex biofilm architecture, whereas dimerization of BslA is required to render the community hydrophobic. Dimerization of BslA, mediated by disulfide bond formation, depends on two conserved cysteine residues located in the C-terminal region. Our findings demonstrate that bacteria have evolved multiple uses for limited elements in the matrix, allowing for alternative responses in a complex, changing environment.
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25
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Brandani GB, Vance SJ, Schor M, Cooper A, Kennedy MW, Smith BO, MacPhee CE, Cheung DL. Adsorption of the natural protein surfactant Rsn-2 onto liquid interfaces. Phys Chem Chem Phys 2017; 19:8584-8594. [PMID: 28289744 DOI: 10.1039/c6cp07261e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
To stabilize foams, droplets and films at liquid interfaces a range of protein biosurfactants have evolved in nature. Compared to synthetic surfactants, these combine surface activity with biocompatibility and low solution aggregation. One recently studied example is Rsn-2, a component of the foam nest of the frog Engystomops pustulosus, which has been predicted to undergo a clamshell-like opening transition at the air-water interface. Using atomistic molecular dynamics simulations and surface tension measurements we study the adsorption of Rsn-2 onto air-water and cyclohexane-water interfaces. The protein adsorbs readily at both interfaces, with adsorption mediated by the hydrophobic N-terminus. At the cyclohexane-water interface the clamshell opens, due to the favourable interaction between hydrophobic residues and cyclohexane molecules and the penetration of cyclohexane molecules into the protein core. Simulations of deletion mutants showed that removal of the N-terminus inhibits interfacial adsorption, which is consistent with the surface tension measurements. Deletion of the hydrophilic C-terminus also affects adsorption, suggesting that this plays a role in orienting the protein at the interface. The characterisation of the interfacial behaviour gives insight into the factors that control the interfacial adsorption of proteins, which may inform new applications of this and similar proteins in areas including drug delivery and food technology and may also be used in the design of synthetic molecules showing similar changes in conformation at interfaces.
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Affiliation(s)
- Giovanni B Brandani
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK.
| | - Steven J Vance
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Marieke Schor
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK.
| | - Alan Cooper
- School of Chemistry, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Malcolm W Kennedy
- School of Life Sciences, University of Glasgow, Glasgow, G12 8QQ, UK
| | - Brian O Smith
- Institute of Molecular, Cell, and Systems Biology, University of Glasgow, G12 8QQ, UK.
| | - Cait E MacPhee
- School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, UK.
| | - David L Cheung
- Department of Pure and Applied Chemistry, University of Strathclyde, Glasgow, G1 1XL, UK and School of Chemistry, National University of Ireland Galway, Galway, Ireland.
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26
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Sunde M, Pham CLL, Kwan AH. Molecular Characteristics and Biological Functions of Surface-Active and Surfactant Proteins. Annu Rev Biochem 2017; 86:585-608. [PMID: 28125290 DOI: 10.1146/annurev-biochem-061516-044847] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Many critical biological processes take place at hydrophobic:hydrophilic interfaces, and a wide range of organisms produce surface-active proteins and peptides that reduce surface and interfacial tension and mediate growth and development at these boundaries. Microorganisms produce both small lipid-associated peptides and amphipathic proteins that allow growth across water:air boundaries, attachment to surfaces, predation, and improved bioavailability of hydrophobic substrates. Higher-order organisms produce surface-active proteins with a wide variety of functions, including the provision of protective foam environments for vulnerable reproductive stages, evaporative cooling, and gas exchange across airway membranes. In general, the biological functions supported by these diverse polypeptides require them to have an amphipathic nature, and this is achieved by a diverse range of molecular structures, with some proteins undergoing significant conformational change or intermolecular association to generate the structures that are surface active.
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Affiliation(s)
- Margaret Sunde
- Discipline of Pharmacology, School of Medical Sciences and Australian Institute for Nanoscale Science and Technology, University of Sydney, NSW 2006, Australia; ,
| | - Chi L L Pham
- Discipline of Pharmacology, School of Medical Sciences and Australian Institute for Nanoscale Science and Technology, University of Sydney, NSW 2006, Australia; ,
| | - Ann H Kwan
- School of Life and Environmental Sciences and Australian Institute for Nanoscale Science and Technology, University of Sydney, NSW 2006, Australia;
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Arnaouteli S, MacPhee CE, Stanley-Wall NR. Just in case it rains: building a hydrophobic biofilm the Bacillus subtilis way. Curr Opin Microbiol 2016; 34:7-12. [PMID: 27458867 DOI: 10.1016/j.mib.2016.07.012] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 07/11/2016] [Accepted: 07/11/2016] [Indexed: 01/16/2023]
Abstract
Over the millennia, diverse species of bacteria have evolved multiple independent mechanisms to structure sessile biofilm communities that confer protection and stability to the inhabitants. The Gram-positive soil bacterium Bacillus subtilis biofilm presents as an architecturally complex, highly hydrophobic community that resists wetting by water, solvents, and biocides. This remarkable property is conferred by a small secreted protein called BslA, which self-assembles into an organized lattice at an interface. In the biofilm, production of BslA is tightly regulated and the resultant protein is secreted into the extracellular environment where it forms a very effective communal barrier allowing the resident B. subtilis cells to shelter under the protection of a protein raincoat.
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Affiliation(s)
- Sofia Arnaouteli
- School of Life Sciences, University of Dundee, Dundee, United Kingdom
| | - Cait E MacPhee
- School of Physics and Astronomy, University of Edinburgh, Edinburgh, United Kingdom.
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