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Siddiquee R, Lo V, Johnston CL, Buffier AW, Ball SR, Ciofani JL, Zeng YC, Mahjoub M, Chrzanowski W, Rezvani-Baboli S, Brown L, Pham CLL, Sunde M, Kwan AH. Surface-Induced Hydrophobin Assemblies with Versatile Properties and Distinct Underlying Structures. Biomacromolecules 2023; 24:4783-4797. [PMID: 37747808 DOI: 10.1021/acs.biomac.3c00542] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/27/2023]
Abstract
Hydrophobins are remarkable proteins due to their ability to self-assemble into amphipathic coatings that reverse surface wettability. Here, the versatility of the Class I hydrophobins EASΔ15 and DewY in diverse nanosuspension and coating applications is demonstrated. The hydrophobins are shown to coat or emulsify a range of substrates including oil, hydrophobic drugs, and nanodiamonds and alter their solution and surface behavior. Surprisingly, while the coatings confer new properties, only a subset is found to be resistant to hot detergent treatment, a feature previously thought to be characteristic of the functional amyloid form of Class I hydrophobins. These results demonstrate that substrate surface properties can influence the molecular structures and physiochemical properties of hydrophobin and possibly other functional amyloids. Functional amyloid assembly with different substrates and conditions may be analogous to the propagation of different polymorphs of disease-associated amyloid fibrils with distinct structures, stability, and clinical phenotypes. Given that amyloid formation is not required for Class I hydrophobins to serve diverse applications, our findings open up new opportunities for their use in applications requiring a range of chemical and physical properties. In hydrophobin nanotechnological applications where high stability of assemblies is required, simultaneous structural and functional characterization should be carried out. Finally, while results in this study pertain to synthetic substrates, they raise the possibility that at least some members of the pseudo-Class I and Class III hydrophobins, reported to form assemblies with noncanonical properties, may be Class I hydrophobins adopting alternative structures in response to environmental cues.
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Affiliation(s)
- Rezwan Siddiquee
- School of Life and Environmental Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
| | - Victor Lo
- School of Medical Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
| | - Caitlin L Johnston
- School of Medical Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
| | - Aston W Buffier
- School of Life and Environmental Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
| | - Sarah R Ball
- Formerly at School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Jonathan L Ciofani
- School of Medicine, The University of Sydney, Sydney, NSW 2006, Australia
| | - Yi Cheng Zeng
- Formerly at School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Mahiar Mahjoub
- School of Medicine, The University of Sydney, Sydney, NSW 2006, Australia
| | | | | | - Louise Brown
- School of Natural Sciences, Macquarie University, Sydney, NSW 2109, Australia
| | - Chi L L Pham
- Formerly at School of Medical Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Margaret Sunde
- School of Medical Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
| | - Ann H Kwan
- School of Life and Environmental Sciences and Sydney Nano, The University of Sydney, Sydney, NSW 2006, Australia
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2
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Yang J, Ge L, Song B, Ma Z, Yang X, Wang B, Dai Y, Xu H, Qiao M. A novel hydrophobin encoded by hgfII from Grifola frondosa exhibiting excellent self-assembly ability. Front Microbiol 2022; 13:990231. [PMID: 36160239 PMCID: PMC9504065 DOI: 10.3389/fmicb.2022.990231] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 08/22/2022] [Indexed: 11/25/2022] Open
Abstract
Hydrophobins are small proteins from filamentous fungi, which have remarkable self-assembly properties of great potential, e.g., as drug carriers and as anti-bacterial agents, but different hydrophobins, with improved properties, are needed. HGFI (a hydrophobin from Grifola frondosa) is a class I hydrophobin, which can self-assemble into rodlet structures with a length range 100–150 nm. In this study, we identified a new hydrophobin gene (hgfII) from the mycelium of G. frondosa with a much higher transcriptional level than hgfI. Heterologous expression of hgfII was accomplished in the Pichia pastoris. X-ray photoelectron spectroscopy and water contact angle assay measurements revealed that HGFII can self-assemble into a protein film at the air–solid interface, with circular dichroism and thioflavin T fluorescence studies showing that this effect was accompanied by a decrease in α-helix content and an increase in β-sheet content. Using atomic force microscopy, it was shown that HGFII self-assembled into rodlet-like structures with a diameter of 15–30 nm, showing that it was a class I hydrophobin, with self-assembly behavior different from HGFI. The surface hydrophobicity of HGFII was stronger than that of HGFI, meanwhile, in emulsification trials, HGFII displayed better dispersive capacity to the soybean oil than HGFI, producing a more stable and durable emulsion.
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Affiliation(s)
- Jiuxia Yang
- NHC Key Laboratory of Critical Care Medicine, Tianjin First Central Hospital, Tianjin, China
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Lu Ge
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Bo Song
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Zhongqiang Ma
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Xiaotian Yang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Bo Wang
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Yixin Dai
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
| | - Haijin Xu
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- *Correspondence: Haijin Xu,
| | - Mingqiang Qiao
- The Key Laboratory of Molecular Microbiology and Technology, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- The Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, China
- Mingqiang Qiao,
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3
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Niu B, Li M, Jia J, Zhang C, Fan YY, Li W. Hydrophobin-enhanced stability, dispersions and release of curcumin nanoparticles in water. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2020; 31:1793-1805. [PMID: 32510282 DOI: 10.1080/09205063.2020.1775761] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Most chemotherapeutic drugs commonly suffer from low aqueous solubility that can potentially limit drugs absorption. Drug nanomerization is an advanced approach to overcoming their poor water-solubility. In this study, class I hydrophobin recombinant HGFI (rHGFI)-based curcumin (Cur) nanoparticles (rHGFI-Cur) were prepared by freeze-drying method. The rHGFI-Cur nanocomposites were characterized by contact angle, transmission electron microscopy, fluorescence microscopy and dynamic light scattering. The results showed that rHGFI could lead to the wettability conversion and stability improved of Cur in water. X-ray photoelectron spectroscopy and Fourier transform infrared suggested that rHGFI could non-covalently bind to Cur to render them hydrophilic through hydrophobic forces. Additionally, drug release and cytotoxicity assays illustrated that rHGFI-Cur nanoparticles could facilitate Cur release and exhibited higher cytotoxicity than free Cur for human esophageal cancer cells TE-1. Thus, it suggested that rHGFI has a great potential application for hydrophobic drug delivery without toxicity.[Formula: see text].
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Affiliation(s)
- Baolong Niu
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, P. R. China.,College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
| | - Meilin Li
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
| | - Jianhong Jia
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
| | - Ce Zhang
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, P. R. China
| | - Yan-Ying Fan
- School of Basic Medical Sciences, Shanxi Medical University, Taiyuan, P. R. China
| | - Wenfeng Li
- College of Materials Science and Engineering, Taiyuan University of Technology, Taiyuan, P. R. China
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4
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Mirzaei F, Mirzaei M, Torkzadeh-Mahani M. A hydrophobin-based-biosensor layered by an immobilized lactate dehydrogenase enzyme for electrochemical determination of pyruvate. Bioelectrochemistry 2019; 130:107323. [DOI: 10.1016/j.bioelechem.2019.06.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 06/24/2019] [Accepted: 06/24/2019] [Indexed: 02/07/2023]
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5
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Biomacromolecules and Bio-Sourced Products for the Design of Flame Retarded Fabrics: Current State of the Art and Future Perspectives. Molecules 2019; 24:molecules24203774. [PMID: 31635143 PMCID: PMC6833018 DOI: 10.3390/molecules24203774] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 10/12/2019] [Accepted: 10/19/2019] [Indexed: 11/26/2022] Open
Abstract
The search for possible alternatives to traditional flame retardants (FRs) is pushing the academic and industrial communities towards the design of new products that exhibit low environmental impact and toxicity, notwithstanding high performances, when put in contact with a flame or exposed to an irradiative heat flux. In this context, in the last five to ten years, the suitability and effectiveness of some biomacromolecules and bio-sourced products with a specific chemical structure and composition as effective flame retardants for natural or synthetic textiles has been thoroughly explored at the lab-scale level. In particular, different proteins (such as whey proteins, caseins, and hydrophobins), nucleic acids and extracts from natural sources, even wastes and crops, have been selected and exploited for designing flame retardant finishing treatments for several fibers and fabrics. It was found that these biomacromolecules and bio-sourced products, which usually bear key elements (i.e., nitrogen, phosphorus, and sulphur) can be easily applied to textiles using standard impregnation/exhaustion methods or even the layer-by-layer technique; moreover, these “green” products are mostly responsible for the formation of a stable protective char (i.e., a carbonaceous residue), as a result of the exposure of the textile substrate to a heat flux or a flame. This review is aimed at summarizing the development and the recent progress concerning the utilization of biomacromolecules/bio-sourced products as effective flame retardants for different textile materials. Furthermore, the existing drawbacks and limitations of the proposed finishing approaches as well as some possible further advances will be considered.
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6
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Yang J, Wang B, Ge L, Yang X, Wang X, Dai Y, Niu B, Xu H, Qiao M. The enhancement of surface activity and nanoparticle stability through the alteration of charged amino acids of HGFI. Colloids Surf B Biointerfaces 2019; 175:703-712. [DOI: 10.1016/j.colsurfb.2018.12.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/15/2018] [Accepted: 12/17/2018] [Indexed: 11/24/2022]
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7
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Analysis of a putative glycosylation site in the Trichoderma virens elicitor SM1 reveals no role in protein dimerization. Biochem Biophys Res Commun 2019; 509:817-821. [DOI: 10.1016/j.bbrc.2019.01.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2018] [Accepted: 01/03/2019] [Indexed: 11/18/2022]
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8
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In situ removal of consensus dengue virus envelope protein domain III fused to hydrophobin in Pichia pastoris cultures. Protein Expr Purif 2018; 153:131-137. [PMID: 30240632 DOI: 10.1016/j.pep.2018.09.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Revised: 08/14/2018] [Accepted: 09/17/2018] [Indexed: 12/24/2022]
Abstract
This work describes a novel strategy for the integrated expression and purification of recombinant proteins in Pichia pastoris cultures. Hydrophobins can be used as fusion tags, proteins fused to them alter their hydrophobicity and can be purified by aqueous two-phase systems (ATPS) based on non-ionic surfactants. Here, the consensus dengue virus envelope protein domain III fused to hydrophobin I of Trichoderma reesei was expressed in Pichia pastoris cultures and an in situ product removal by an ATPS using a non-ionic detergent, (Triton X-114) was performed. The protein was produced and purified directly from the yeast culture supernatant both efficiently and with no loss. The purified protein was properly immobilized by adsorption in solid phase and recognized by anti-dengue antibodies, showing its potential for the development of an indirect immunoassay for dengue virus.
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9
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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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10
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Li B, Wang X, Li Y, Paananen A, Szilvay GR, Qin M, Wang W, Cao Y. Single-Molecule Force Spectroscopy Reveals Self-Assembly Enhanced Surface Binding of Hydrophobins. Chemistry 2018; 24:9224-9228. [PMID: 29687928 DOI: 10.1002/chem.201801730] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2018] [Indexed: 01/26/2023]
Abstract
Hydrophobins have raised lots of interest as powerful surface adhesives. However, it remains largely unexplored how their strong and versatile surface adhesion is linked to their unique amphiphilic structural features. Here, we develop an AFM-based single-molecule force spectroscopy assay to quantitatively measure the binding strength of hydrophobin to various types of surfaces both in isolation and in preformed protein films. We find that individual class II hydrophobins (HFBI) bind strongly to hydrophobic surfaces but weakly to hydrophilic ones. After self-assembly into protein films, they show much stronger binding strength to both surfaces due to the cooperativity of different interactions at nanoscale. Such self-assembly enhanced surface binding may serve as a general design principle for synthetic bioactive adhesives.
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Affiliation(s)
- Bing Li
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, P. R. China
| | - Xin Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, P. R. China
| | - Ying Li
- Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control, School of Environmental Science and Engineering, Nanjing University of Information Science & Technology, Nanjing, Jiangsu, 210044, P. R. China
| | - Arja Paananen
- Industrial Biotechnology, VTT Technical Research Centre of Finland Ltd, 02044 VTT, Espoo, Finland
| | - Géza R Szilvay
- Industrial Biotechnology, VTT Technical Research Centre of Finland Ltd, 02044 VTT, Espoo, Finland
| | - Meng Qin
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, P. R. China
| | - Wei Wang
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, P. R. China
| | - Yi Cao
- Collaborative Innovation Center of Advanced Microstructures, National Laboratory of Solid State Microstructure, Department of Physics, Nanjing University, Nanjing, 210093, P. R. China
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11
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Zhang X, Kirby SM, Chen Y, Anna SL, Walker LM, Hung FR, Russo PS. Formation and elasticity of membranes of the class II hydrophobin Cerato-ulmin at oil-water interfaces. Colloids Surf B Biointerfaces 2018; 164:98-106. [DOI: 10.1016/j.colsurfb.2018.01.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 12/29/2017] [Accepted: 01/15/2018] [Indexed: 01/10/2023]
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12
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Deckers SM, Lorgouilloux Y, Gebruers K, Baggerman G, Verachtert H, Neven H, Michiels C, Derdelinckx G, Delcour JA, Martens J. Dynamic Light Scattering (DLS) as a Tool to Detect CO2-Hydrophobin Structures and Study the Primary Gushing Potential of Beer. JOURNAL OF THE AMERICAN SOCIETY OF BREWING CHEMISTS 2018. [DOI: 10.1094/asbcj-2011-0524-01] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Affiliation(s)
- Sylvie M. Deckers
- KU Leuven, Department of Microbial and Molecular Systems (M2S), and Leuven Food Science and Nutrition Research Centre (LFoRCe-MaltBeerSci), Heverlee, Belgium
| | | | - Kurt Gebruers
- KULeuven, M2S, and LFoRCe-MaltBeerSci, Heverlee, Belgium
| | - Geert Baggerman
- KULeuven, ProMeta, Interfaculty Centre for Proteomics and Metabolomics, Leuven, Belgium
| | | | - Hedwig Neven
- KULeuven, M2S, and LFoRCe-MaltBeerSci, Heverlee, Belgium
- Brewery Duvel-Moortgat, Puurs, Belgium
| | - Chris Michiels
- KULeuven, M2S, and LFoRCe-MaltBeerSci, Heverlee, Belgium
| | | | - Jan A. Delcour
- KULeuven, M2S, and LFoRCe-MaltBeerSci, Heverlee, Belgium
| | - Johan Martens
- KULeuven, M2S, Centre for Surface Chemistry and Catalysis, Heverlee, Belgium
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Kurppa K, Reuter LJ, Ritala A, Linder MB, Joensuu JJ. In-solution antibody harvesting with a plant-produced hydrophobin-Protein A fusion. PLANT BIOTECHNOLOGY JOURNAL 2018; 16:404-414. [PMID: 28640955 PMCID: PMC5787837 DOI: 10.1111/pbi.12780] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 06/01/2016] [Accepted: 06/16/2017] [Indexed: 05/02/2023]
Abstract
Purification is a bottleneck and a major cost factor in the production of antibodies. We set out to engineer a bifunctional fusion protein from two building blocks, Protein A and a hydrophobin, aiming at low-cost and scalable antibody capturing in solutions. Immunoglobulin-binding Protein A is widely used in affinity-based purification. The hydrophobin fusion tag, on the other hand, has been shown to enable purification by two-phase separation. Protein A was fused to two different hydrophobin tags, HFBI or II, and expressed transiently in Nicotiana benthamiana. The hydrophobins enhanced accumulation up to 35-fold, yielding up to 25% of total soluble protein. Both fused and nonfused Protein A accumulated in protein bodies. Hence, the increased yield could not be attributed to HFB-induced protein body formation. We also demonstrated production of HFBI-Protein A fusion protein in tobacco BY-2 suspension cells in 30 l scale, with a yield of 35 mg/l. Efficient partitioning to the surfactant phase confirmed that the fusion proteins retained the amphipathic properties of the hydrophobin block. The reversible antibody-binding capacity of the Protein A block was similar to the nonfused Protein A. The best-performing fusion protein was tested in capturing antibodies from hybridoma culture supernatant with two-phase separation. The fusion protein was able to carry target antibodies to the surfactant phase and subsequently release them back to the aqueous phase after a change in pH. This report demonstrates the potential of hydrophobin fusion proteins for novel applications, such as harvesting antibodies in solutions.
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Affiliation(s)
- Katri Kurppa
- VTT Technical Research Centre of Finland Ltd.EspooFinland
| | | | - Anneli Ritala
- VTT Technical Research Centre of Finland Ltd.EspooFinland
| | - Markus B. Linder
- VTT Technical Research Centre of Finland Ltd.EspooFinland
- Aalto UniversityDepartment of Biotechnology and Chemical TechnologyEspooFinland
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14
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Przylucka A, Akcapinar GB, Bonazza K, Mello-de-Sousa TM, Mach-Aigner AR, Lobanov V, Grothe H, Kubicek CP, Reimhult E, Druzhinina IS. COMPARATIVE PHYSIOCHEMICAL ANALYSIS OF HYDROPHOBINS PRODUCED IN ESCHERICHIA COLI AND PICHIA PASTORIS. Colloids Surf B Biointerfaces 2017; 159:913-923. [DOI: 10.1016/j.colsurfb.2017.08.058] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/16/2017] [Accepted: 08/28/2017] [Indexed: 01/24/2023]
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15
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Smith ME, Targovnik AM, Cerezo J, Morales MA, Miranda MV, Talou JR. Integrated process for the purification and immobilization of the envelope protein domain III of dengue virus type 2 expressed in Rachiplusia nu larvae and its potential application in a diagnostic assay. Protein Expr Purif 2016; 131:76-84. [PMID: 27888023 DOI: 10.1016/j.pep.2016.11.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/18/2016] [Accepted: 11/19/2016] [Indexed: 12/24/2022]
Abstract
Dengue incidence has grown dramatically in the last years, with about 40% of the world population at risk of infection. Recently, a vaccine developed by Sanofi Pasteur has been registered, but only in a few countries. Moreover, specific antiviral drugs are not available. Thus, an efficient and accurate diagnosis is important for disease management. To develop a low-cost immunoassay for dengue diagnosis, in the present study we expressed the envelope protein domain III of dengue virus type 2 in Rachiplusia nu larvae by infection with a recombinant baculovirus. The antigen was expressed as a fusion to hydrophobin I (DomIIIHFBI) to easily purify it by an aqueous two-phase system (ATPS) and to efficiently immobilize it in immunoassay plates. A high level of recombinant DomIIIHFBI was obtained in R. nu, where yields reached 4.5 mg per g of larva. Also, we were able to purify DomIIIHFBI by an ATPS with 2% of Triton X-114, reaching a yield of 73% and purity higher than 80% in a single purification step. The recombinant DomIIIHFBI was efficiently immobilized in hydrophobic surface plates. The immunoassay we developed with the immobilized antigen was able to detect IgG specific for dengue virus type 2 in serum samples and not for other serotypes.
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Affiliation(s)
- María Emilia Smith
- Instituto NANOBIOTEC - Cátedra de Biotecnología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Junín 956, 1113, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Alexandra Marisa Targovnik
- Instituto NANOBIOTEC - Cátedra de Biotecnología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Junín 956, 1113, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Julieta Cerezo
- Instituto NANOBIOTEC - Cátedra de Biotecnología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Junín 956, 1113, Ciudad Autónoma de Buenos Aires, Argentina.
| | - María Alejandra Morales
- Laboratorio de Arbovirus, Instituto Nacional de Enfermedades Virales Humanas (INEVH) "Dr. Julio I. Maiztegui"- ANLIS, Monteagudo 2510, 2700, Pergamino, Buenos Aires, Argentina.
| | - María Victoria Miranda
- Instituto NANOBIOTEC - Cátedra de Biotecnología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Junín 956, 1113, Ciudad Autónoma de Buenos Aires, Argentina.
| | - Julián Rodríguez Talou
- Instituto NANOBIOTEC - Cátedra de Biotecnología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires - Consejo Nacional de Investigaciones Científicas y Técnicas, Junín 956, 1113, Ciudad Autónoma de Buenos Aires, Argentina.
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16
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Reuter L, Ritala A, Linder M, Joensuu J. Novel Hydrophobin Fusion Tags for Plant-Produced Fusion Proteins. PLoS One 2016; 11:e0164032. [PMID: 27706254 PMCID: PMC5051927 DOI: 10.1371/journal.pone.0164032] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2016] [Accepted: 09/19/2016] [Indexed: 11/19/2022] Open
Abstract
Hydrophobin fusion technology has been applied in the expression of several recombinant proteins in plants. Until now, the technology has relied exclusively on the Trichoderma reesei hydrophobin HFBI. We screened eight novel hydrophobin tags, T. reesei HFBII, HFBIII, HFBIV, HFBV, HFBVI and Fusarium verticillioides derived HYD3, HYD4 and HYD5, for production of fusion proteins in plants and purification by two-phase separation. To study the properties of the hydrophobins, we used N-terminal and C-terminal GFP as a fusion partner. Transient expression of the hydrophobin fusions in Nicotiana benthamiana revealed large variability in accumulation levels, which was also reflected in formation of protein bodies. In two-phase separations, only HFBII and HFBIV were able to concentrate GFP into the surfactant phase from a plant extract. The separation efficiency of both tags was comparable to HFBI. When the accumulation was tested side by side, HFBII-GFP gave a better yield than HFBI-GFP, while the yield of HFBIV-GFP remained lower. Thus we present here two alternatives for HFBI as functional fusion tags for plant-based protein production and first step purification.
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Affiliation(s)
- Lauri Reuter
- VTT Technical Research Centre of Finland Ltd., Espoo, Finland
| | - Anneli Ritala
- VTT Technical Research Centre of Finland Ltd., Espoo, Finland
| | - Markus Linder
- VTT Technical Research Centre of Finland Ltd., Espoo, Finland
- Aalto University, Department of Biotechnology and Chemical Technology, Espoo, Finland
| | - Jussi Joensuu
- VTT Technical Research Centre of Finland Ltd., Espoo, Finland
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Morris RJ, Bromley KM, Stanley-Wall N, MacPhee CE. A phenomenological description of BslA assemblies across multiple length scales. PHILOSOPHICAL TRANSACTIONS. SERIES A, MATHEMATICAL, PHYSICAL, AND ENGINEERING SCIENCES 2016; 374:rsta.2015.0131. [PMID: 27298433 PMCID: PMC4920280 DOI: 10.1098/rsta.2015.0131] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/14/2016] [Indexed: 05/30/2023]
Abstract
Intrinsically interfacially active proteins have garnered considerable interest recently owing to their potential use in a range of materials applications. Notably, the fungal hydrophobins are known to form robust and well-organized surface layers with high mechanical strength. Recently, it was shown that the bacterial biofilm protein BslA also forms highly elastic surface layers at interfaces. Here we describe several self-assembled structures formed by BslA, both at interfaces and in bulk solution, over a range of length scales spanning from nanometres to millimetres. First, we observe transiently stable and highly elongated air bubbles formed in agitated BslA samples. We study their behaviour in a range of solution conditions and hypothesize that their dissipation is a consequence of the slow adsorption kinetics of BslA to an air-water interface. Second, we describe elongated tubules formed by BslA interfacial films when shear stresses are applied in both a Langmuir trough and a rheometer. These structures bear a striking resemblance, although much larger in scale, to the elongated air bubbles formed during agitation. Taken together, this knowledge will better inform the conditions and applications of how BslA can be used in the stabilization of multi-phase materials.This article is part of the themed issue 'Soft interfacial materials: from fundamentals to formulation'.
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Affiliation(s)
- Ryan J Morris
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK
| | - Keith M Bromley
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK
| | - Nicola Stanley-Wall
- Division of Molecular Microbiology, School of Life Sciences, University of Dundee, Dundee DD1 5EH, UK
| | - Cait E MacPhee
- School of Physics and Astronomy, University of Edinburgh, James Clerk Maxwell Building, Peter Guthrie Tait Road, Edinburgh EH9 3FD, UK
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Piscitelli A, Pennacchio A, Longobardi S, Velotta R, Giardina P. Vmh2 hydrophobin as a tool for the development of “self-immobilizing” enzymes for biosensing. Biotechnol Bioeng 2016; 114:46-52. [DOI: 10.1002/bit.26049] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2016] [Revised: 07/05/2016] [Accepted: 07/11/2016] [Indexed: 12/18/2022]
Affiliation(s)
- Alessandra Piscitelli
- Department of Chemical Sciences; Università degli Studi di Napoli Federico II; Complesso Universitario Monte S. Angelo; via Cinthia Naples 4 80126 Italy
| | - Anna Pennacchio
- Department of Chemical Sciences; Università degli Studi di Napoli Federico II; Complesso Universitario Monte S. Angelo; via Cinthia Naples 4 80126 Italy
| | - Sara Longobardi
- Department of Chemical Sciences; Università degli Studi di Napoli Federico II; Complesso Universitario Monte S. Angelo; via Cinthia Naples 4 80126 Italy
| | - Raffaele Velotta
- Department of Physics; Università degli Studi di Napoli Federico II; Complesso Universitario Monte S. Angelo; Naples Italy
| | - Paola Giardina
- Department of Chemical Sciences; Università degli Studi di Napoli Federico II; Complesso Universitario Monte S. Angelo; via Cinthia Naples 4 80126 Italy
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Schulz S, Schumacher D, Raszkowski D, Girhard M, Urlacher VB. Fusion to Hydrophobin HFBI Improves the Catalytic Performance of a Cytochrome P450 System. Front Bioeng Biotechnol 2016; 4:57. [PMID: 27458582 PMCID: PMC4930934 DOI: 10.3389/fbioe.2016.00057] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2016] [Accepted: 06/22/2016] [Indexed: 01/06/2023] Open
Abstract
Cytochrome P450 monooxygenases (P450) are heme-containing enzymes that oxidize a broad range of substrates in the presence of molecular oxygen and NAD(P)H. For their activity, most P450s rely on one or two redox proteins responsible for the transfer of electrons from the cofactor NAD(P)H to the heme. One of the challenges when using P450s in vitro, especially when non-physiological redox proteins are applied, is the inefficient transfer of electrons between the individual proteins resulting in non-productive consumption of NAD(P)H - referred to as uncoupling. Herein, we describe the improvement of the coupling efficiency between a P450 and its redox partner - diflavin reductase - by fusing both enzymes individually to the hydrophobin HFBI - a small self-assembling protein of the fungus Trichoderma reesei. The separated monooxygenase (BMO) and reductase (BMR) domains of P450 BM3 from Bacillus megaterium were chosen as a P450-reductase model system and individually fused to HFBI. The fusion proteins could be expressed in soluble form in Escherichia coli. When HFBI-fused BMO and BMR were mixed in vitro, substantially higher coupling efficiencies were measured as compared with the respective non-fused enzymes. Consequently, myristic acid conversion increased up to 20-fold (after 6 h) and 5-fold (after 24 h). Size exclusion chromatography demonstrated that in vitro the hydrophobin-fused enzymes build multimeric protein assemblies. Thus, the higher activity is hypothesized to be due to HFBI-mediated self-assembly arranging BMO and BMR in close spatial proximity in aqueous solution.
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Affiliation(s)
- Sebastian Schulz
- Institute of Biochemistry, Heinrich Heine University Düsseldorf , Düsseldorf , Germany
| | - Dominik Schumacher
- Institute of Biochemistry, Heinrich Heine University Düsseldorf , Düsseldorf , Germany
| | - Daniel Raszkowski
- Institute of Biochemistry, Heinrich Heine University Düsseldorf , Düsseldorf , Germany
| | - Marco Girhard
- Institute of Biochemistry, Heinrich Heine University Düsseldorf , Düsseldorf , Germany
| | - Vlada B Urlacher
- Institute of Biochemistry, Heinrich Heine University Düsseldorf , Düsseldorf , Germany
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Lohrasbi-Nejad A, Torkzadeh-Mahani M, Hosseinkhani S. Hydrophobin-1 promotes thermostability of firefly luciferase. FEBS J 2016; 283:2494-507. [PMID: 27191938 DOI: 10.1111/febs.13757] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 04/25/2016] [Accepted: 05/13/2016] [Indexed: 11/28/2022]
Abstract
The thermal sensitivity of firefly luciferase limits its use in certain applications. Firefly luciferase has hydrophobic sites on its surface, which lead to aggregation and inactivation of the enzyme at temperatures over 30 °C. We have successfully stabilized firefly luciferase at high temperatures with the assistance of a unique protein, hydrophobin-1 (HFB1). HFB1 is a small secretory protein belonging to class II of hydrophobins with a low molecular weight (7.5 kDa) and distinct functional hydrophobic patch on its surface. The interaction of HFB1 with hydrophobic sites on the surface of luciferase was confirmed by extrinsic fluorescence studies using 8-anilino-1-naphthalenesulfonic acid (ANS) as a hydrophobic reporter probe. Calculation of thermodynamic parameters of heat inactivation of luciferase shows that conformational changes and flexibility of enzyme decreased in the presence of HFB1, and thermostability of the HFB1-treated enzyme increased. Furthermore, the addition of HFB1 into the enzymatic solution leads to an increase in catalytic efficiency of luciferase and subsequently improves the utility of the enzyme as an ATP detector.
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Affiliation(s)
- Azadeh Lohrasbi-Nejad
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Masoud Torkzadeh-Mahani
- Department of Biotechnology, Research institute for Science and High Technology and Environmental Sciences, Graduated University of Advanced Technology, Kerman, Iran
| | - Saman Hosseinkhani
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
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Kirby SM, Zhang X, Russo PS, Anna SL, Walker LM. Formation of a Rigid Hydrophobin Film and Disruption by an Anionic Surfactant at an Air/Water Interface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:5542-51. [PMID: 27164189 DOI: 10.1021/acs.langmuir.6b00809] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Hydrophobins are amphiphilic proteins produced by fungi. Cerato-ulmin (CU) is a hydrophobin that has been associated with Dutch elm disease. Like other hydrophobins, CU stabilizes air bubbles and oil droplets through the formation of a persistent protein film at the interface. The behavior of hydrophobins at surfaces has raised interest in their potential applications, including use in surface coatings, food foams, and emulsions and as dispersants. The practical use of hydrophobins requires an improved understanding of the interfacial behavior of these proteins, alone and in the presence of added surfactants. In this study, the adsorption behavior of CU at air/water interfaces is characterized by measuring the surface tension and interfacial rheology as a function of adsorption time. CU is found to adsorb irreversibly at air/water interfaces. The magnitude of the dilatational modulus increases with adsorption time and surface pressure until CU eventually forms a rigid film. The persistence of this film is tested through the sequential addition of strong surfactant sodium dodecyl sulfate (SDS) to the bulk liquid adjacent to the interface. SDS is found to coadsorb to interfaces precoated with a CU film. At high concentrations, the addition of SDS significantly decreases the dilatational modulus, indicating disruption and displacement of CU by SDS. Sequential adsorption results in mixed layers with properties not observed in interfaces generated from complexes formed in the bulk. These results lend insight to the complex interfacial interactions between hydrophobins and surfactants.
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Affiliation(s)
| | - Xujun Zhang
- School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
| | - Paul S Russo
- School of Materials Science and Engineering and School of Chemistry and Biochemistry, Georgia Institute of Technology , Atlanta, Georgia 30332, United States
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Abstract
Fungal hydrophobin is a family of low molecular weight proteins consisting of four disulfide bridges and an extraordinary hydrophobic patch. The hydrophobic patch of hydrophobins and the molecules of gaseous CO2 may interact together and form the stable CO2-nanobubbles covered by an elastic membrane in carbonated beverages. The nanobubbles provide the required energy to provoke primary gushing. Due to the hydrophobicity of hydrophobin, this protein is used as a biosurfactant, foaming agent or encapsulating agent in food products and medicine formulations. Increasing demands for using of hydrophobins led to a challenge regarding production and purification of this product. However, the main issue to use hydrophobin in the industry is the regulatory affairs: yet there is no approved legislation for using hydrophobin in food and beverages. To comply with the legislation, establishing a consistent method for obtaining pure hydrophobins is necessary. Currently, few research teams in Europe are focusing on different aspects of hydrophobins. In this paper, an up-to-date collection of highlights from those special groups about the bio-chemical and physicochemical characteristics of hydrophobins have been studied. The recent advances of those groups concerning the production and purification, positive applications and negative function of hydrophobin are also summarised.
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Yamasaki R, Haruyama T. Formation Mechanism of Flattened Top HFBI Domical Droplets. J Phys Chem B 2016; 120:3699-704. [DOI: 10.1021/acs.jpcb.6b01306] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ryota Yamasaki
- Advanced
Catalytic Transformation Program for Carbon Utilization (ACT-C), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan
| | - Tetsuya Haruyama
- Advanced
Catalytic Transformation Program for Carbon Utilization (ACT-C), Japan Science and Technology Agency (JST), Tokyo 102-0076, Japan
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Cellulases: Classification, Methods of Determination and Industrial Applications. Appl Biochem Biotechnol 2016; 179:1346-80. [PMID: 27068832 DOI: 10.1007/s12010-016-2070-3] [Citation(s) in RCA: 87] [Impact Index Per Article: 10.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 03/31/2016] [Indexed: 10/22/2022]
Abstract
Microbial cellulases have been receiving worldwide attention, as they have enormous potential to process the most abundant cellulosic biomass on this planet and transform it into sustainable biofuels and other value added products. The synergistic action of endoglucanases, exoglucanases, and β-glucosidases is required for the depolymerization of cellulose to fermentable sugars for transformation in to useful products using suitable microorganisms. The lack of a better understanding of the mechanisms of individual cellulases and their synergistic actions is the major hurdles yet to be overcome for large-scale commercial applications of cellulases. We have reviewed various microbial cellulases with a focus on their classification with mechanistic aspects of cellulase hydrolytic action, insights into novel approaches for determining cellulase activity, and potential industrial applications of cellulases.
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25
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An environmental route of exposure affects the formation of nanoparticle coronas in blood plasma. J Proteomics 2016; 137:52-8. [DOI: 10.1016/j.jprot.2015.10.028] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2015] [Revised: 10/21/2015] [Accepted: 10/30/2015] [Indexed: 12/16/2022]
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Heterologous expression of a hydrophobin HFB1 and evaluation of its contribution to producing stable foam. Protein Expr Purif 2015; 118:25-30. [PMID: 26431799 DOI: 10.1016/j.pep.2015.09.025] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2015] [Revised: 09/22/2015] [Accepted: 09/25/2015] [Indexed: 11/23/2022]
Abstract
Hydrophobins are small secreted proteins belong to filamentous fungi. These proteins possess a unique ability to self-assemble at air/water interfaces. Hydrophobins have a broad range of biotechnological applications such as stabilizing emulsions and foams, immobilizing proteins on a surface, designing biosensors, affinity tag for protein purification, and drug delivery. We have successfully expressed HFB1 from Trichoderma reesei belonged to class II of hydrophobins in Pichia pastoris. The recombinant gene was under the control of the methanol-inducible AOX1 promoter (alcohol oxidase 1) in the pPICZAα vector. The amount of secreted HFB1 was increased in 90-h using methanol induction. The recombinant HFB1 was purified based on the presence of His-tag and foam formation. Furthermore, HFB1 was able to produce macro and micro stable air bubbles in the liquid due to the presence of hydrophobic patches on its surface. The liquid medium containing HFB1 becomes turbid after shaking, and then the stable bubbles are formed and remained for three weeks.
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Shokribousjein Z, Riveros Galan D, Losada-Pérez P, Wagner P, Lammertyn J, Arghir I, Golreihan A, Verachtert H, Aydın AA, De Maeyer M, Titze J, Ilberg V, Derdelinckx G. Mechanism of Nonpolar Model Substances to Inhibit Primary Gushing Induced by Hydrophobin HFBI. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:4673-82. [PMID: 25891388 DOI: 10.1021/acs.jafc.5b01170] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
In this work, the interactions of a well-studied hydrophobin with different types of nonpolar model substances and their impact on primary gushing is evaluated. The nature, length, and degree of saturation of nonpolar molecules are key parameters defining the gushing ability or inhibition. When mixed with hydrophobins, the nonpolar molecule-hydrophobin assembly acts as a less gushing or no gushing system. This effect can be explained in the framework of a competition effect between non-polar systems and CO2 to interact with the hydrophobic patch of the hydrophobin. Interactions of these molecules with hydrophobins are promoted as a result of the similar size of the nonpolar molecules with the hydrophobic patch of the protein, at the expense of the formation of nanobubbles with CO2. In order to prove the presence of interactions and to unravel the mechanisms behind them, a complete set of experimental techniques was used. Surface sensitive techniques clearly show the presence of the interactions, whose nature is not covalent nor hydrogen bonding according to infrared spectroscopy results. Interactions were also reflected by particle size analysis in which mixtures of particles displayed larger size than their pure component counterparts. Upon mixing with nonpolar molecules, the gushing ability of the protein is significantly disrupted.
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Affiliation(s)
- Zahra Shokribousjein
- †KU Leuven, Department of Microbial and Molecular Systems (M2S), and Leuven Food Science and Nutrition Research Centre (LFoRCe-MaltBeerSci), Kasteelpark Arenberg 20, Heverlee, Belgium
| | - David Riveros Galan
- †KU Leuven, Department of Microbial and Molecular Systems (M2S), and Leuven Food Science and Nutrition Research Centre (LFoRCe-MaltBeerSci), Kasteelpark Arenberg 20, Heverlee, Belgium
| | - Patricia Losada-Pérez
- ‡Institute for Materials Research IMO, Hasselt University, Wetenschapspark 1, B-3590, Diepenbeek, Belgium
- §Soft Matter and Biophysics Section, Departement of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D bus 2416, B-3001, Leuven, Belgium
| | - Patrick Wagner
- ‡Institute for Materials Research IMO, Hasselt University, Wetenschapspark 1, B-3590, Diepenbeek, Belgium
- §Soft Matter and Biophysics Section, Departement of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D bus 2416, B-3001, Leuven, Belgium
| | - Jeroen Lammertyn
- ∥KU Leuven, Department of Biosystems, Division of Mechatronics, Biostatistics and Sensors, Willem de Croylaan 42, Heverlee, Belgium
| | - Iulia Arghir
- ∥KU Leuven, Department of Biosystems, Division of Mechatronics, Biostatistics and Sensors, Willem de Croylaan 42, Heverlee, Belgium
| | - Asefeh Golreihan
- ⊥KU Leuven, Department of Earth and Environmental Science, Division of Geology, Celestijnenlaan 200e - box 2410, 3001 Leuven, Belgium
| | - Hubert Verachtert
- †KU Leuven, Department of Microbial and Molecular Systems (M2S), and Leuven Food Science and Nutrition Research Centre (LFoRCe-MaltBeerSci), Kasteelpark Arenberg 20, Heverlee, Belgium
| | - Ahmet Alper Aydın
- #University of Applied Sciences Weihenstephan-Triesdorf, Faculty of Gardening and Food Technology, Am Staudengarten 11, 85350 Freising, Germany
- ¶Chemical Engineering Department, Faculty of Chemical and Metallurgical Engineering, Istanbul Technical University, 34469 Maslak, Istanbul, Turkey
| | - Marc De Maeyer
- ∇KU Leuven, Department of Chemistry, Division of Chemistry, section: Molecular and Structural Biology, Laboratory for Biomolecular Modelling and BioMacS, Heverlee, Belgium
| | - Jean Titze
- ○Döhler GmbH, Riedstraße 7-9, 64295 Darmstadt, Germany
| | - Vladimír Ilberg
- #University of Applied Sciences Weihenstephan-Triesdorf, Faculty of Gardening and Food Technology, Am Staudengarten 11, 85350 Freising, Germany
| | - Guy Derdelinckx
- †KU Leuven, Department of Microbial and Molecular Systems (M2S), and Leuven Food Science and Nutrition Research Centre (LFoRCe-MaltBeerSci), Kasteelpark Arenberg 20, Heverlee, Belgium
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Lee S, Røn T, Pakkanen KI, Linder M. Hydrophobins as aqueous lubricant additive for a soft sliding contact. Colloids Surf B Biointerfaces 2014; 125:264-9. [PMID: 25466456 DOI: 10.1016/j.colsurfb.2014.10.044] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/07/2014] [Accepted: 10/22/2014] [Indexed: 11/19/2022]
Abstract
Two type II fungal hydrophobins, HFBI and FpHYD5, have been studied as aqueous lubricant additive at a nonpolar, compliant sliding contact (self-mated poly(dimethylsiloxane) (PDMS) contact) at two different concentrations, 0.1 mg/mL and 1.0 mg/mL. The two hydrophobins are featured as non-glycosylated (HFBI, m.w. ca. 7 kDa) vs glycosylated (FpHYD5, m.w. ca. 10 kDa) proteins. Far UV CD spectra of the two hydrophobins were very similar, suggesting overall structural similarity, but showed a noticeable difference according to the concentration. This is proposed to be related to the formation of multimers at 1.0 mg/mL. Despite 10-fold difference in the bulk concentration, the adsorbed masses of the hydrophobins onto PDMS surface obtained from the two solutions (0.1 and 1.0 mg/mL) were nearly identical, suggesting that a monolayer of the hydrophobins are formed from 0.1 mg/mL solution. PDMS-PDMS sliding interface was effectively lubricated by the hydrophobin solutions, and showed a reduction in the coefficient of friction by as much as ca. two orders of magnitude. Higher concentration solution (1.0 mg/mL) provided a superior lubrication, particularly in low-speed regime, where boundary lubrication characteristic is dominant via 'self-healing' mechanism. FpHYD5 revealed a better lubrication than HFBI presumably due to the presence of glycans and improved hydration of the sliding interface. Two type II hydrophobins function more favorably compared to a synthetic amphiphilic copolymer, PEO-PPO-PEO, with a similar molecular weight. This is ascribed to higher amount of adsorption of the hydrophobins to hydrophobic surfaces from aqueous solution.
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Affiliation(s)
- Seunghwan Lee
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark.
| | - Troels Røn
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Kirsi I Pakkanen
- Department of Mechanical Engineering, Technical University of Denmark, DK-2800 Kgs. Lyngby, Denmark
| | - Markus Linder
- Technical Research Centre of Finland, VTT Biotechnology, FIN-02044 VTT, Finland; Department of Biotechnology and Chemical Technology, Aalto University, 00076 Aalto, Finland
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Malucelli G, Bosco F, Alongi J, Carosio F, Di Blasio A, Mollea C, Cuttica F, Casale A. Biomacromolecules as novel green flame retardant systems for textiles: an overview. RSC Adv 2014. [DOI: 10.1039/c4ra06771a] [Citation(s) in RCA: 115] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Kurppa K, Hytönen VP, Nakari-Setälä T, Kulomaa MS, Linder MB. Molecular engineering of avidin and hydrophobin for functional self-assembling interfaces. Colloids Surf B Biointerfaces 2014; 120:102-9. [DOI: 10.1016/j.colsurfb.2014.05.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2013] [Revised: 02/03/2014] [Accepted: 05/11/2014] [Indexed: 12/19/2022]
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Hydrophobin film structure for HFBI and HFBII and mechanism for accelerated film formation. PLoS Comput Biol 2014; 10:e1003745. [PMID: 25079355 PMCID: PMC4117420 DOI: 10.1371/journal.pcbi.1003745] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2014] [Accepted: 06/12/2014] [Indexed: 11/24/2022] Open
Abstract
Hydrophobins represent an important group of proteins from both a biological and nanotechnological standpoint. They are the means through which filamentous fungi affect their environment to promote growth, and their properties at interfaces have resulted in numerous applications. In our study we have combined protein docking, molecular dynamics simulation, and electron cryo-microscopy to gain atomistic level insight into the surface structure of films composed of two class II hydrophobins: HFBI and HFBII produced by Trichoderma reesei. Together our results suggest a unit cell composed of six proteins; however, our computational results suggest P6 symmetry, while our experimental results show P3 symmetry with a unit cell size of 56 Å. Our computational results indicate the possibility of an alternate ordering with a three protein unit cell with P3 symmetry and a smaller unit cell size, and we have used a Monte Carlo simulation of a spin model representing the hydrophobin film to show how this alternate metastable structure may play a role in increasing the rate of surface coverage by hydrophobin films, possibly indicating a mechanism of more general significance to both biology and nanotechnology. Filamentous fungi release a specific type of protein, belonging to a protein family known as “hydrophobins” into their environment to control interfaces in a fashion that promotes growth. Such protein coatings are the mechanism that allows for the mycelia to grow out of the water and into the air. When these hydrophobins form films at the air-water interface and on the surface of solid objects immersed in water, they impart properties to those surfaces that has led to their use in a wide range of industrial applications. Of particular interest is the properties they impart to air liquid interfaces, and as a mechanism to bring protective materials to coat nanoparticles in nanotechnology applications. A more detailed knowledge of the structure of these surfaces will allow for augmentation of their function that is possible through genetic engineering of the hydrophobins themselves. In this study we have combined computational and experimental methods to develop atomistic level insight into the structure of this surface for two important hydrophobins: HFBI and HFBII of Trichoderma reesei. In addition to insight into the surface structure, we have uncovered an intriguing possible new mechanism for film formation, which may explain some of the striking properties of hydrophobin films, and could be extended to a more general mechanism.
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Minenko E, Vogel RF, Niessen L. Significance of the class II hydrophobin FgHyd5p for the life cycle of Fusarium graminearum. Fungal Biol 2014; 118:385-93. [PMID: 24742833 DOI: 10.1016/j.funbio.2014.02.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2013] [Revised: 02/03/2014] [Accepted: 02/15/2014] [Indexed: 11/28/2022]
Abstract
Hydrophobins are small secreted proteins ubiquitously found in filamentous fungi. Some hydrophobins were shown to have functions in fungal development, while others lack known function. Class II hydrophobins from Fusarium graminearum and Fusarium culmorum are characterized by formation of low stability aggregates and their solubility in organic solvents. They are economically relevant to the brewing industry because they can induce beer gushing. Since cellular functions of Hyd5p's are still unknown, we analyzed the influence of FgHyd5p on growth and morphology of F. graminearum using FgΔhyd5 knock-out mutants expressing sGFP under the control of the hyd5 promoter and compared them with the performance of the parent wild type strain. Results demonstrate that FgHyd5p does not affect the colony and hyphal morphology. FgHyd5p affects the hydrophobicity of aerial mycelia but had no obvious function in penetration of hyphae through the water air interface. The hydrophobin affects the morphology of conidia, but not their fitness. Different sources of carbon and nitrogen as well as different pH have no effect on the expression of the hyd5 gene, which was demonstrated to be expressed upon growth of F. graminearum on hydrophobic surfaces.
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Surface modification using interfacial assembly of the Streptomyces chaplin proteins. Appl Microbiol Biotechnol 2014; 98:4491-501. [DOI: 10.1007/s00253-013-5463-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 11/27/2013] [Accepted: 12/09/2013] [Indexed: 12/23/2022]
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Alongi J, Carletto RA, Bosco F, Carosio F, Di Blasio A, Cuttica F, Antonucci V, Giordano M, Malucelli G. Caseins and hydrophobins as novel green flame retardants for cotton fabrics. Polym Degrad Stab 2014. [DOI: 10.1016/j.polymdegradstab.2013.11.016] [Citation(s) in RCA: 125] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Zelena K, Takenberg M, Lunkenbein S, Woche SK, Nimtz M, Berger RG. PfaH2: a novel hydrophobin from the ascomycete Paecilomyces farinosus. Biotechnol Appl Biochem 2013; 60:147-54. [PMID: 23600571 DOI: 10.1002/bab.1077] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Accepted: 11/30/2012] [Indexed: 11/08/2022]
Abstract
The pfah2 gene coding for a novel hydrophobin PfaH2 from the ascomycete Paecilomyces farinosus was identified during sequencing of random clones from a cDNA library. The corresponding protein sequence of PfaH2 deduced from the cDNA comprised 134 amino acids (aa). A 16 aa signal sequence preceded the N-terminus of the mature protein. PfaH2 belonged to the class Ia hydrophobins. The protein was isolated using trifluoroacetic acid extraction and purified via SDS-PAGE and high-performance liquid chromatography. The surface activity of the recently described PfaH1 and of PfaH2 was compared by the determination of contact angles (CAs) on glass slides and Teflon tape, and the CA of distilled water droplets was measured on glass slides coated with hydrophobin PfaH1 or PfaH2. Surprisingly, both hydrophobins adsorbed to hydrophilic surfaces and changed their physicochemical properties to a similar quantitative extent, although little aa sequence homology was found.
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Affiliation(s)
- Katerina Zelena
- Naturwissenschaftliche Fakultät der Leibniz Universität Hannover, Institut für Lebensmittelchemie, Hannover, Germany
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Takatsuji Y, Yamasaki R, Iwanaga A, Lienemann M, Linder MB, Haruyama T. Solid-support immobilization of a "swing" fusion protein for enhanced glucose oxidase catalytic activity. Colloids Surf B Biointerfaces 2013; 112:186-91. [PMID: 23974004 DOI: 10.1016/j.colsurfb.2013.07.051] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 07/10/2013] [Accepted: 07/26/2013] [Indexed: 02/04/2023]
Abstract
The strategic surface immobilization of a protein can add new functionality to a solid substrate; however, protein activity, e.g., enzymatic activity, can be drastically decreased on immobilization onto a solid surface. The concept of a designed and optimized "molecular interface" is herein introduced in order to address this problem. In this study, molecular interface was designed and constructed with the aim of attaining high enzymatic activity of a solid-surface-immobilized a using the hydrophobin HFBI protein in conjunction with a fusion protein of HFBI attached to glucose oxidase (GOx). The ability of HFBI to form a self-organized membrane on a solid surface in addition to its adhesion properties makes it an ideal candidate for immobilization. The developed fusion protein was also able to form an organized membrane, and its structure and immobilized state on a solid surface were investigated using QCM-D measurements. This method of immobilization showed retention of high enzymatic activity and the ability to control the density of the immobilized enzyme. In this study, we demonstrated the importance of the design and construction of molecular interface for numerous purposes. This method of protein immobilization could be utilized for preparation of high throughput products requiring structurally ordered molecular interfaces, in addition to many other applications.
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Affiliation(s)
- Yoshiyuki Takatsuji
- Department of Biological Functions and Engineering, Kyushu Institute of Technology, Kitakyushu Science and Research Park, Kitakyushu, Fukuoka, 808-0196, Japan; JST ACT-C, Japan
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38
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Two novel class II hydrophobins from Trichoderma spp. stimulate enzymatic hydrolysis of poly(ethylene terephthalate) when expressed as fusion proteins. Appl Environ Microbiol 2013; 79:4230-8. [PMID: 23645195 DOI: 10.1128/aem.01132-13] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
Poly(ethylene terephthalate) (PET) can be functionalized and/or recycled via hydrolysis by microbial cutinases. The rate of hydrolysis is however low. Here, we tested whether hydrophobins (HFBs), small secreted fungal proteins containing eight positionally conserved cysteine residues, are able to enhance the rate of enzymatic hydrolysis of PET. Species of the fungal genus Trichoderma have the most proliferated arsenal of class II hydrophobin-encoding genes among fungi. To this end, we studied two novel class II HFBs (HFB4 and HFB7) of Trichoderma. HFB4 and HFB7, produced in Escherichia coli as fusions to the C terminus of glutathione S-transferase, exhibited subtle structural differences reflected in hydrophobicity plots that correlated with unequal hydrophobicity and hydrophily, respectively, of particular amino acid residues. Both proteins exhibited a dosage-dependent stimulation effect on PET hydrolysis by cutinase from Humicola insolens, with HFB4 displaying an adsorption isotherm-like behavior, whereas HFB7 was active only at very low concentrations and was inhibitory at higher concentrations. We conclude that class II HFBs can stimulate the activity of cutinases on PET, but individual HFBs can display different properties. The present findings suggest that hydrophobins can be used in the enzymatic hydrolysis of aromatic-aliphatic polyesters such as PET.
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Krivosheeva O, Dėdinaitė A, Linder MB, Tilton RD, Claesson PM. Kinetic and equilibrium aspects of adsorption and desorption of class II hydrophobins HFBI and HFBII at silicon oxynitride/water and air/water interfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:2683-2691. [PMID: 23356719 DOI: 10.1021/la3048888] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Hydrophobins are relatively small globular proteins produced by filamentous fungi. They display unusual high surface activity and are implied as mediators of attachment to surfaces, which has resulted in high scientific and technological interest. In this work we focus on kinetic and equilibrium aspects of adsorption and desorption properties of two representatives of class II hydrophobins, namely HFBI and HFBII, at a negatively charged hydrophilic solid/water interface and at the air/water interface. The layers formed at the air/liquid interface were examined in a Langmuir trough, whereas layers formed at the solid/liquid interface were studied using dual polarization interferometry (DPI) under different flow conditions. For comparison, another globular protein, lysozyme, was also investigated. It was found that both the adsorbed amount and the adsorption kinetics were different for HFBI and HFBII, and the adsorption behavior of both hydrophobins on the negatively charged surface displayed some unusual features. For instance, even though the adsorption rate for HFBI was slowed down with increasing adsorbed amount as expected from packing constraints at the interface, the adsorption kinetics curves for HFBII displayed a region indicating adsorption cooperativity. Further, it was found that hydrophobin layers formed under flow partly desorbed when the flow was stopped, and the desorption rate for HFBII was enhanced in the presence of hydrophobins in solution.
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Affiliation(s)
- Olga Krivosheeva
- School of Chemical Science and Engineering, Department of Chemistry, Division of Surface and Corrosion Science, KTH Royal Institute of Technology, Drottning Kristinas väg 51, SE-100 44 Stockholm, Sweden
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40
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Wang Y, Bouillon C, Cox A, Dickinson E, Durga K, Murray BS, Xu R. Interfacial study of class II hydrophobin and its mixtures with milk proteins: relationship to bubble stability. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2013; 61:1554-1562. [PMID: 23343339 DOI: 10.1021/jf304603m] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Class II hydrophobin (HFBII) is a very promising ingredient for improving food foam stability. Pure HFBII-stabilized bubbles exhibited exceptional stability to disproportionation (dissolution) but were not stable to bubble coalescence induced by a pressure drop. Bubbles stabilized by mixtures of HFBII + sodium caseinate (SC) or β-lactoglobulin (BL) showed decreased shrinkage rates compared to pure SC or BL and improved the stability to pressure-drop-induced coalescence. Higher bubble stability was more closely correlated with higher surface shear viscosity than the surface dilatational elasticity of the mixed protein systems. Brewster angle microscopy observations and the high shear strength of adsorbed films, including HFBII, even in the presence of hydrophobic and hydrogen-bond-breaking agents, confirm that intermolecular attractive cross-links are unlikely to be the origin of the high strength of HFBII films. Possibly the HFBII molecules form a tightly interlocking monolayer of Janus-like particles at the air-water interface.
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Affiliation(s)
- Yiwei Wang
- Food Colloids Group, School of Food Science and Nutrition, University of Leeds, Leeds, United Kingdom
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41
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Liu Y, Wu M, Feng X, Shao X, Cai W. Adsorption Behavior of Hydrophobin Proteins on Polydimethylsiloxane Substrates. J Phys Chem B 2012; 116:12227-34. [DOI: 10.1021/jp304796p] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Yingzhe Liu
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic
of China
| | - Ming Wu
- College of Life
Science, Nankai University, Tianjin, 300071,
People's Republic
of China
| | - Xizeng Feng
- College of Life
Science, Nankai University, Tianjin, 300071,
People's Republic
of China
| | - Xueguang Shao
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic
of China
| | - Wensheng Cai
- College of Chemistry, Nankai University, Tianjin, 300071, People's Republic
of China
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42
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Interfacial layers from the protein HFBII hydrophobin: Dynamic surface tension, dilatational elasticity and relaxation times. J Colloid Interface Sci 2012; 376:296-306. [PMID: 22480400 DOI: 10.1016/j.jcis.2012.03.031] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2011] [Revised: 02/12/2012] [Accepted: 03/12/2012] [Indexed: 11/21/2022]
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Niu B, Huang Y, Zhang S, Wang D, Xu H, Kong D, Qiao M. Expression and characterization of hydrophobin HGFI fused with the cell-specific peptide TPS in Pichia pastoris. Protein Expr Purif 2012; 83:92-7. [DOI: 10.1016/j.pep.2012.03.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2011] [Revised: 03/03/2012] [Accepted: 03/06/2012] [Indexed: 11/26/2022]
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Gruner LJ, Ostermann K, Rödel G. Layer thickness of hydrophobin films leads to oscillation in wettability. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:6942-6949. [PMID: 22458322 DOI: 10.1021/la204252y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In nanobiotechnology, the properties of surfaces are often key to sensor applications. If analytes possess a low tolerance or affinity regarding the sensory substrate (surface), then the setup of mediators may be indicated. Hydrophobins enable biocompatible surface functionalization without significant restrictions of the physicochemical substrate properties. Because of the imperfect formation of hydrophobin films, a high variation in surface properties is observed. In this study, we report on the relation between the film thickness of hydrophobin-coated solid surfaces and their wettability. We found that the wettability of protein-coated surfaces strictly depends on the amount of adsorbed protein, as reflected in an oscillation of the contact angles of hydrophobin-coated silicon wafers. Fusion proteins of Ccg2 and HFBI, representatives of class I and II hydrophobins, document the influence of fused peptide tags on the wettability. The orientation of the first crystal nuclei plays a decisive role in the formation of the growing hydrophobin layers. Here, a simple method of deducing the film thickness of hydrophobin assemblies on solid surfaces is presented. The determination of the static contact angle allows the prediction of which part of the protein is exposed to possible analytes.
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Affiliation(s)
- Leopold J Gruner
- Institute of Genetics, Technische Universität Dresden, 01217 Dresden, Germany.
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Khalesi M, Deckers S, Gebruers K, Vissers L, Verachtert H, Derdelinckx G. Hydrophobins: Exceptional proteins for many applications in brewery environment and other bio-industries. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.cervis.2012.04.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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46
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Grunér MS, Szilvay GR, Berglin M, Lienemann M, Laaksonen P, Linder MB. Self-assembly of class II hydrophobins on polar surfaces. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:4293-4300. [PMID: 22315927 DOI: 10.1021/la300501u] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Hydrophobins are structural proteins produced by filamentous fungi that are amphiphilic and function through self-assembling into structures such as membranes. They have diverse roles in the growth and development of fungi, for example in adhesion to substrates, for reducing surface tension to allow aerial growth, in forming protective coatings on spores and other structures. Hydrophobin membranes at the air-water interface and on hydrophobic solids are well studied, but understanding how hydrophobins can bind to a polar surface to make it more hydrophobic has remained unresolved. Here we have studied different class II hydrophobins for their ability to bind to polar surfaces that were immersed in buffer solution. We show here that the binding under some conditions results in a significant increase of water contact angle (WCA) on some surfaces. The highest contact angles were obtained on cationic surfaces where the hydrophobin HFBI has an average WCA of 62.6° at pH 9.0, HFBII an average of 69.0° at pH 8.0, and HFBIII had an average WCA of 61.9° at pH 8.0. The binding of the hydrophobins to the positively charged surface was shown to depend on both pH and ionic strength. The results are significant for understanding the mechanism for formation of structures such as the surface of mycelia or fungal spore coatings as well as for possible technical applications.
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Affiliation(s)
- Mathias S Grunér
- VTT Technical Research Centre of Finland, Biotechnology, Espoo, Finland
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47
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Kottmeier K, Günther TJ, Weber J, Kurtz S, Ostermann K, Rödel G, Bley T. Constitutive expression of hydrophobin HFB1 from Trichoderma reesei in Pichia pastoris and its pre-purification by foam separation during cultivation. Eng Life Sci 2012. [DOI: 10.1002/elsc.201100155] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Affiliation(s)
| | - Tobias Jan Günther
- Institute of Radiochemistry; Helmholtz-Zentrum Dresden-Rossendorf; Dresden; Germany
| | - Jost Weber
- Institute of Food Technology and Bioprocess Engineering; Technische Universität Dresden; Dresden; Germany
| | - Susann Kurtz
- Technische Universität Dresden; Institute of Genetics; Dresden; Germany
| | - Kai Ostermann
- Technische Universität Dresden; Institute of Genetics; Dresden; Germany
| | - Gerhard Rödel
- Technische Universität Dresden; Institute of Genetics; Dresden; Germany
| | - Thomas Bley
- Institute of Food Technology and Bioprocess Engineering; Technische Universität Dresden; Dresden; Germany
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Rieder A, Ladnorg T, Wöll C, Obst U, Fischer R, Schwartz T. The impact of recombinant fusion-hydrophobin coated surfaces on E. coli and natural mixed culture biofilm formation. BIOFOULING 2011; 27:1073-1085. [PMID: 22047093 DOI: 10.1080/08927014.2011.631168] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The impact of increased surface hydrophobicity on biofilms regarding retardation, repulsion, or attraction was studied with hydrophobin modified glass substrata. Recombinantly produced fungal hydrophobins forming self-assembled monolayers were used as the surface coating. The adsorption dynamics of hydrophobins were analysed with a quartz crystal microbalance which showed the surface coating to be rapid and stable. The change of surface wettability was determined by water contact angle measurements and demonstrated an increase in hydrophobicity in range of 60-62°. The homogeneity of the monolayers was demonstrated by immunofluorescence microscopy. Atomic force microscopy was applied to visualise the uniform texture of the coated materials. The hydrophobin coatings had no impact on different biofilms in terms of spatial distribution, cell numbers, and population composition. In consequence, hydrophobicity might not represent an important parameter for biofilm formation. Nevertheless, recombinant hydrophobins are suitable for large scale surface modification and functionalization with bioactive molecules.
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Affiliation(s)
- Annika Rieder
- Microbiology of Natural and Technical Interfaces Department, Institute of Functional Interfaces, Karlsruhe Institute of Technology, Karlsruhe, Germany
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49
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Iwanaga A, Asakawa H, Fukuma T, Nakamichi M, Shigematsu S, Linder MB, Haruyama T. Ordered nano-structure of a stamped self-organized protein layer on a HOPG surface using a HFB carrier. Colloids Surf B Biointerfaces 2011; 84:395-9. [DOI: 10.1016/j.colsurfb.2011.01.032] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 12/24/2010] [Accepted: 01/22/2011] [Indexed: 10/18/2022]
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50
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Conley AJ, Joensuu JJ, Richman A, Menassa R. Protein body-inducing fusions for high-level production and purification of recombinant proteins in plants. PLANT BIOTECHNOLOGY JOURNAL 2011; 9:419-33. [PMID: 21338467 DOI: 10.1111/j.1467-7652.2011.00596.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
For the past two decades, therapeutic and industrially important proteins have been expressed in plants with varying levels of success. The two major challenges hindering the economical production of plant-made recombinant proteins include inadequate accumulation levels and the lack of efficient purification methods. To address these limitations, several fusion protein strategies have been recently developed to significantly enhance the production yield of plant-made recombinant proteins, while simultaneously assisting in their subsequent purification. Elastin-like polypeptides are thermally responsive biopolymers composed of a repeating pentapeptide 'VPGXG' sequence that are valuable for the purification of recombinant proteins. Hydrophobins are small fungal proteins capable of altering the hydrophobicity of their respective fusion partner, thus enabling efficient purification by surfactant-based aqueous two-phase systems. Zera, a domain of the maize seed storage protein γ-zein, can induce the formation of protein storage bodies, thus facilitating the recovery of fused proteins using density-based separation methods. These three novel protein fusion systems have also been shown to enhance the accumulation of a range of different recombinant proteins, while concurrently inducing the formation of protein bodies. The packing of these fusion proteins into protein bodies may exclude the recombinant protein from normal physiological turnover. Furthermore, these systems allow for quick, simple and inexpensive nonchromatographic purification of the recombinant protein, which can be scaled up to industrial levels of protein production. This review will focus on the similarities and differences of these artificial storage organelles, their biogenesis and their implication for the production of recombinant proteins in plants and their subsequent purification.
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Affiliation(s)
- Andrew J Conley
- Southern Crop Protection and Food Research Centre, Agriculture and Agri-Food Canada, London, ON, Canada
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