1
|
Ó Conghaile P, Arrigan DWM. Ubiquinone electrochemistry in analysis and sensing. ELECTROCHEMICAL SCIENCE ADVANCES 2022. [DOI: 10.1002/elsa.202100214] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Affiliation(s)
- Peter Ó Conghaile
- School of Molecular and Life Sciences Curtin University Perth Australia
- School of Chemistry & Ryan Institute National University of Ireland Galway University Road Galway H91 TK33 Ireland
| | | |
Collapse
|
2
|
Landeta-Salgado C, Cicatiello P, Lienqueo ME. Mycoprotein and hydrophobin like protein produced from marine fungi Paradendryphiella salina in submerged fermentation with green seaweed Ulva spp. ALGAL RES 2021. [DOI: 10.1016/j.algal.2021.102314] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
3
|
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]
|
4
|
Gorman A, Zhang X, Risteen B, Tassone CJ, Russo PS. Characterization of Submicron Bubbles Formed by the Hydrophobin Cerato-ulmin. J Phys Chem B 2019; 123:3955-3961. [DOI: 10.1021/acs.jpcb.9b01673] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
| | | | | | - Christopher J. Tassone
- Stanford Synchrotron Radiation Laboratory, Stanford Linear Accelerator Center, Stanford, California 94025, United States
| | | |
Collapse
|
5
|
Fungal Hydrophobins and Their Self-Assembly into Functional Nanomaterials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2019; 1174:161-185. [DOI: 10.1007/978-981-13-9791-2_5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
6
|
Brand I, Sęk S. Preface. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.05.042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
7
|
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]
|
8
|
Applications of Functional Amyloids from Fungi: Surface Modification by Class I Hydrophobins. Biomolecules 2017; 7:biom7030045. [PMID: 28672843 PMCID: PMC5618226 DOI: 10.3390/biom7030045] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Revised: 06/20/2017] [Accepted: 06/22/2017] [Indexed: 12/20/2022] Open
Abstract
Class I hydrophobins produced from fungi are amongst the first proteins recognized as functional amyloids. They are amphiphilic proteins involved in the formation of aerial structures such as spores or fruiting bodies. They form chemically robust layers which can only be dissolved in strong acids. These layers adhere to different surfaces, changing their wettability, and allow the binding of other proteins. Herein, the modification of diverse types of surfaces with Class I hydrophobins is reported, highlighting the applications of the coated surfaces. Indeed, these coatings can be exploited in several fields, spanning from biomedical to industrial applications, which include biosensing and textile manufacturing.
Collapse
|
9
|
A hydrophobic coenzyme Q10 stabilized functionalized-MWCNT modified electrode as an efficient functional biomimetic system for the electron-transfer study. Colloids Surf A Physicochem Eng Asp 2016. [DOI: 10.1016/j.colsurfa.2016.05.048] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
10
|
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.
Collapse
|
11
|
Hydrophobin-Based Surface Engineering for Sensitive and Robust Quantification of Yeast Pheromones. SENSORS 2016; 16:s16050602. [PMID: 27128920 PMCID: PMC4883293 DOI: 10.3390/s16050602] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 03/31/2016] [Accepted: 04/20/2016] [Indexed: 02/05/2023]
Abstract
Detection and quantification of small peptides, such as yeast pheromones, are often challenging. We developed a highly sensitive and robust affinity-assay for the quantification of the α-factor pheromone of Saccharomyces cerevisiae based on recombinant hydrophobins. These small, amphipathic proteins self-assemble into highly stable monolayers at hydrophilic-hydrophobic interfaces. Upon functionalization of solid supports with a combination of hydrophobins either lacking or exposing the α-factor, pheromone-specific antibodies were bound to the surface. Increasing concentrations of the pheromone competitively detached the antibodies, thus allowing for quantification of the pheromone. By adjusting the percentage of pheromone-exposing hydrophobins, the sensitivity of the assay could be precisely predefined. The assay proved to be highly robust against changes in sample matrix composition. Due to the high stability of hydrophobin layers, the functionalized surfaces could be repeatedly used without affecting the sensitivity. Furthermore, by using an inverse setup, the sensitivity was increased by three orders of magnitude, yielding a novel kind of biosensor for the yeast pheromone with the lowest limit of detection reported so far. This assay was applied to study the pheromone secretion of diverse yeast strains including a whole-cell biosensor strain of Schizosaccharomyces pombe modulating α-factor secretion in response to an environmental signal.
Collapse
|
12
|
Applications of hydrophobins: current state and perspectives. Appl Microbiol Biotechnol 2015; 99:1587-97. [PMID: 25564034 DOI: 10.1007/s00253-014-6319-x] [Citation(s) in RCA: 103] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 12/08/2014] [Accepted: 12/09/2014] [Indexed: 01/07/2023]
Abstract
Hydrophobins are proteins exclusively produced by filamentous fungi. They self-assemble at hydrophilic-hydrophobic interfaces into an amphipathic film. This protein film renders hydrophobic surfaces of gas bubbles, liquids, or solid materials wettable, while hydrophilic surfaces can be turned hydrophobic. These properties, among others, make hydrophobins of interest for medical and technical applications. For instance, hydrophobins can be used to disperse hydrophobic materials; to stabilize foam in food products; and to immobilize enzymes, peptides, antibodies, cells, and anorganic molecules on surfaces. At the same time, they may be used to prevent binding of molecules. Furthermore, hydrophobins have therapeutic value as immunomodulators and can been used to produce recombinant proteins.
Collapse
|
13
|
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]
|
14
|
Ren Q, Kwan AH, Sunde M. Solution structure and interface-driven self-assembly of NC2, a new member of the Class II hydrophobin proteins. Proteins 2013; 82:990-1003. [PMID: 24218020 DOI: 10.1002/prot.24473] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2013] [Revised: 10/20/2013] [Accepted: 10/29/2013] [Indexed: 11/10/2022]
Abstract
Hydrophobins are fungal proteins that self-assemble spontaneously to form amphipathic monolayers at hydrophobic:hydrophilic interfaces. Hydrophobin assemblies facilitate fungal transitions between wet and dry environments and interactions with plant and animal hosts. NC2 is a previously uncharacterized hydrophobin from Neurospora crassa. It is a highly surface active protein and is able to form protein layers on a water:air interface that stabilize air bubbles. On a hydrophobic substrate, NC2 forms layers consisting of an ordered network of protein molecules, which dramatically decrease the water contact angle. The solution structure and dynamics of NC2 have been determined using nuclear magnetic resonance spectroscopy. The structure of this protein displays the same core fold as observed in other hydrophobin structures determined to date, including the Class II hydrophobins HFBI and HFBII from Trichoderma reesei, but certain features illuminate the structural differences between Classes I and II hydrophobins and also highlight the variations between structures of Class II hydrophobin family members. The unique properties of hydrophobins have attracted much attention for biotechnology applications. The insights obtained through determining the structure, biophysical properties and assembly characteristics of NC2 will facilitate the development of hydrophobin-based applications.
Collapse
Affiliation(s)
- Qin Ren
- Discipline of Pharmacology, School of Medical Sciences, University of Sydney, Sydney, New South Wales, 2006, Australia
| | | | | |
Collapse
|
15
|
Melchiorri AJ, Hibino N, Fisher JP. Strategies and techniques to enhance the in situ endothelialization of small-diameter biodegradable polymeric vascular grafts. TISSUE ENGINEERING PART B-REVIEWS 2013; 19:292-307. [PMID: 23252992 DOI: 10.1089/ten.teb.2012.0577] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Due to the lack of success in small-diameter (<6 mm) prosthetic vascular grafts, a variety of strategies have evolved utilizing a tissue-engineering approach. Much of this work has focused on enhancing the endothelialization of these grafts. A healthy, confluent endothelial layer provides dynamic control over homeo-stasis, influencing and preventing thrombosis and smooth muscle cell proliferation that can lead to intimal hyperplasia. Strategies to improve endothelialization of biodegradable polymeric grafts have encompassed both chemical and physical modifications to graft surfaces, many focusing on the recruitment of endothelial and endothelial progenitor cells. This review aims to provide a compilation of current and developing strategies that utilize in situ endothelialization to improve vascular graft outcomes, providing a context for the future directions of vascular tissue-engineering strategies that do not require preprocedural cell seeding.
Collapse
Affiliation(s)
- Anthony J Melchiorri
- Fischell Department of Bioengineering, University of Maryland, College Park, Maryland 20742, USA.
| | | | | |
Collapse
|
16
|
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]
|
17
|
Yosypchuk B, Mareček V. Properties of thiolate monolayers formed on different amalgam electrodes. J Electroanal Chem (Lausanne) 2011. [DOI: 10.1016/j.jelechem.2011.01.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
18
|
Wang Z, Feng S, Huang Y, Li S, Xu H, Zhang X, Bai Y, Qiao M. Expression and characterization of a Grifola frondosa hydrophobin in Pichia pastoris. Protein Expr Purif 2010; 72:19-25. [DOI: 10.1016/j.pep.2010.03.017] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 03/23/2010] [Accepted: 03/23/2010] [Indexed: 10/19/2022]
|
19
|
Wang Z, Feng S, Huang Y, Qiao M, Zhang B, Xu H. Prokaryotic expression, purification, and polyclonal antibody production of a hydrophobin from Grifola frondosa. Acta Biochim Biophys Sin (Shanghai) 2010; 42:388-95. [PMID: 20539938 DOI: 10.1093/abbs/gmq033] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Hydrophobins are small fungal proteins that self-assemble spontaneously at hydrophilic-hydrophobic interfaces and change the polar nature of the surfaces to which they attach. A new hydrophobin gene hgfI was identified recently from the edible mushroom Grifola frondosa. In this paper, the cloning, expression, purification, and polyclonal antibody preparation of the HGFI were described. The hgfI gene was cloned into pET-28a expression plasmid at the EcoRI and NdeI restriction sites and then transformed into Escherichia coli BL21 strain. SDSPAGE analysis showed that recombinant HGFI protein was satisfactorily expressed by optimizing the concentration and induction time of IPTG. The expressed recombinant HGFI protein was purified by electroelution because its inclusion body was insoluble in traditional processing method. After a desalting procedure with Sephadex G-25, the recombinant HGFI protein was used to immunize adult rabbits following standard protocol. ELISA and western blot analysis indicated that the produced antiserum could detect both HGFI protein expressed in the prokaryotic (E. coli) and in the eukaryotic cells (G. frondosa). Furthermore, the antiserum was used to determine the localization of HGFI protein in G. frondosa cells using an immunofluorescence technique. The results demonstrated that HGFI protein was localized in the cell wall, especially at the budding position of hypha. The polyclonal antibody against HGFI will facilitate further production and functional study of HGFI protein.
Collapse
|
20
|
Haas Jimoh Akanbi M, Post E, Meter-Arkema A, Rink R, Robillard GT, Wang X, Wösten HA, Scholtmeijer K. Use of hydrophobins in formulation of water insoluble drugs for oral administration. Colloids Surf B Biointerfaces 2010; 75:526-31. [DOI: 10.1016/j.colsurfb.2009.09.030] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2009] [Revised: 08/26/2009] [Accepted: 09/22/2009] [Indexed: 11/16/2022]
|
21
|
Influence of copper hexacyanoferrate film thickness on the electrochemical properties of self-assembled 3-mercaptopropyl gold electrode and application as a hydrazine sensor. J Solid State Electrochem 2009. [DOI: 10.1007/s10008-009-0965-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
22
|
Self-assembled film of hydrophobins on gold surfaces and its application to electrochemical biosensing. Colloids Surf B Biointerfaces 2009; 71:102-6. [DOI: 10.1016/j.colsurfb.2009.01.011] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2008] [Revised: 01/09/2009] [Accepted: 01/12/2009] [Indexed: 11/23/2022]
|
23
|
Li XM, Gu SS, Zhang SS. Hybridization Signal Enhancement via Long-Stranded Probe for Detection of DNA Using Aquadichloro (Benzimidazole)-Copper(II) as Hybridization Indicator. Oligonucleotides 2008; 18:287-94. [DOI: 10.1089/oli.2008.0132] [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)
- Xue-Mei Li
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, People’s Republic of China
| | - Shan-Shan Gu
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, People’s Republic of China
| | - Shu-Sheng Zhang
- Key Laboratory of Eco-chemical Engineering, Ministry of Education, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, People’s Republic of China
| |
Collapse
|
24
|
Nanostructured carbon electrodes for laccase-catalyzed oxygen reduction without added mediators. Electrochim Acta 2008. [DOI: 10.1016/j.electacta.2007.09.053] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
|
25
|
Hektor HJ, Scholtmeijer K. Hydrophobins: proteins with potential. Curr Opin Biotechnol 2007; 16:434-9. [PMID: 15950452 DOI: 10.1016/j.copbio.2005.05.004] [Citation(s) in RCA: 142] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2005] [Revised: 05/01/2005] [Accepted: 05/26/2005] [Indexed: 11/28/2022]
Abstract
Hydrophobins are self-assembling proteins of fungal origin. Their ability to self-assemble into an amphipathic membrane is of interest for many different applications, ranging from medical and technical coatings to the production of proteinaceous glue and cosmetics. Assembled hydrophobins can modify surface characteristics, thus controling the binding properties of the surface; for example, enzymes can be actively and non-covalently immobilized on electrode surfaces and medical coatings can be improved for biocompatibility. Over the past few years research on hydrophobins has contributed to a better understanding of the self-assembly process and is generating more handles to control and manipulate the process. This knowledge could have an immediate effect on production levels, which are not yet adequate, and provide the boost needed for hydrophobins to reach their full potential.
Collapse
Affiliation(s)
- Harm J Hektor
- BiOMaDe Technology Foundation, Nijenborgh 4, 9747 AG Groningen, The Netherlands.
| | | |
Collapse
|
26
|
Corvis Y, Walcarius A, Rink R, Mrabet NT, Rogalska E. Preparing catalytic surfaces for sensing applications by immobilizing enzymes via hydrophobin layers. Anal Chem 2007; 77:1622-30. [PMID: 15762565 DOI: 10.1021/ac048897w] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Simple and reliable immobilization techniques that preserve the activity of enzymes are of interest in many technologies based on catalysis. Here, two redox enzymes, glucose oxidase from Aspergillus niger and horseradish peroxidase, were immobilized by physisorption on glassy carbon electrodes coated with Schizophyllum commune hydrophobin. Hydrophobins are small, interfacially active proteins that have the remarkable property of adhering to almost any surface. We showed recently that these proteins can be used to immobilize small, electroactive molecules. The results obtained in this work show a way to easily manufacture stable, enzyme-based catalytic surfaces for applications in biosensing.
Collapse
Affiliation(s)
- Yohann Corvis
- Groupe d'Etude des Vecteurs Supramoléculaires du Médicament UMR 7565 CNRS/Université Henri Poincaré Nancy 1, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
| | | | | | | | | |
Collapse
|
27
|
Zhao ZX, Qiao MQ, Yin F, Shao B, Wu BY, Wang YY, Wang XS, Qin X, Li S, Yu L, Chen Q. Amperometric glucose biosensor based on self-assembly hydrophobin with high efficiency of enzyme utilization. Biosens Bioelectron 2007; 22:3021-7. [PMID: 17306526 DOI: 10.1016/j.bios.2007.01.007] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 11/10/2006] [Accepted: 01/08/2007] [Indexed: 10/23/2022]
Abstract
Hydrophobins are a family of natural self-assembling proteins with high biocompability, which are apt to form strong and ordered assembly onto many kinds of surfaces. These physical-chemical and biological properties make hydrophobins suitable for surface modification and biomolecule immobilization purposes. A class II hydrophobin HFBI was used as enzyme immobilization matrix on platinum electrode to construct amperometric glucose biosensor. Permeability of HFBI self-assembling film was optimized by selecting the proper HFBI concentration for electrode modification, in order to allow H(2)O(2) permeating while prevent interfering compounds accessing. HFBI self-assembly and glucose oxidase (GOx) immobilization was monitored by quartz crystal microbalance (QCM), and characterization of the modified electrode surface was obtained by scanning electron microscope (SEM). The resulting glucose biosensors showed rapid response time within 6s, limits of detection of 0.09 mM glucose (signal-to-noise ratio=3), wide linear range from 0.5 to 20mM, high sensitivity of 4.214 x 10(-3)AM(-1)cm(-2), also well selectivity, reproducibility and lifetime. The all-protein modified biosensor exhibited especially high efficiency of enzyme utilization, producing at most 712 microA responsive current for per unit activity of GOx. This work provided a promising new immobilization matrix with high biocompatibility and adequate electroactivity for further research in biosensing and other surface functionalizing.
Collapse
Affiliation(s)
- Zi-Xia Zhao
- The Key Laboratory of Bioactive Materials Ministry of Education, College of Life Sciences, Nankai University, Tianjin 300071, China
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Fan H, Wang X, Zhu J, Robillard GT, Mark AE. Molecular dynamics simulations of the hydrophobin SC3 at a hydrophobic/hydrophilic interface. Proteins 2006; 64:863-73. [PMID: 16770796 DOI: 10.1002/prot.20936] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hydrophobins are small ( approximately 100 aa) proteins that have an important role in the growth and development of mycelial fungi. They are surface active and, after secretion by the fungi, self-assemble into amphipathic membranes at hydrophobic/hydrophilic interfaces, reversing the hydrophobicity of the surface. In this study, molecular dynamics simulation techniques have been used to model the process by which a specific class I hydrophobin, SC3, binds to a range of hydrophobic/hydrophilic interfaces. The structure of SC3 used in this investigation was modeled based on the crystal structure of the class II hydrophobin HFBII using the assumption that the disulfide pairings of the eight conserved cysteine residues are maintained. The proposed model for SC3 in aqueous solution is compact and globular containing primarily beta-strand and coil structures. The behavior of this model of SC3 was investigated at an air/water, an oil/water, and a hydrophobic solid/water interface. It was found that SC3 preferentially binds to the interfaces via the loop region between the third and fourth cysteine residues and that binding is associated with an increase in alpha-helix formation in qualitative agreement with experiment. Based on a combination of the available experiment data and the current simulation studies, we propose a possible model for SC3 self-assembly on a hydrophobic solid/water interface.
Collapse
Affiliation(s)
- Hao Fan
- Groningen Biomolecular Sciences and Biotechnology Institute (GBB), Department of Biophysical Chemistry, University of Groningen, Groningen, the Netherlands
| | | | | | | | | |
Collapse
|
29
|
Corvis Y, Brezesinski G, Rink R, Walcarius A, Van der Heyden A, Mutelet F, Rogalska E. Analytical Investigation of the Interactions between SC3 Hydrophobin and Lipid Layers: Elaborating of Nanostructured Matrixes for Immobilizing Redox Systems. Anal Chem 2006; 78:4850-64. [PMID: 16841903 DOI: 10.1021/ac0602064] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Hydrophobins are highly tensioactive fungal proteins with a pronounced affinity for interfaces and a propensity for self-assembly. Recently, these proteins were shown to be useful in retaining different molecules on solid surfaces. This finding offers a possibility for developing new functional materials, while creating the necessity of further research at a deeper mechanistic level. In this work, the mechanisms governing the surface phenomena were studied using native Schizophyllum commune hydrophobin (SC3) and lipid mono- and bilayers; the soft matter systems were used to get a handle on the interactive protein/interface effects at a molecular level. The results obtained indicated that the SC3/lipid membrane interactions were adjusted by protein conformational adaptation, allowing its incorporation into lipid matrixes; the incorporation of a chelating SC3 hydrophobin (PFA-SC3) in a monoolein cubic phase yielded a biomimetic, cell-like system of Cu(II) cation immobilization. This system, which is suitable for modifying electrode surface and monitoring the Cu(II)/Cu(0) redox process, may be of practical interest in switching and sensing.
Collapse
Affiliation(s)
- Yohann Corvis
- Groupe d'Etude des Vecteurs Supramoléculaires du Médicament UMR 7565 CNRS/Université Henri Poincaré Nancy 1, Faculté des Sciences, BP 239, 54506 Vandoeuvre-lès-Nancy Cedex, France
| | | | | | | | | | | | | |
Collapse
|
30
|
Linder MB, Szilvay GR, Nakari-Setälä T, Penttilä ME. Hydrophobins: the protein-amphiphiles of filamentous fungi. FEMS Microbiol Rev 2005; 29:877-96. [PMID: 16219510 DOI: 10.1016/j.femsre.2005.01.004] [Citation(s) in RCA: 412] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2004] [Revised: 12/20/2004] [Accepted: 01/21/2005] [Indexed: 11/22/2022] Open
Abstract
Hydrophobins are surface active proteins produced by filamentous fungi. They have a role in fungal growth as structural components and in the interaction of fungi with their environment. They have, for example, been found to be important for aerial growth, and for the attachment of fungi to solid supports. Hydrophobins also render fungal structures, such as spores, hydrophobic. The biophysical properties of the isolated proteins are remarkable, such as strong adhesion, high surface activity and the formation of various self-assembled structures. The first high resolution three dimensional structure of a hydrophobin, HFBII from Trichoderma reesei, was recently solved. In this review, the properties of hydrophobins are analyzed in light of these new data. Various application possibilities are also discussed.
Collapse
Affiliation(s)
- Markus B Linder
- VTT Biotechnology, Tietotie 2, P.O.Box 1500, FIN-02044 VTT, Finland.
| | | | | | | |
Collapse
|
31
|
Li MG, Shang YJ, Gao YC, Wang GF, Fang B. Preparation of novel mercury-doped silver nanoparticles film glassy carbon electrode and its application for electrochemical biosensor. Anal Biochem 2005; 341:52-7. [PMID: 15866527 DOI: 10.1016/j.ab.2005.02.014] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2004] [Indexed: 11/24/2022]
Abstract
A novel mercury-doped silver nanoparticles film glassy carbon (Ag/MFGC) electrode was prepared in this study. Electrochemical behaviors of cysteine on the Ag/MFGC electrode were investigated by electrochemical impedance spectroscopy and cyclic voltammetry (CV). The results indicated that cysteine could be strongly adsorbed on the surface of the Ag/MFGC electrode to form a thin layer. The doped electrode could catalyze the electrode reaction process of cysteine, and the cysteine displayed a pair of well-defined and nearly reversible CV peaks at the electrode in an acetate buffer solution (pH 5.0). The Ag/MFGC electrode was used for determination of cysteine by differential pulse voltammetry. The linear range was between 4.0x10(-7) and 1.3x10(-5) mol/L, with a detection limit of 1.0x10(-7) mol/L and a signal-to-noise ratio of 3. The relative standard deviation was 2.4% for seven successive determinations of 1.0x10(-5) mol/L cysteine. The determinations of cysteine in synthetic samples and urinal samples were carried out and satisfactory results were obtained. Amperometric application of the Ag/MFGC electrode as biosensors is proposed.
Collapse
Affiliation(s)
- Mao-Guo Li
- School of Chemistry and Materials Science, Anhui Normal University, Wuhu 241000, People's Republic of China
| | | | | | | | | |
Collapse
|
32
|
Expression and Engineering of Fungal Hydrophobins. ACTA ACUST UNITED AC 2005. [DOI: 10.1016/s1874-5334(05)80012-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
33
|
Rowiński P, Bilewicz R, Stébé MJ, Rogalska E. A concept for immobilizing catalytic complexes on electrodes: cubic phase layers for carbon dioxide sensing. Anal Chem 2002; 74:1554-9. [PMID: 12033244 DOI: 10.1021/ac011088h] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Liquid crystalline cubic phases formed with monoolein and Myverol have been used as matrixes to host a catalytic complex of nickel(II) and 1-hexadecyl-1,4,8,11-tetraazacyclotetradecane for the reduction of carbon dioxide. The structures of the cubic phases, both with and without the catalyst, were established using small-angle X-ray scattering. The catalytic reduction of carbon dioxide was performed using thin mercury film and glassy carbon electrodes modified with cubic phases containing the catalyst. The linear dependence of the catalytic reduction current on the carbon dioxide concentration allowed use of the modified electrodes as sensing devices both in solution and in the gas phase. The high reproducibility of the measurements makes this method of monitoring carbon dioxide levels attractive compared to other methods based on modified electrodes.
Collapse
|