1
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Murugan S, Iqbal T, Das D. Functional production and biochemical investigation of an integral membrane enzyme for olefin biosynthesis. Protein Sci 2024; 33:e4893. [PMID: 38160318 PMCID: PMC10804661 DOI: 10.1002/pro.4893] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2023] [Revised: 12/24/2023] [Accepted: 12/28/2023] [Indexed: 01/03/2024]
Abstract
Integral membrane enzymes play essential roles in a plethora of biochemical processes. The fatty acid desaturases (FADS)-like superfamily is an important group of integral membrane enzymes that catalyze a wide array of reactions, including hydroxylation, desaturation, and cyclization; however, due to the membrane-bound nature, the majority of these enzymes have remained poorly understood. UndB is a member of the FADS-like superfamily, which catalyzes fatty acid decarboxylation, a chemically challenging reaction at the membrane interface. UndB reaction produces terminal olefins that are prominent biofuel candidates and building blocks of polymers with widespread industrial applications. Despite the great importance of UndB for several biotechnological applications, the enzyme has eluded comprehensive investigation. Here, we report details of the expression, solubilization, and purification of several constructs of UndB to achieve the optimally functional enzyme. We gained important insights into the biochemical, biophysical, and catalytic properties of UndB, including the thermal stability and factors influencing the enzyme activity. Additionally, we established the ability and kinetics of UndB to produce dienes by performing di-decarboxylation of diacids. We found that the reaction proceeds by forming a mono-carboxylic acid intermediate. Our findings shed light on the unexplored biochemical properties of the UndB and extend opportunities for its rigorous mechanistic and structural characterization.
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Affiliation(s)
- Subhashini Murugan
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
| | - Tabish Iqbal
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
| | - Debasis Das
- Department of Inorganic and Physical ChemistryIndian Institute of ScienceBangaloreIndia
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2
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Shen J, Zhang S, Fang X, Salmon S. Carbonic Anhydrase Enhanced UV-Crosslinked PEG-DA/PEO Extruded Hydrogel Flexible Filaments and Durable Grids for CO 2 Capture. Gels 2023; 9:gels9040341. [PMID: 37102953 PMCID: PMC10137505 DOI: 10.3390/gels9040341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 04/08/2023] [Accepted: 04/14/2023] [Indexed: 04/28/2023] Open
Abstract
In this study, poly (ethylene glycol) diacrylate/poly (ethylene oxide) (PEG-DA/PEO) interpenetrating polymer network hydrogels (IPNH) were extruded into 1D filaments and 2D grids. The suitability of this system for enzyme immobilization and CO2 capture application was validated. IPNH chemical composition was verified spectroscopically using FTIR. The extruded filament had an average tensile strength of 6.5 MPa and elongation at break of 80%. IPNH filament can be twisted and bent and therefore is suitable for further processing using conventional textile fabrication methods. Initial activity recovery of the entrapped carbonic anhydrase (CA) calculated from esterase activity, showed a decrease with an increase in enzyme dose, while activity retention of high enzyme dose samples was over 87% after 150 days of repeated washing and testing. IPNH 2D grids that were assembled into spiral roll structured packings exhibited increased CO2 capture efficiency with increasing enzyme dose. Long-term CO2 capture performance of the CA immobilized IPNH structured packing was tested in a continuous solvent recirculation experiment for 1032 h, where 52% of the initial CO2 capture performance and 34% of the enzyme contribution were retained. These results demonstrate the feasibility of using rapid UV-crosslinking to form enzyme-immobilized hydrogels by a geometrically-controllable extrusion process that uses analogous linear polymers for both viscosity enhancement and chain entanglement purposes, and achieves high activity retention and performance stability of the immobilized CA. Potential uses for this system extend to 3D printing inks and enzyme immobilization matrices for such diverse applications as biocatalytic reactors and biosensor fabrication.
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Affiliation(s)
- Jialong Shen
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA
| | - Sen Zhang
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA
| | - Xiaomeng Fang
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA
| | - Sonja Salmon
- Department of Textile Engineering, Chemistry and Science, Wilson College of Textiles, North Carolina State University, Raleigh, NC 27695-8301, USA
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3
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Deep eutectic systems for carbonic anhydrase extraction from microalgae biomass to improve carbon dioxide solubilization. J CO2 UTIL 2022. [DOI: 10.1016/j.jcou.2022.102225] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Zhou Y, Pedersen JN, Pedersen JN, Jones NC, Hoffmann SV, Petersen SV, Pedersen JS, Perriman A, Gao R, Guo Z. Superanionic Solvent-Free Liquid Enzymes Exhibit Enhanced Structures and Activities. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2202359. [PMID: 35988154 PMCID: PMC9661855 DOI: 10.1002/advs.202202359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 07/06/2022] [Indexed: 06/15/2023]
Abstract
The surface of a carboxylate-enriched octuple mutant of Bacillus subtilis lipase A (8M) is chemically anionized to produce core (8M)-shell (cationic polymer surfactants) bionanoconjugates in protein liquid form, which are termed anion-type biofluids. The resultant lipase biofluids exhibit a 2.5-fold increase in hydrolytic activity when compared with analogous lipase biofluids based on anionic polymer surfactants. In addition, the applicability of the anion-type biofluid using Myoglobin (Mb) that is well studied in anion-type solvent-free liquid proteins is evaluated. Although anionization resulted in the complete unfolding of Mb, the active α-helix level is partially recovered in the anion-type biofluids, and the effect is accentuated in the cation-type Mb biofluids. These highly active anion-type solvent-free liquid enzymes exhibit increased thermal stability and provide a new direction in solvent-free liquid protein research.
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Affiliation(s)
- Ye Zhou
- Key Laboratory for Molecular Enzymology and EngineeringThe Ministry of EducationSchool of Life SciencesJilin UniversityNo. 2699, Qianjin StreetChangchun130012P. R. China
- Department of Biological and Chemical EngineeringAarhus UniversityGustav Wieds Vej 10Aarhus8000Denmark
| | - Jannik Nedergaard Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityGustav Wieds Vej 14Aarhus8000Denmark
| | - Jacob Nedergaard Pedersen
- Department of Biological and Chemical EngineeringAarhus UniversityGustav Wieds Vej 10Aarhus8000Denmark
| | - Nykola C. Jones
- ISADepartment of Physics and AstronomyAarhus UniversityNy Munkegade 120Aarhus8000Denmark
| | | | - Steen Vang Petersen
- Department of BiomedicineAarhus UniversityWilhelm Meyers Allé 4Aarhus8000Denmark
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO)Aarhus UniversityGustav Wieds Vej 14Aarhus8000Denmark
| | - Adam Perriman
- School of Cellular and Molecular MedicineUniversity of BristolBS8 1TSBristolUK
| | - Renjun Gao
- Key Laboratory for Molecular Enzymology and EngineeringThe Ministry of EducationSchool of Life SciencesJilin UniversityNo. 2699, Qianjin StreetChangchun130012P. R. China
| | - Zheng Guo
- Department of Biological and Chemical EngineeringAarhus UniversityGustav Wieds Vej 10Aarhus8000Denmark
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5
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Mondal S, Alke B, de Castro AM, Ortiz-Albo P, Syed UT, Crespo JG, Brazinha C. Design of Enzyme Loaded W/O Emulsions by Direct Membrane Emulsification for CO 2 Capture. MEMBRANES 2022; 12:membranes12080797. [PMID: 36005712 PMCID: PMC9416194 DOI: 10.3390/membranes12080797] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/08/2022] [Accepted: 08/16/2022] [Indexed: 05/12/2023]
Abstract
Membrane-based gas separation is a promising unit operation in a low-carbon economy due to its simplicity, ease of operation, reduced energy consumption and portability. A methodology is proposed to immobilise enzymes in stable water-in-oil (W/O) emulsions produced by direct membrane emulsification systems and thereafter impregnated them in the pores of a membrane producing emulsion-based supported liquid membranes. The selected case-study was for biogas (CO2 and CH4) purification. Upon initial CO2 sorption studies, corn oil was chosen as a low-cost and non-toxic bulk phase (oil phase). The emulsions were prepared with Nadir® UP150 P flat-sheet polymeric membranes. The optimised emulsions consisted of 2% Tween 80 (w/w) in corn oil as the continuous phase and 0.5 g.L-1 carbonic anhydrase enzyme with 5% PEG 300 (w/w) in aqueous solution as the dispersed phase. These emulsions were impregnated onto a porous hydrophobic PVDF membrane to prepare a supported liquid membrane for gas separation. Lastly, gas permeability studies indicated that the permeability of CO2 increased by ~15% and that of CH4 decreased by ~60% when compared to the membrane without carbonic anhydrase. Thus, a proof-of-concept for enhancement of CO2 capture using emulsion-based supported liquid membrane was established.
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Affiliation(s)
- Suchintan Mondal
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Bhavna Alke
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Aline Machado de Castro
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Research and Development Center, PETROBRAS, Av. Horácio Macedo, 950. Ilha do Fundão, Rio de Janeiro 21941-915, Brazil
| | - Paloma Ortiz-Albo
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Usman Taqui Syed
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - João G. Crespo
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
| | - Carla Brazinha
- LAQV/Requimte, Department of Chemistry, NOVA School of Science and Technology, FCT NOVA, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal
- Correspondence:
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6
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Argudo PG, Spitzer L, Jerome F, Cramail H, Camacho L, Lecommandoux S. Design and Self-Assembly of Sugar-Based Amphiphiles: Spherical to Cylindrical Micelles. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2022; 38:7535-7544. [PMID: 35666568 DOI: 10.1021/acs.langmuir.2c00579] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Sugar-based amphiphiles are a relevant natural alternative to synthetic ones due to their biodegradable properties. An understanding of their structure-assembly relationship is needed to allow the concrete synthesis of suitable derivatives. Here, four different mannose-derivative surfactants are characterized by pendant drop, dynamic light scattering, small-angle X-ray scattering, cryotransmission electron microscopy, and molecular dynamics techniques in aqueous media. Measurements denote how the polysaccharide average degree of polymerization (DP¯) and the addition of a hydroxyl group to the hydrophobic tail, and thus the presence of a second hydrophilic moiety, affect their self-assembly. A variation in the DP¯ of the amphiphile has no effect in the critical micelle concentration in contrast to a change in the hydrophobic molecular region. Moreover, high-DP¯ amphiphiles self-assemble into spherical micelles irrespective of the hydroxyl group presence. Low-DP¯ amphiphiles with only one hydrophilic moiety form cylindrical micelles, while the addition of a hydroxyl group to the tail leads to a spherical shape.
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Affiliation(s)
- Pablo G Argudo
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, 16 Avenue Pey-Berland, 33600 Pessac, France
| | - Léa Spitzer
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, 16 Avenue Pey-Berland, 33600 Pessac, France
- Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS-Université Poitiers, ENSIP, 1 rue Marcel Doré, 86073 Poitiers, France
| | - François Jerome
- Institut de Chimie des Milieux et Matériaux de Poitiers, CNRS-Université Poitiers, ENSIP, 1 rue Marcel Doré, 86073 Poitiers, France
| | - Henri Cramail
- Univ. Bordeaux, CNRS, Bordeaux INP, LCPO, 16 Avenue Pey-Berland, 33600 Pessac, France
| | - Luis Camacho
- Departamento de Química Física y T. Aplicada, Instituto Universitario de Nanoquímica IUNAN, Facultad de Ciencias, Universidad de Córdoba (UCO), Campus de Rabanales, Ed. Marie Curie, 14071 Córdoba, Spain
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7
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Szatkowski L, Varikoti RA, Dima RI. Modeling the Mechanical Response of Microtubule Lattices to Pressure. J Phys Chem B 2021; 125:5009-5021. [PMID: 33970630 DOI: 10.1021/acs.jpcb.1c01770] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Microtubules, the largest and stiffest filaments of the cytoskeleton, have to be well adapted to the high levels of crowdedness in cells to perform their multitude of functions. Furthermore, fundamental processes that involve microtubules, such as the maintenance of the cellular shape and cellular motion, are known to be highly dependent on external pressure. In light of the importance of pressure for the functioning of microtubules, numerous studies interrogated the response of these cytoskeletal filaments to osmotic pressure, resulting from crowding by osmolytes, such as poly(ethylene glycol)/poly(ethylene oxide) (PEG/PEO) molecules, or to direct applied pressure. The interpretation of experiments is usually based on the assumptions that PEG molecules have unfavorable interactions with the microtubule lattices and that the behavior of microtubules under pressure can be described by using continuous models. We probed directly these two assumptions. First, we characterized the interaction between the main interfaces in a microtubule filament and PEG molecules of various sizes using a combination of docking and molecular dynamics simulations. Second, we studied the response of a microtubule filament to compression using a coarse-grained model that allows for the breaking of lattice interfaces. Our results show that medium length PEG molecules do not alter the energetics of the lateral interfaces in microtubules but rather target and can penetrate into the voids between tubulin monomers at these interfaces, which can lead to a rapid loss of lateral interfaces under pressure. Compression of a microtubule under conditions corresponding to high osmotic pressure results in the formation of the deformed phase found in experiments. Our simulations show that the breaking of lateral interfaces, rather than the buckling of the filament inferred from the continuous models, accounts for the deformation.
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Affiliation(s)
- Lukasz Szatkowski
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States.,Division of Science, Mathematics, and Engineering, University of South Carolina Sumter, Sumter, South Carolina 29150, United States
| | - Rohith Anand Varikoti
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
| | - Ruxandra I Dima
- Department of Chemistry, University of Cincinnati, Cincinnati, Ohio 45221, United States
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8
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Pagar AD, Patil MD, Flood DT, Yoo TH, Dawson PE, Yun H. Recent Advances in Biocatalysis with Chemical Modification and Expanded Amino Acid Alphabet. Chem Rev 2021; 121:6173-6245. [PMID: 33886302 DOI: 10.1021/acs.chemrev.0c01201] [Citation(s) in RCA: 41] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The two main strategies for enzyme engineering, directed evolution and rational design, have found widespread applications in improving the intrinsic activities of proteins. Although numerous advances have been achieved using these ground-breaking methods, the limited chemical diversity of the biopolymers, restricted to the 20 canonical amino acids, hampers creation of novel enzymes that Nature has never made thus far. To address this, much research has been devoted to expanding the protein sequence space via chemical modifications and/or incorporation of noncanonical amino acids (ncAAs). This review provides a balanced discussion and critical evaluation of the applications, recent advances, and technical breakthroughs in biocatalysis for three approaches: (i) chemical modification of cAAs, (ii) incorporation of ncAAs, and (iii) chemical modification of incorporated ncAAs. Furthermore, the applications of these approaches and the result on the functional properties and mechanistic study of the enzymes are extensively reviewed. We also discuss the design of artificial enzymes and directed evolution strategies for enzymes with ncAAs incorporated. Finally, we discuss the current challenges and future perspectives for biocatalysis using the expanded amino acid alphabet.
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Affiliation(s)
- Amol D Pagar
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Mahesh D Patil
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
| | - Dillon T Flood
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, 206 World cup-ro, Yeongtong-gu, Suwon 16499, Korea
| | - Philip E Dawson
- Department of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States
| | - Hyungdon Yun
- Department of Systems Biotechnology, Konkuk University, 120 Neungdong-ro, Gwangjin-gu, Seoul 05029, Korea
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9
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Behera S, Das S, Balasubramanian S. An atomistic view of solvent-free protein liquids: the case of Lipase A. Phys Chem Chem Phys 2021; 23:7302-7312. [PMID: 33876090 DOI: 10.1039/d0cp05964a] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Solvent-free enzymes hold the promise of being able to deliver higher activity at elevated temperatures by virtue of them being not limited by the boiling point of the solvent. They have been realized in the liquid phase through a polymer surfactant coating on the protein surface. However, a clear understanding of intermolecular interactions, structure, dynamics, and the behaviour of the minuscule amount of water present in the solvent-free protein liquid is essential to enhance the activity of these biofluids. Using atomistic molecular dynamics simulations, we demonstrate that the scaled spatial correlations between proteins in the hybrid liquid phase of Lipase A enzymes are comparable to the inter-particle correlations in a noble gas fluid. The hydrophilic region of the surfactants forms a coronal layer around each enzyme which percolates throughout the liquid, while the hydrophobic parts are present as disjointed clusters. Inter-surfactant interactions, determined to be attractive and in the range of -200 to -300 kcal mol-1, stabilize the liquid state. While the protein retains its native state conformational dynamics in the solvent-free form, the fluxionality of its side chains is much reduced; at 333 K, the latter is found to be equivalent to that of the enzyme in an aqueous solution at 249 K. Despite the sluggishness of the solvent-free enzyme, some water molecules exhibit high mobility and transit between enzymes primarily via the interspersed hydrophilic regions. These microscopic insights offer ideas to improve substrate diffusion in the liquid to enable the enhancement of catalytic activity.
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Affiliation(s)
- Sudarshan Behera
- Chemistry and Physics of Materials Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Bangalore 560064, India.
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10
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Atkins DL, Magana JR, Sproncken CCM, van Hest JCM, Voets IK. Single Enzyme Nanoparticles with Improved Biocatalytic Activity through Protein Entrapment in a Surfactant Shell. Biomacromolecules 2021; 22:1159-1166. [PMID: 33630590 PMCID: PMC7944482 DOI: 10.1021/acs.biomac.0c01663] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
![]()
A polymeric corona
consisting of an alkyl-glycolic acid ethoxylate
(CXEOY) surfactant
offers a promising approach toward endowing proteins with thermotropic
phase behavior and hyperthermal activity. Typically, preparation of
protein–surfactant biohybrids is performed via chemical modification of acidic residues followed by electrostatic
conjugation of an anionic surfactant to encapsulate single proteins.
While this procedure has been applied to a broad range of proteins,
modification of acidic residues may be detrimental to function for
specific enzymes. Herein, we report on the one-pot preparation of
biohybrids via covalent conjugation of surfactants
to accessible lysine residues. We entrap the model enzyme hen egg-white
lysozyme (HEWL) in a shell of carboxyl-functionalized C12EO10 or C12EO22 surfactants. With
fewer surfactants, our covalent biohybrids display similar thermotropic
phase behavior to their electrostatically conjugated analogues. Through
a combination of small-angle X-ray scattering and circular dichroism
spectroscopy, we find that both classes of biohybrids consist of a
folded single-protein core decorated by surfactants. Whilst traditional
biohybrids retain densely packed surfactant coronas, our biohybrids
display a less dense and heterogeneously distributed surfactant coverage
located opposite to the catalytic cleft of HEWL. In solution, this
surfactant coating permits 7- or 3.5-fold improvements in activity
retention for biohybrids containing C12EO10 or
C12EO22, respectively. The reported alternative
pathway for biohybrid preparation offers a new horizon to expand upon
the library of proteins for which functional biohybrid materials can
be prepared. We also expect that an improved understanding of the
distribution of tethered surfactants in the corona will be crucial
for future structure–function investigations.
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Affiliation(s)
- Dylan L Atkins
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - J Rodrigo Magana
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Christian C M Sproncken
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Jan C M van Hest
- Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Laboratory of Bio-Organic Chemistry, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Ilja K Voets
- Laboratory of Self-Organizing Soft Matter, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands.,Institute for Complex Molecular Systems, Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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11
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Zhang WH, Carter BM, Day GJ, Govan N, Jackson C, Perriman AW. Sequential Electrostatic Assembly of a Polymer Surfactant Corona Increases Activity of the Phosphotriesterase arPTE. Bioconjug Chem 2019; 30:2771-2776. [PMID: 31603664 DOI: 10.1021/acs.bioconjchem.9b00664] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
We present a new methodology for the generation of discrete molecularly dispersed enzyme-polymer-surfactant bioconjugates. Significantly, we demonstrate that >3-fold increase in the catalytic efficiency of the diffusion-limited phosphotriesterase arPTE can be achieved through sequential electrostatic addition of cationic and anionic polymer surfactants, respectively. Here, the polymer surfactants assemble on the surface of the enzyme via ion exchange to yield a compact corona. The observed rate enhancement is consistent with a mechanism whereby the polymer-surfactant corona gives rise to a decrease in the dielectric constant in the vicinity of the active site of the enzyme, accelerating the rate-determining product diffusion step. The facile methodology has significant potential for increasing the efficiency of enzymes and could therefore have a substantially positive impact for industrial enzymology.
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Affiliation(s)
- William H Zhang
- University of Bristol , School of Cellular and Molecular Medicine , Bristol BS8 1TD , United Kingdom
| | - Benjamin M Carter
- University of Bristol , School of Cellular and Molecular Medicine , Bristol BS8 1TD , United Kingdom
| | - Graham J Day
- University of Bristol , School of Cellular and Molecular Medicine , Bristol BS8 1TD , United Kingdom
| | - Norman Govan
- Defence Science and Technology Laboratory , Salisbury SP4 0JQ , United Kingdom
| | - Colin Jackson
- Australian National University , Research School of Chemistry , Canberra ACT 2601 , Australia
| | - Adam W Perriman
- University of Bristol , School of Cellular and Molecular Medicine , Bristol BS8 1TD , United Kingdom
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12
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Zhou Y, Jones NC, Nedergaard Pedersen J, Pérez B, Vrønning Hoffmann S, Vang Petersen S, Skov Pedersen J, Perriman A, Kristensen P, Gao R, Guo Z. Insight into the Structure and Activity of Surface-Engineered Lipase Biofluids. Chembiochem 2019; 20:1266-1272. [PMID: 30624001 DOI: 10.1002/cbic.201800819] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2018] [Indexed: 11/07/2022]
Abstract
Despite a successful application of solvent-free liquid protein (biofluids) concept to a number of commercial enzymes, the technical advantages of enzyme biofluids as hyperthermal stable biocatalysts cannot be fully utilized as up to 90-99% of native activities are lost when enzymes were made into biofluids. With a two-step strategy (site-directed mutagenesis and synthesis of variant biofluids) on Bacillus subtilis lipase A (BsLA), we elucidated a strong dependency of structure and activity on the number and distribution of polymer surfactant binding sites on BsLA surface. Here, it is demonstrated that improved BsLA variants can be engineered via site-mutagenesis by a rational design, either with enhanced activity in aqueous solution in native form, or with improved physical property and increased activity in solvent-free system in the form of a protein liquid. This work answered some fundamental questions about the surface characteristics for construction of biofluids, useful for identifying new strategies for developing advantageous biocatalysts.
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Affiliation(s)
- Ye Zhou
- Key Laboratory for Molecular Enzymology and Engineering, Ministry of Education, School of Life Sciences, Jilin University, No. 2699, Qianjin Street, Changchun, 130012, China
- Department of Engineering, Aarhus University, Gustav Wieds Vej 10, Aarhus, 8000, Denmark
| | - Nykola C Jones
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus, 8000, Denmark
| | - Jannik Nedergaard Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Bianca Pérez
- Eknologisk institut, Kongsvang Allé 29, Aarhus, 8000, Denmark
| | - Søren Vrønning Hoffmann
- ISA, Department of Physics and Astronomy, Aarhus University, Ny Munkegade 120, Aarhus, 8000, Denmark
| | - Steen Vang Petersen
- Department of Biomedicine, Aarhus University, Wilhelm Meyers Allé 4, Aarhus, 8000, Denmark
| | - Jan Skov Pedersen
- Department of Chemistry and Interdisciplinary Nanoscience Center (iNANO), Aarhus University, Gustav Wieds Vej 14, Aarhus, 8000, Denmark
| | - Adam Perriman
- School of Cellular and Molecular Medicine, University of Bristol, University Walk, Bristol, BS8 1TS, UK
| | - Peter Kristensen
- Department of Chemistry and Bioscience, Aalborg University, Frederik Bayers Vej 7H, Aalborg, 9220, Denmark
| | - Renjun Gao
- Key Laboratory for Molecular Enzymology and Engineering, Ministry of Education, School of Life Sciences, Jilin University, No. 2699, Qianjin Street, Changchun, 130012, China
| | - Zheng Guo
- Department of Engineering, Aarhus University, Gustav Wieds Vej 10, Aarhus, 8000, Denmark
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