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Li Y, Dautel DR, Gray MA, McKenna ME, Champion JA. Rational design of elastin-like polypeptide fusion proteins to tune self-assembly and properties of protein vesicles. J Mater Chem B 2023. [PMID: 37357544 DOI: 10.1039/d3tb00200d] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Protein vesicles made from bioactive proteins have potential value in drug delivery, biocatalysis, and as artificial cells. As the proteins are produced recombinantly, the ability to precisely tune the protein sequence provides control not possible with polymeric vesicles. The tunability and biocompatibility motivated this work to develop protein vesicles using rationally designed protein building blocks to investigate how protein sequence influences vesicle self-assembly and properties. We have reported an elastin-like polypeptide (ELP) fused to an arginine-rich leucine zipper (ZR) and functional, globular proteins fused to a glutamate-rich leucine zipper (ZE) that self-assemble into protein vesicles when warmed from 4 to 25 °C due to the hydrophobic transition of ELP. Previously, we demonstrated the ability to tune vesicle properties by changing protein and salt concentration, ZE : ZR ratio, and warming rate. However, there is a limit to the properties that can be achieved via assembly conditions. In order to access a wider range of vesicle diameter and stability profiles, this work investigated how modifiying the hydrophobicity and length of the ELP sequence influenced self-assembly and the final properties of protein vesicles using mCherry as a model globular protein. The results showed that both transition temperature and diameter of protein vesicles were inversely correlated to the ELP guest residue hydrophobicity and the number of ELP pentapeptide repeats. Additionally, sequence manipulation enabled assembly of vesicles with properties not accessible by changes to assembly conditions. For example, introduction of tyrosine at 5 guest residue positions in ELP enabled formation of nanoscale vesicles stable at physiological salt concentration. This work yields design guidelines for modifying the ELP sequence to manipulate protein vesicle transition temperature, size and stability to achieve desired properties for particular biofunctional applications.
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Affiliation(s)
- Yirui Li
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
- BioEngineering Program, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA
| | - Dylan R Dautel
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
| | - Mikaela A Gray
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
| | - Michael E McKenna
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
| | - Julie A Champion
- School of Chemical and Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA.
- BioEngineering Program, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia, 30332, USA
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2
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Green synthesis of silica-coated magnetic nanocarriers for simultaneous purification-immobilization of β-1,3-xylanase. Int J Biol Macromol 2023; 233:123223. [PMID: 36639070 DOI: 10.1016/j.ijbiomac.2023.123223] [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: 07/11/2022] [Revised: 01/04/2023] [Accepted: 01/07/2023] [Indexed: 01/12/2023]
Abstract
Tailoring magnetic nanocarriers with tunable properties is of great significance for the development of multifunctional candidate materials in numerous fields. Herein, we report a one-pot biomimetic silicification-based method for the synthesis of silica-coated magnetic nanoparticles. The synthesis process was mild, low cost, and highly efficient, which took only about 21 min compared with 4.5-120 h in other literature. Then, the carriers had been characterized by VSM, SEM, TEM, XRD, FT-IR, and EDS to confirm their function. To evaluate the usefulness of the carriers, they were adopted to couple the purification and immobilization of β-1,3-xylanase from the cell lysate in a single step with high immobilization yield (92.8 %) and high activity recovery (82.4 %). The immobilized enzyme also retained 58.4 % of the initial activity after 10 cycles and displayed good storage properties, and improved thermal stability, which would be promising in algae biomass bioconversion as well as other diverse applications.
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3
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Choi J, Heo T, Choi H, Choi S, Won J. Co‐assembly
behavior of oppositely charged thermoresponsive elastin‐like polypeptide block copolymers. J Appl Polym Sci 2022. [DOI: 10.1002/app.52906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jeong‐Wan Choi
- Department of Chemical Engineering Hongik University Seoul Republic of Korea
| | - Tae‐Young Heo
- Department of Chemical Engineering Hongik University Seoul Republic of Korea
| | - Heelak Choi
- Department of Chemical Engineering Hongik University Seoul Republic of Korea
| | - Soo‐Hyung Choi
- Department of Chemical Engineering Hongik University Seoul Republic of Korea
| | - Jong‐In Won
- Department of Chemical Engineering Hongik University Seoul Republic of Korea
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4
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Sarangthem V, Sharma H, Goel R, Ghose S, Park RW, Mohanty S, Chaudhuri TK, Dinda AK, Singh TD. Application of elastin-like polypeptide (ELP) containing extra-cellular matrix (ECM) binding ligands in regenerative medicine. Int J Biol Macromol 2022; 207:443-453. [PMID: 35276294 DOI: 10.1016/j.ijbiomac.2022.03.018] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Revised: 02/24/2022] [Accepted: 03/03/2022] [Indexed: 12/26/2022]
Abstract
Extracellular matrix (ECM) molecules play an important role in regulating molecular signaling associated with proliferation, migration, differentiation, and tissue repair. The identification of new kinds of ECM mimic biomaterials to recapitulate critical functions of biological systems are important for various applications in tissue engineering and regenerative medicine. The use of human elastin derived materials with controlled biological properties and other functionalities to improve their cell-response was proposed. Herein, we reported genetic encoded synthesis of ELP (elastin-like polypeptide) containing ECM domains like RGD (integrin binding ligand) and YIGSR (laminin-selective receptor binding ligand) to regulate cell behaviour in more complex ways, and also better model natural matrices. Thermal responsiveness of the ELPs and structural conformation were determined to confirm its phase transition behaviour. The fusion ELPs derivatives were analysed for mechanical involvement of growth mechanism, regenerative, and healing processes. The designed fusion ELPs promoted fast and strong attachment of fibroblast cells. The fusion ELP derivatives enhanced the migration of keratinocyte cells which of crucial for wound healing. Together it provides a profound matrix for endothelial cells and significantly enhanced tube formation of HUVEC cells. Thus, strategy of using cell adhesive ELP biopolymer emphasizing the role of bioactive ELPs as next generation skin substitutes for regenerative medicine.
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Affiliation(s)
- Vijaya Sarangthem
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India.
| | - Harshita Sharma
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Ridhima Goel
- Department of Medical Oncology Laboratory, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Sampa Ghose
- Department of Medical Oncology Laboratory, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Rang-Woon Park
- Department of Biochemistry and Cell Biology, Kyungpook National University, School of Medicine, Daegu 41944, Republic of Korea
| | - Sujata Mohanty
- Stem Cell Facility, DBT Centre of Excellence for Stem Cell Research, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Tapan Kumar Chaudhuri
- Kusuma School of Biological Sciences, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Amit Kumar Dinda
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India
| | - Thoudam Debraj Singh
- Department of Medical Oncology Laboratory, All India Institute of Medical Sciences, New Delhi 110029, India
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5
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Chang MP, Huang W, Mai DJ. Monomer‐scale design of functional protein polymers using consensus repeat sequences. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210506] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Marina P. Chang
- Department of Materials Science and Engineering Stanford University Stanford California USA
| | - Winnie Huang
- Department of Chemical Engineering Stanford University Stanford California USA
| | - Danielle J. Mai
- Department of Chemical Engineering Stanford University Stanford California USA
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6
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Choi JW, Choi SH, Won JI. Self-Assembly Behavior of Elastin-like Polypeptide Diblock Copolymers Containing a Charged Moiety. Biomacromolecules 2021; 22:2604-2613. [PMID: 34038105 DOI: 10.1021/acs.biomac.1c00322] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Elastin-like polypeptides (ELPs) are stimulus-responsive protein-based biopolymers, and some ELP block copolymers can assemble into spherical nanoparticles with thermosensitivity. In this study, two different ELP diblock copolymers, each composed of a hydrophobic and a charged moiety, were synthesized, and the dependence of their physical properties on pH, temperature, and salt concentration was investigated. A series of analyses revealed that hydrophobic core micelles could be generated in response to a change in their surroundings and that micelles did not self-aggregate, a phenomenon due to the repulsive forces between like-charged molecules on the surface. We also demonstrated that self-assembly behavior was closely dependent on the character of the charged amino acid and the specific anion in solution.
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Affiliation(s)
- Jeong-Wan Choi
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Soo-Hyung Choi
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
| | - Jong-In Won
- Department of Chemical Engineering, Hongik University, Seoul 04066, Republic of Korea
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da Costa A, Pereira AM, Sampaio P, Rodríguez-Cabello JC, Gomes AC, Casal M, Machado R. Protein-Based Films Functionalized with a Truncated Antimicrobial Peptide Sequence Display Broad Antimicrobial Activity. ACS Biomater Sci Eng 2021; 7:451-461. [PMID: 33492122 DOI: 10.1021/acsbiomaterials.0c01262] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The increasing bacterial resistance to antibiotics is driving strong demand for new antimicrobial biomaterials. This work describes the fabrication of free-standing films exhibiting antimicrobial properties by combining, in the same polypeptide chain, an elastin-like recombinamer comprising 200 repetitions of the pentamer VPAVG (A200) and an 18-amino-acid truncated variant of the antimicrobial peptide BMAP-28, termed BMAP-18. The fusion protein BMAP-18A200 was overexpressed and conveniently purified by a simplified and scalable nonchromatographic process. Free-standing films of BMAP-18A200 demonstrated to be stable without requiring cross-linking agents and displayed high antimicrobial activity against skin pathogens including Gram-negative and Gram-positive bacteria as well as unicellular and filamentous fungi. The antimicrobial activity of the films was mediated by direct contact of cells with the film surface, resulting in compromised structural integrity of microbial cells. Furthermore, the BMAP-18A200 films showed no cytotoxicity on normal human cell lines (skin fibroblasts and keratinocytes). All of these results highlight the potential of these biotechnological multifunctional polymers as new drug-free materials to prevent and treat microbial infections.
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Affiliation(s)
- André da Costa
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Ana M Pereira
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Paula Sampaio
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - José Carlos Rodríguez-Cabello
- Bioforge (Group for Advanced Materials and Nanobiotechnology), Centro I+D, Universidad de Valladolid, 47011 Valladolid, Spain.,Networking Research Centre on Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), E-47011 Valladolid, Spain
| | - Andreia C Gomes
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Margarida Casal
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | - Raul Machado
- CBMA (Centre of Molecular and Environmental Biology), Department of Biology, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal.,Institute of Science and Innovation for Bio-Sustainability (IB-S), University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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8
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Cai L, Chu Y, Liu X, Qiu Y, Ge Z, Zhang G. A novel all-in-one strategy for purification and immobilization of β-1,3-xylanase directly from cell lysate as active and recyclable nanobiocatalyst. Microb Cell Fact 2021; 20:37. [PMID: 33549102 PMCID: PMC7866670 DOI: 10.1186/s12934-021-01530-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Accepted: 01/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Exploring a simple and versatile technique for direct immobilization of target enzymes from cell lysate without prior purification is urgently needed. Thus, a novel all-in-one strategy for purification and immobilization of β-1,3-xylanase was proposed, the target enzymes were covalently immobilized on silica nanoparticles via elastin-like polypeptides (ELPs)-based biomimetic silicification and SpyTag/SpyCatcher spontaneous reaction. Thus, the functional carriers that did not require the time-consuming surface modification step were quickly and efficiently prepared. These carriers could specifically immobilize the SpyTag-fused target enzymes from the cell lysate without pre-purification. RESULTS The ELPs-SpyCatcher hardly leaked from the carriers (0.5%), and the immobilization yield of enzyme was up to 96%. Immobilized enzyme retained 85.6% of the initial activity and showed 88.6% of the activity recovery. Compared with free ones, the immobilized β-1,3-xylanase showed improved thermal stability, elevated storage stability and good pH tolerance. It also retained more than 70.6% of initial activity after 12 reaction cycles, demonstrating its excellent reusability. CONCLUSIONS The results clearly highlighted the effectiveness of the novel enzyme immobilization method proposed here due to the improvement of overall performance of immobilized enzyme in respect to free form for the hydrolysis of macromolecular substrates. Thus, it may have great potential in the conversion of algae biomass as well as other related fields.
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Affiliation(s)
- Lixi Cai
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China.,Faculty of Basic Medicine, Putian University, Putian, 351100, Fujian, China
| | - Yunmen Chu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China
| | - Xin Liu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China
| | - Yue Qiu
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China
| | - Zhongqi Ge
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China
| | - Guangya Zhang
- Department of Bioengineering and Biotechnology, Huaqiao University, Xiamen, 361021, Fujian, China.
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Choi H, Han SJ, Won JI. Thermal characteristics and cadmium binding behavior of EC-ELP fusion polypeptides. Enzyme Microb Technol 2020; 140:109628. [PMID: 32912688 DOI: 10.1016/j.enzmictec.2020.109628] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 06/17/2020] [Accepted: 06/25/2020] [Indexed: 01/07/2023]
Abstract
Elastin-like polypeptides (ELPs) are stimulus-responsive protein-based biopolymers that exhibit phase transition behavior. By joining them to synthetic phytochelatin (EC), EC-ELP fusion proteins with temperature sensitivity and metal-binding functionality were generated to remove heavy metal ions biologically. Three different EC domains (EC10, EC20, EC30) were incorporated into the ELP, and the EC-ELP fusion proteins were expressed in E. coli. Their thermal properties and metal binding abilities were then investigated according to the EC length. In addition, the feasibility of reusing EC-ELPs and the cadmium ion binding affinity of reused EC-ELPs were explored.
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Affiliation(s)
- Heelak Choi
- Department of Chemical Engineering, Hongik University, Seoul, South Korea
| | - Sung-Jin Han
- Department of Chemical Engineering, Hongik University, Seoul, South Korea
| | - Jong-In Won
- Department of Chemical Engineering, Hongik University, Seoul, South Korea.
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10
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Wang S, Lin R, Ren Y, Zhang T, Lu H, Wang L, Fan D. Non-chromatographic purification of thermostable endoglucanase from Thermotoga maritima by fusion with a hydrophobic elastin-like polypeptide. Protein Expr Purif 2020; 173:105634. [PMID: 32325232 DOI: 10.1016/j.pep.2020.105634] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2019] [Revised: 02/26/2020] [Accepted: 03/31/2020] [Indexed: 01/08/2023]
Abstract
Endoglucanase EG12B from Thermotoga maritima is a thermophilic cellulase that has great potential for industrial applications. Here, to enable the selective purification of EG12B in a simple and efficient manner, an elastin-like polypeptide (ELP), which acts as a thermally responsive polypeptide, was fused with EG12B to enable its inverse phase transition cycling (ITC). A small gene library comprising ELPs from ELP5 to ELP50 was constructed using recursive directional ligation by plasmid reconstruction. ELP50 was added to the C-terminus of EG12B as a fusion tag to obtain the expression vector pET28-EG12B-ELP50, which was transformed into Escherichia coli BL21 (DE3) to enable the expression of fusion protein via IPTG induction. Gray scanning analysis revealed that the EG12B-ELP50 expression level was up to about 35% of the total cellular proteins. After three rounds of ITC, 8.14 mg of EG12B-ELP50 was obtained from 500-mL lysogeny broth culture medium. The recovery rate and purification fold of EG12B-ELP50 purified by ITC reached 78.1% and 11.8, respectively. The cellulase activity assay showed that EG12B-ELP50 had a better thermostability, higher optimal temperature, and longer half-life than those of free EG12B. Overall, our results suggested that ELP50 could be used as a favorable fusion tag, providing a rapid, simple, and inexpensive strategy for non-chromatographic target-protein purification.
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Affiliation(s)
- Shanshan Wang
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China; Shaanxi Key Laboratory of Degradable Biomedical Materials, School of Chemical Engineering, Northwest University, Taibai North Road 229, Xi'an, 710069, China.
| | - Rui Lin
- Department of Gastroenterology and Hepatology, Tianjin Medical University, General Hospital, Tianjin, 300052, China
| | - Yanyan Ren
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China
| | - Tao Zhang
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China
| | - Hongzhao Lu
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China
| | - Ling Wang
- School of Biological Science and Engineering, Shaanxi University of Technology, Hanzhong, 723001, China
| | - Daidi Fan
- Shaanxi Key Laboratory of Degradable Biomedical Materials, School of Chemical Engineering, Northwest University, Taibai North Road 229, Xi'an, 710069, China.
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11
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Characterization of Thermo-sensitive ELP-liposome Complexes According to the Conjugation Manner. BIOTECHNOL BIOPROC E 2019. [DOI: 10.1007/s12257-019-0117-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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12
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Wang X, Ge H, Zhang D, Wu S, Zhang G. Oligomerization triggered by foldon: a simple method to enhance the catalytic efficiency of lichenase and xylanase. BMC Biotechnol 2017; 17:57. [PMID: 28673305 PMCID: PMC5496177 DOI: 10.1186/s12896-017-0380-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 06/28/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Effective and simple methods that lead to higher enzymatic efficiencies are highly sough. Here we proposed a foldon-triggered trimerization of the target enzymes with significantly improved catalytic performances by fusing a foldon domain at the C-terminus of the enzymes via elastin-like polypeptides (ELPs). The foldon domain comprises 27 residues and can forms trimers with high stability. RESULTS Lichenase and xylanase can hydrolyze lichenan and xylan to produce value added products and biofuels, and they have great potentials as biotechnological tools in various industrial applications. We took them as the examples and compared the kinetic parameters of the engineered trimeric enzymes to those of the monomeric and wild type ones. When compared with the monomeric ones, the catalytic efficiency (k cat /K m ) of the trimeric lichenase and xylanase increased 4.2- and 3.9- fold. The catalytic constant (k cat ) of the trimeric lichenase and xylanase increased 1.8- fold and 5.0- fold than their corresponding wild-type counterparts. Also, the specific activities of trimeric lichenase and xylanase increased by 149% and 94% than those of the monomeric ones. Besides, the recovery of the lichenase and xylanase activities increased by 12.4% and 6.1% during the purification process using ELPs as the non-chromatographic tag. The possible reason is the foldon domain can reduce the transition temperature of the ELPs. CONCLUSION The trimeric lichenase and xylanase induced by foldon have advantages in the catalytic performances. Besides, they were easier to purify with increased purification fold and decreased the loss of activities compared to their corresponding monomeric ones. Trimerizing of the target enzymes triggered by the foldon domain could improve their activities and facilitate the purification, which represents a simple and effective enzyme-engineering tool. It should have exciting potentials both in industrial and laboratory scales.
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Affiliation(s)
- Xinzhe Wang
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Huihua Ge
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Dandan Zhang
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Shuyu Wu
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, 361021, China
| | - Guangya Zhang
- Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, Fujian, 361021, China.
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Choi H, Chu HS, Chung M, Kim B, Won JI. Synthesis and characterization of an ELP-conjugated liposome with thermo-sensitivity for controlled release of a drug. BIOTECHNOL BIOPROC E 2016. [DOI: 10.1007/s12257-016-0391-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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14
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Jang Y, Champion JA. Self-Assembled Materials Made from Functional Recombinant Proteins. Acc Chem Res 2016; 49:2188-2198. [PMID: 27677734 DOI: 10.1021/acs.accounts.6b00337] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Proteins are potent molecules that can be used as therapeutics, sensors, and biocatalysts with many advantages over small-molecule counterparts due to the specificity of their activity based on their amino acid sequence and folded three-dimensional structure. However, they also have significant limitations in their stability, localization, and recovery when used in soluble form. These opportunities and challenges have motivated the creation of materials from such functional proteins in order to protect and present them in a way that enhances their function. We have designed functional recombinant fusion proteins capable of self-assembling into materials with unique structures that maintain or improve the functionality of the protein. Fusion of either a functional protein or an assembly domain to a leucine zipper domain makes the materials design strategy modular, based on the high affinity between leucine zippers. The self-assembly domains, including elastin-like polypeptides (ELPs) and defined-sequence random coil polypeptides, can be fused with a leucine zipper motif in order to promote assembly of the fusion proteins into larger structures upon specific stimuli such as temperature and ionic strength. Fusion of other functional domains with the counterpart leucine zipper motif endows the self-assembled materials with protein-specific functions such as fluorescence or catalytic activity. In this Account, we describe several examples of materials assembled from functional fusion proteins as well as the structural characterization, functionality, and understanding of the assembly mechanism. The first example is zipper fusion proteins containing ELPs that assemble into particles when introduced to a model extracellular matrix and subsequently disassemble over time to release the functional protein for drug delivery applications. Under different conditions, the same fusion proteins can self-assemble into hollow vesicles. The vesicles display a functional protein on the surface and can also carry protein, small-molecule, or nanoparticle cargo in the vesicle lumen. To create a material with a more complex hierarchical structure, we combined calcium phosphate with zipper fusion proteins containing random coil polypeptides to produce hybrid protein-inorganic supraparticles with high surface area and porous structure. The use of a functional enzyme created supraparticles with the ability to degrade inflammatory cytokines. Our characterization of these protein materials revealed that the molecular interactions are complex because of the large size of the protein building blocks, their folded structures, and the number of potential interactions including hydrophobic interactions, electrostatic interactions, van der Waals forces, and specific affinity-based interactions. It is difficult or even impossible to predict the structures a priori. However, once the basic assembly principles are understood, there is opportunity to tune the material properties, such as size, through control of the self-assembly conditions. Our future efforts on the fundamental side will focus on identifying the phase space of self-assembly of these fusion proteins and additional experimental levers with which to control and tune the resulting materials. On the application side, we are investigating an array of different functional proteins to expand the use of these structures in both therapeutic protein delivery and biocatalysis.
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Affiliation(s)
- Yeongseon Jang
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia 30332, United States
| | - Julie A. Champion
- School of Chemical & Biomolecular Engineering, Georgia Institute of Technology, 950 Atlantic Drive NW, Atlanta, Georgia 30332, United States
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15
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Seo KH, Chu HS, Yoo TH, Lee SG, Won JI. Separation efficiency of free-solution conjugated electrophoresis with drag-tags incorporating a synthetic amino acid. Electrophoresis 2016; 37:818-25. [PMID: 26757485 DOI: 10.1002/elps.201500506] [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: 11/04/2015] [Revised: 12/22/2015] [Accepted: 12/29/2015] [Indexed: 11/10/2022]
Abstract
DNA sequencing or separation by conventional capillary electrophoresis with a polymer matrix has some inherent drawbacks, such as the expense of polymer matrix and limitations in sequencing read length. As DNA fragments have a linear charge-to-friction ratio in free solution, DNA fragments cannot be separated by size. However, size-based separation of DNA is possible in free-solution conjugate electrophoresis (FSCE) if a "drag-tag" is attached to DNA fragments because the tag breaks the linear charge-to-friction scaling. Although several previous studies have demonstrated the feasibility of DNA separation by free-solution conjugated electrophoresis, generation of a monodisperse drag-tag and identification of a strong, site-specific conjugation method between a DNA fragment and a drag-tag are challenges that still remain. In this study, we demonstrate an efficient FSCE method by conjugating a biologically synthesized elastin-like polypeptide (ELP) and green fluorescent protein (GFP) to DNA fragments. In addition, to produce strong and site-specific conjugation, a methionine residue in drag-tags is replaced with homopropargylglycine (Hpg), which can be conjugated specifically to a DNA fragment with an azide site.
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Affiliation(s)
- Kyung-Ho Seo
- Department of Chemical Engineering, Hongik University, Seoul, Korea
| | - Hun-Su Chu
- Department of Chemical Engineering, Hongik University, Seoul, Korea.,Material Research Center, SAMSUNG ELECTRONICS Co, Suwon, Korea
| | - Tae Hyeon Yoo
- Department of Molecular Science and Technology, Ajou University, Suwon, Korea
| | - Sun-Gu Lee
- Department of Chemical Engineering, Pusan National University, Pusan, Korea
| | - Jong-In Won
- Department of Chemical Engineering, Hongik University, Seoul, Korea
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Catherine C, Oh SJ, Lee KH, Min SE, Won JI, Yun H, Kim DM. Engineering thermal properties of elastin-like polypeptides by incorporation of unnatural amino acids in a cell-free protein synthesis system. BIOTECHNOL BIOPROC E 2015. [DOI: 10.1007/s12257-015-0190-1] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Wang Q, Xia X, Huang W, Lin Y, Xu Q, Kaplan DL. High Throughput Screening of Dynamic Silk-Elastin-Like Protein Biomaterials. ADVANCED FUNCTIONAL MATERIALS 2014; 24:4303-4310. [PMID: 25505375 PMCID: PMC4258412 DOI: 10.1002/adfm.201304106] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The need for dynamic, elastomeric polymeric biomaterials remains high, with few options with tunable control of mechanical properties, and environmental responses. Yet the diversity of these types of protein polymers pursued for biomaterials-related needs remains limited. Robust high-throughput synthesis and characterization methods will address the need to expand options for protein-polymers for a range of applications. To address this need, a combinatorial library approach with high throughput screening is used to select specific examples of dynamic protein silk-elastin-like polypeptides (SELPs) with unique stimuli responsive features, including tensile strength, and adhesion. Using this approach 64 different SELPs with different sequences and molecular weights are selected out of over 2,000 recombinant E. coli colonies. New understanding of sequence-function relationships with this family of proteins is gained through this combinatorial-screening approach and can provide a guide to future library designs. Further, this approach yields new families of SELPs to match specific material functions.
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Affiliation(s)
- Qin Wang
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts, 02155, United States
| | - Xiaoxia Xia
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dong-Chuan Road, Shanghai, 200240, China
| | - Wenwen Huang
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts, 02155, United States
| | - Yinan Lin
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts, 02155, United States
| | - Qiaobing Xu
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts, 02155, United States
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts, 02155, United States
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Chu HS, Ryum J, Won JI. Cadmium detection by a thermally responsive elastin copolymer with metal-binding functionality. Enzyme Microb Technol 2013; 53:189-93. [PMID: 23830461 DOI: 10.1016/j.enzmictec.2013.03.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/06/2013] [Accepted: 03/28/2013] [Indexed: 11/27/2022]
Abstract
Heavy metals are of great concern to environmental safety because of their adverse effects on the environment and human health, even at very low levels. In particular, cadmium and several cadmium-containing compounds are carcinogens and induce many types of cancer. Biological extracts of cadmium have been given greater attention recently because they are considered to be environmentally benign and economically acceptable. Among promising candidates, one emerging technology is the use of tunable, metal-binding biopolymers based on elastin-like polypeptides (ELPs). An ELP consists of the repeating pentapeptide of specific amino acids, Val-Pro-Gly-Xaa-Gly (where the "guest residue" Xaa is any amino except proline) that undergoes a reversible phase transition at a specific temperature (transition temperature, Tt). However, the ELP itself is relatively non-selective. A biopolymer with metal-binding domains that have stronger affinity, capacity, and selectivity would have distinct advantages. We investigated the use of a new generation of ELP biopolymers, EC18-ELP containing synthetic phytochelatin (EC), which is a metal-binding protein with a repetitive motif (Glu-Cys)nGly, as the metal-binding domain. In this study, an EC18-ELP fusion protein was expressed in Escherichia coli and the metal binding ability of EC to cadmium was examined quantitatively. In addition, transition temperature variation was analyzed when the fusion protein bound to cadmium.
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Affiliation(s)
- Hun Su Chu
- Department of Chemical Engineering, Hongik University, Mapo-gu, Seoul 121-791, Republic of Korea
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Lee EY, Kim AL, Lee OK, Choi SH. Development of a marine epoxide hydrolase biocatalyst tagged with elastin-like polypeptides for preparation of chiral epoxides. N Biotechnol 2012. [DOI: 10.1016/j.nbt.2012.08.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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