1
|
Morris MA, Mills CE, Paloni JM, Miller EA, Sikes HD, Olsen BD. High-Throughput Screening of Streptavidin-Binding Proteins in Self-Assembled Solid Films for Directed Evolution of Materials. NANO LETTERS 2023; 23:7303-7310. [PMID: 37566825 DOI: 10.1021/acs.nanolett.3c01229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/13/2023]
Abstract
Evolution has shaped the development of proteins with an incredible diversity of properties. Incorporating proteins into materials is desirable for applications including biosensing; however, high-throughput selection techniques for screening protein libraries in materials contexts is lacking. In this work, a high-throughput platform to assess the binding affinity for ordered sensing proteins was established. A library of fusion proteins, consisting of an elastin-like polypeptide block, one of 22 variants of rcSso7d, and a coiled-coil order-directing sequence, was generated. All selected variants had high binding in films, likely due to the similarity of the assay to magnetic bead sorting used for initial selection, while solution binding was more variable. From these results, both the assembly of the fusion proteins in their operating state and the functionality of the binding protein are key factors in the biosensing performance. Thus, the integration of directed evolution with assembled systems is necessary to the design of better materials.
Collapse
Affiliation(s)
- Melody A Morris
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Carolyn E Mills
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Justin M Paloni
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Eric A Miller
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Hadley D Sikes
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| | - Bradley D Olsen
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States
| |
Collapse
|
2
|
An engineered three-in-one hybrid nanosystem from elastin-like polypeptides for enhanced cancer suppression. Colloids Surf B Biointerfaces 2022. [DOI: 10.1016/j.colsurfb.2022.112976] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Thermoresponsive Polymer Assemblies: From Molecular Design to Theranostics Application. Prog Polym Sci 2022. [DOI: 10.1016/j.progpolymsci.2022.101578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
4
|
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
| |
Collapse
|
5
|
Navarro LA, Ryan JJ, Dzuricky M, Gradzielski M, Chilkoti A, Zauscher S. Microphase Separation of Resilin-like and Elastin-like Diblock Copolypeptides in Concentrated Solutions. Biomacromolecules 2021; 22:3827-3838. [PMID: 34387460 PMCID: PMC9911169 DOI: 10.1021/acs.biomac.1c00672] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Diblock copolymers are valued for their ability to form thin films with nanoscale features that typically reflect those of their microphase-separated structures in concentrated solution. Here, we show that such self-assembled structures can be easily formed with diblock copolymers composed of thermally responsive polypeptides, such as resilin-like polypeptides (RLP) and elastin-like polypeptides (ELP), by exploiting the inverse temperature transition behavior of ELPs in aqueous media. Specifically, we examine the self-assembly of a series of RLP-b-ELP diblock copolypeptides in concentrated aqueous solution (30 and 50 wt %) by small-angle X-ray scattering (SAXS). By systematically varying RLP block length and temperature (10-45 °C), we observed microphase separation into hexagonally packed cylinders and lamellae. By analyzing the observed order-order transitions (OOT) and order-disorder transitions (ODT), we determined that self-assembly in this system is primarily driven by polymer-solvent interactions. While these thermally responsive polymers showed clear ODTs and OOTs at certain temperatures, temperature only had a weak effect on the spacing of the resulting nanostructures. In contrast, we found that nanostructure spacing was far more sensitive to RLP block length. Finally, we used atomic force microscopy (AFM) to demonstrate that spin casting RLP-b-ELP diblock copolypeptides also produce nanostructured thin films with spacings that correlate with those in concentrated solution.
Collapse
Affiliation(s)
| | | | - Michael Dzuricky
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States
| | | | - Ashutosh Chilkoti
- Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States
| | - Stefan Zauscher
- Department of Mechanical Engineering & Materials Science, Duke University, Durham, North Carolina 27708, United States; Department of Biomedical Engineering, Duke University, Durham, North Carolina 27708, United States
| |
Collapse
|
6
|
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.
Collapse
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
| |
Collapse
|
7
|
Song WW, Qian ZG, Liu H, Chen HF, Kaplan DL, Xia XX. On-Demand Regulation of Dual Thermosensitive Protein Hydrogels. ACS Macro Lett 2021; 10:395-400. [PMID: 35549223 DOI: 10.1021/acsmacrolett.1c00062] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Despite considerable progress having been made in thermosensitive protein hydrogels, regulating their thermal transitions remains a challenge due to the intricate molecular structures and interactions of the underlying protein polymers. Here we report a genetic fusion strategy to tune the unique dual thermal transitions of the C-terminal domain (CTD) of spider major ampullate spidroin 1, and explore the regulation mechanism by biophysical characterization and molecular dynamics simulations. We found that the fusion of elastin-like polypeptides (ELPs) tuned the dual transition temperatures of CTD to a physiologically relevant window, by introducing extra hydrogen bonding at low temperatures and hydrophobic interactions at high temperatures. The resulting hydrogels constructed from the fusion proteins were demonstrated to be a promising vehicle for cell preservation and delivery. This study provides insights on the regulation of the dual thermosensitive protein hydrogels and suggests a potential application of the hydrogels for consolidated cell storage and delivery.
Collapse
Affiliation(s)
- Wen-Wen Song
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Zhi-Gang Qian
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Hao Liu
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - Hai-Feng Chen
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| | - David L. Kaplan
- Department of Biomedical Engineering, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Xiao-Xia Xia
- State Key Laboratory of Microbial Metabolism, Joint International Research Laboratory of Metabolic and Developmental Sciences, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
| |
Collapse
|
8
|
Bhandari PJ, Sandanaraj BS. Programmed and Sequential Disassembly of Multi-responsive Supramolecular Protein Nanoassemblies: A Detailed Mechanistic Investigation. Chembiochem 2020; 22:876-887. [PMID: 33073455 DOI: 10.1002/cbic.202000581] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Revised: 10/18/2020] [Indexed: 12/19/2022]
Abstract
The rational design of a multi-responsive protein-based supramolecular system that can predictably respond to more than one stimulus remains an essential but highly challenging goal in biomolecular engineering. Herein, we report a novel chemical method for the construction of multi-responsive supramolecular nanoassemblies using custom-designed facially amphiphilic monodisperse protein-dendron bioconjugates. The macromolecular synthons contain a globular hydrophilic protein domain site-specifically conjugated to photo-responsive hydrophobic benzyl-ether dendrons of different generations through oligo(ethylene glycol) linkers of defined length. The size of the protein nanoassemblies can be systematically tuned by choosing an appropriate dendron or linker of defined length. Exposure of protein nanoassemblies to light results in partial rather than complete disassembly of the complex. The newly formed protein nanoparticle no longer responds to light but could be disassembled into constitutive monomers under acidic conditions or by further treatment with a small molecule. More interestingly, the distribution ratio of the assembled versus disassembled states of protein nanoassemblies after photochemical reaction does not depend on dendron generation, the nature of the linker functionality or the identity of the protein, but is heavily influenced by the linker length. In sum, this work discloses a new chemical method for the rational design of a monodisperse multi-responsive protein-based supramolecular system with exquisite control over the disassembly process.
Collapse
Affiliation(s)
- Pavankumar Janardhan Bhandari
- Department of Chemistry, Indian Institute of Science Education and Research, 100 Homi Bhabha Road, Pune, 411008, India
| | - Britto S Sandanaraj
- Department of Chemistry, Indian Institute of Science Education and Research, 100 Homi Bhabha Road, Pune, 411008, India.,Department of Biology, Indian Institute of Science Education and Research, 100 Homi Bhabha Road, Pune, 411008, India
| |
Collapse
|
9
|
Yao H, Sheng K, Sun J, Yan S, Hou Y, Lu H, Olsen BD. Secondary structure drives self-assembly in weakly segregated globular protein–rod block copolymers. Polym Chem 2020. [DOI: 10.1039/c9py01680e] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Imparting secondary structure to the polymer block can drive self-assembly in globular protein–helix block copolymers, increasing the effective segregation strength between blocks with weak or no repulsion.
Collapse
Affiliation(s)
- Helen Yao
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| | - Kai Sheng
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Jialing Sun
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Shupeng Yan
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Yingqin Hou
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Hua Lu
- College of Chemistry and Molecular Engineering
- Peking University
- Beijing 100871
- P. R. China
| | - Bradley D. Olsen
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| |
Collapse
|
10
|
Hossain MS, Liu X, Maynard TI, Mozhdehi D. Genetically Encoded Inverse Bolaamphiphiles. Biomacromolecules 2019; 21:660-669. [DOI: 10.1021/acs.biomac.9b01380] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Md Shahadat Hossain
- Department of Chemistry, 1-014 Center for Science and Technology, 111 College Place, Syracuse University, Syracuse, New York 13244, United States
| | - Xin Liu
- Department of Chemistry, 1-014 Center for Science and Technology, 111 College Place, Syracuse University, Syracuse, New York 13244, United States
| | - Timothy I. Maynard
- Department of Chemistry, 1-014 Center for Science and Technology, 111 College Place, Syracuse University, Syracuse, New York 13244, United States
| | - Davoud Mozhdehi
- Department of Chemistry, 1-014 Center for Science and Technology, 111 College Place, Syracuse University, Syracuse, New York 13244, United States
| |
Collapse
|
11
|
Lin CY, Liu JC. Incorporation of short, charged peptide tags affects the temperature responsiveness of positively-charged elastin-like polypeptides. J Mater Chem B 2019; 7:5245-5256. [PMID: 31384872 PMCID: PMC7098454 DOI: 10.1039/c9tb00821g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Elastin-like polypeptides (ELPs) are recombinant protein domains exhibiting lower critical solution temperature (LCST) behavior. This LCST behavior is controlled not only by intrinsic factors including amino acid composition and polypeptide chain length but also by non-ELP fusion domains. Here, we report that the presence of a composite non-ELP sequence that includes both His and T7 tags or a short Ser-Lys-Gly-Pro-Gly (SKGPG) sequence can dramatically change the LCST behavior of a positively-charged ELP domain. Both the His and T7 tags have been widely used in recombinant protein design to enable affinity chromatography and serve as epitopes for protein detection. The SKGPG sequence has been used to improve the expression of ELPs. Both the composite tag and the SKGPG sequence are <15% of the total length of the ELP fusion proteins. Despite the small size of the composite tag, its incorporation imparted pH-sensitive LCST behavior to the positively-charged ELP fusion protein. This pH sensitivity was not observed with the incorporation of the SKGPG sequence. The pH sensitivity results from both electrostatic and hydrophobic interactions between the composite tag and the positively-charged ELP domain. The hydrophobicity of the composite tag also alters the ELP interaction with Hofmeister salts by changing the overall hydrophobicity of the fusion protein. Our results suggest that incorporation of short tag sequences should be considered when designing temperature-responsive ELPs and provide insights into utilizing both electrostatic and hydrophobic interactions to design temperature-responsive recombinant proteins as well as synthetic polymers.
Collapse
Affiliation(s)
- Charng-Yu Lin
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA.
| | - Julie C Liu
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907, USA. and Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907, USA
| |
Collapse
|
12
|
Jung SH, Lee JY, Lee SH, Kwon MH, Han ET, Park WS, Hong SH, Kim YM, Ha KS. Preventive Effects of Thermosensitive Biopolymer-Conjugated C-Peptide against High Glucose-Induced Endothelial Cell Dysfunction. Macromol Biosci 2019; 19:e1900129. [PMID: 31310433 DOI: 10.1002/mabi.201900129] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2019] [Revised: 05/31/2019] [Indexed: 11/08/2022]
Abstract
C-peptide has emerged as a potential drug for treating diabetic complications. However, clinical application of C-peptide is limited by its short half-life during circulation and costly synthesis methods. To overcome these limitations, a biocompatible and thermosensitive biopolymer-C-peptide conjugate composed of human C-peptide genetically conjugated at the C-terminus of nine repeats of lysine-containing elastin-like polypeptide (K9-C-peptide) is generated. K9-C-peptide exhibits reversible thermal phase behavior with a transition temperature dependent on polypeptide concentration. Degradation of K9-C-peptide hydrogel depends on the concentration of four cleavage enzymes as well as the reaction time and frequency of treatments with elastase-2. The preventive effect of K9-C-peptide against high glucose-induced human aortic endothelial cell dysfunction is further investigated. K9-C-peptide inhibits high glucose-induced intracellular reactive oxygen species generation, transglutaminase 2 activation, and apoptosis, similar to the inhibitory effects of human C-peptide. Thus, K9-C-peptide is a potential drug depot for the sustained delivery of C-peptide to treat diabetic complications.
Collapse
Affiliation(s)
- Se-Hui Jung
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Jee-Yeon Lee
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Seong-Hyeon Lee
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Mi-Hye Kwon
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Eun-Taek Han
- Department of Medical Environmental Biology and Tropical Medicine, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Won Sun Park
- Department of Physiology, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Seok-Ho Hong
- Department of Internal Medicine, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Young-Myeong Kim
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| | - Kwon-Soo Ha
- Department of Molecular and Cellular Biochemistry, Kangwon National University School of Medicine, Chuncheon, Kangwon-Do, 200-701, Korea
| |
Collapse
|
13
|
Ibáñez-Fonseca A, Flora T, Acosta S, Rodríguez-Cabello JC. Trends in the design and use of elastin-like recombinamers as biomaterials. Matrix Biol 2019; 84:111-126. [PMID: 31288085 DOI: 10.1016/j.matbio.2019.07.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2019] [Revised: 06/23/2019] [Accepted: 07/05/2019] [Indexed: 12/16/2022]
Abstract
Elastin-like recombinamers (ELRs), which derive from one of the repetitive domains found in natural elastin, have been intensively studied in the last few years from several points of view. In this mini review, we discuss all the recent works related to the investigation of ELRs, starting with those that define these polypeptides as model intrinsically disordered proteins or regions (IDPs or IDRs) and its relevance for some biomedical applications. Furthermore, we summarize the current knowledge on the development of drug, vaccine and gene delivery systems based on ELRs, while also emphasizing the use of ELR-based hydrogels in tissue engineering and regenerative medicine (TERM). Finally, we show different studies that explore applications in other fields, and several examples that describe biomaterial blends in which ELRs have a key role. This review aims to give an overview of the recent advances regarding ELRs and to encourage further investigation of their properties and applications.
Collapse
Affiliation(s)
- Arturo Ibáñez-Fonseca
- BIOFORGE Lab, CIBER-BBN, University of Valladolid, Paseo de Belén 19, 47011 Valladolid, Spain
| | - Tatjana Flora
- BIOFORGE Lab, CIBER-BBN, University of Valladolid, Paseo de Belén 19, 47011 Valladolid, Spain
| | - Sergio Acosta
- BIOFORGE Lab, CIBER-BBN, University of Valladolid, Paseo de Belén 19, 47011 Valladolid, Spain
| | | |
Collapse
|
14
|
Abstract
Bioconjugates made of the model red fluorescent protein mCherry and synthetic polymer blocks show that topology, i.e. the BA, BA2, ABA and ABC chain structure of the block copolymers, where B represents the protein and A and C represent polymers, has a significant effect on ordering transitions and the type and size of nanostructures formed during microphase separation.
Collapse
Affiliation(s)
- Takuya Suguri
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
- Yokkaichi Research Center
| | - Bradley D. Olsen
- Department of Chemical Engineering
- Massachusetts Institute of Technology
- Cambridge
- USA
| |
Collapse
|
15
|
Xu L, Zhang WB. The pursuit of precision in macromolecular science: Concepts, trends, and perspectives. POLYMER 2018. [DOI: 10.1016/j.polymer.2018.09.017] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
16
|
Mills CE, Michaud Z, Olsen BD. Elastin-like Polypeptide (ELP) Charge Influences Self-Assembly of ELP-mCherry Fusion Proteins. Biomacromolecules 2018; 19:2517-2525. [PMID: 29791150 DOI: 10.1021/acs.biomac.8b00147] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Self-assembly of protein-polymer bioconjugates presents an elegant strategy for controlling nanostructure and orientation of globular proteins in functional materials. Recent work has shown that genetic fusion of globular protein mCherry to an elastin-like polypeptide (ELP) yields similar self-assembly behavior to these protein-polymer bioconjugates. In the context of studying protein-polymer bioconjugate self-assembly, the mutability of the ELP sequence allows several different properties of the ELP block to be tuned orthogonally while maintaining consistent polypeptide backbone chemistry. This work uses this ELP sequence tunability in combination with the precise control offered by genetic engineering of an amino acid sequence to generate a library of four novel ELP sequences that are used to study the combined effect of charge and hydrophobicity on ELP-mCherry fusion protein self-assembly. Concentrated solution self-assembly is studied by small-angle X-ray scattering (SAXS) and depolarized light scattering (DPLS). These experiments show that fusions containing a negatively charged ELP block do not assemble at all, and fusions with a charge balanced ELP block exhibit a weak propensity for assembly. By comparison, the fusion containing an uncharged ELP block starts to order at 40 wt % in solution and at all concentrations measured has sharper, more intense SAXS peaks than other fusion proteins. These experiments show that charge character of the ELP block is a stronger predictor of self-assembly behavior than the hydrophobicity of the ELP block. Dilute solution small-angle neutron scattering (SANS) on the ELPs alone suggests that all ELPs used in this study (including the uncharged ELP) adopt dilute solution conformations similar to those of traditional polymers, including polyampholytes and polyelectrolytes. Finally, dynamic light scattering studies on ELP-mCherry blends shows that there is no significant complexation between the charged ELPs and mCherry. Therefore, it is proposed that the superior self-assembly of fusion proteins containing uncharged ELP block is due to effective repulsions between charged and uncharged blocks due to local charge correlation effects and, in the case of anionic ELPs, repulsion between like charges within the ELP block.
Collapse
Affiliation(s)
- Carolyn E Mills
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Zachary Michaud
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| | - Bradley D Olsen
- Department of Chemical Engineering , Massachusetts Institute of Technology , Cambridge , Massachusetts 02139 , United States
| |
Collapse
|
17
|
Gan Y, Wang ZD, Lu ZX, Shi Y, Tan HY, Yan CF. Control on the Morphology of ABA Amphiphilic Triblock Copolymer Micelles in Dioxane/Water Mixture Solvent. CHINESE JOURNAL OF POLYMER SCIENCE 2018. [DOI: 10.1007/s10118-018-2066-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
|
18
|
Isaacson KJ, Jensen MM, Watanabe AH, Green BE, Correa MA, Cappello J, Ghandehari H. Self-Assembly of Thermoresponsive Recombinant Silk-Elastinlike Nanogels. Macromol Biosci 2018; 18:10.1002/mabi.201700192. [PMID: 28869362 PMCID: PMC5806626 DOI: 10.1002/mabi.201700192] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 07/19/2017] [Indexed: 12/28/2022]
Abstract
Recombinant silk-elastinlike protein polymers (SELPs) combine the biocompatibility and thermoresponsiveness of human tropoelastin with the strength of silk. Direct control over structure of these monodisperse polymers allows for precise correlation of structure with function. This work describes the fabrication of the first SELP nanogels and evaluation of their physicochemical properties and thermoresponsiveness. Self-assembly of dilute concentrations of SELPs results in nanogels with enhanced stability over micelles due to physically crosslinked beta-sheet silk segments. The nanogels respond to thermal stimuli via size changes and aggregation. Modifying the ratio and sequence of silk to elastin in the polymer backbone results in alterations in critical gel formation concentration, stability, aggregation, size contraction temperature, and thermal reversibility. The nanogels sequester hydrophobic compounds and show promise in delivery of bioactive agents.
Collapse
Affiliation(s)
- Kyle J Isaacson
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
| | - Mark Martin Jensen
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
| | - Alexandre H Watanabe
- College of Pharmacy, University of Utah, 30 2000 E., Salt Lake City, UT, 84112, USA
| | - Bryant E Green
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
| | - Marcelo A Correa
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
| | - Joseph Cappello
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E., Salt Lake City, UT, 84112, USA
| | - Hamidreza Ghandehari
- Utah Center for Nanomedicine, Nano Institute of Utah, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Bioengineering, University of Utah, 36 S. Wasatch Dr., Salt Lake City, UT, 84112, USA
- Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, 30 S. 2000 E., Salt Lake City, UT, 84112, USA
| |
Collapse
|
19
|
Hollingshead S, Lin CY, Liu JC. Designing Smart Materials with Recombinant Proteins. Macromol Biosci 2017; 17:10.1002/mabi.201600554. [PMID: 28337848 PMCID: PMC6020822 DOI: 10.1002/mabi.201600554] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2016] [Revised: 02/08/2017] [Indexed: 01/07/2023]
Abstract
Recombinant protein design allows modular protein domains with different functionalities and responsive behaviors to be easily combined. Inclusion of these protein domains can enable recombinant proteins to have complex responses to their environment (e.g., temperature-triggered aggregation followed by enzyme-mediated cleavage for drug delivery or pH-triggered conformational change and self-assembly leading to structural stabilization by adjacent complementary residues). These "smart" behaviors can be tuned by amino acid identity and sequence, chemical modifications, and addition of other components. A wide variety of domains and peptides have smart behavior. This review focuses on protein designs for self-assembly or conformational changes due to stimuli such as shifts in temperature or pH.
Collapse
Affiliation(s)
- Sydney Hollingshead
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, USA
| | - Charng-Yu Lin
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, USA
| | - Julie C. Liu
- Davidson School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-2100, USA
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN 47907-2032, USA
| |
Collapse
|
20
|
|