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Abernathy HG, Saha J, Kemp LK, Wadhwani P, Clemons TD, Morgan SE, Rangachari V. De novo amyloid peptides with subtle sequence variations differ in their self-assembly and nanomechanical properties. SOFT MATTER 2023; 19:5150-5159. [PMID: 37386911 DOI: 10.1039/d3sm00604b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/01/2023]
Abstract
Proteinaceous amyloids are well known for their widespread pathological roles but lately have emerged also as key components in several biological functions. The remarkable ability of amyloid fibers to form tightly packed conformations in a cross β-sheet arrangement manifests in their robust enzymatic and structural stabilities. These characteristics of amyloids make them attractive for designing proteinaceous biomaterials for various biomedical and pharmaceutical applications. In order to design customizable and tunable amyloid nanomaterials, it is imperative to understand the sensitivity of the peptide sequence for subtle changes based on amino acid position and chemistry. Here we report our results from four rationally-designed amyloidogenic decapeptides that subtly differ in hydrophobicity and polarity at positions 5 and 6. We show that making the two positions hydrophobic renders the peptide with enhanced aggregation and material properties while introducing polar residues in position 5 dramatically changes the structure and nanomechanical properties of the fibrils formed. A charged residue at position 6, however, abrogates amyloid formation. In sum, we show that subtle changes in the sequence do not make the peptide innocuous but rather sensitive to aggregation, reflected in the biophysical and nanomechanical properties of the fibrils. We conclude that tolerance of peptide amyloid for changes in the sequence, however small they may be, should not be neglected for the effective design of customizable amyloid nanomaterials.
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Affiliation(s)
- Hannah G Abernathy
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Jhinuk Saha
- Department of Chemistry and Biochemistry, School of Mathematics and Natural Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Lisa K Kemp
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Parvesh Wadhwani
- Department of Molecular Biophysics (IBG 2), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344, Karlsruhe, Germany
| | - Tristan D Clemons
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Sarah E Morgan
- School of Polymer Science & Engineering, University of Southern Mississippi, Hattiesburg, MS, USA.
| | - Vijayaraghavan Rangachari
- Department of Chemistry and Biochemistry, School of Mathematics and Natural Sciences, University of Southern Mississippi, Hattiesburg, MS, USA.
- Center for Molecular and Cellular Biosciences, University of Southern Mississippi, Hattiesburg, MS, USA
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2
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Huo Y, Hu J, Yin Y, Liu P, Cai K, Ji W. Self-Assembling Peptide-Based Functional Biomaterials. Chembiochem 2023; 24:e202200582. [PMID: 36346708 DOI: 10.1002/cbic.202200582] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2022] [Revised: 11/08/2022] [Indexed: 11/11/2022]
Abstract
Peptides can self-assemble into various hierarchical nanostructures through noncovalent interactions and form functional materials exhibiting excellent chemical and physical properties, which have broad applications in bio-/nanotechnology. The self-assembly mechanism, self-assembly morphology of peptide supramolecular architecture and their various applications, have been widely explored which have the merit of biocompatibility, easy preparation, and controllable functionality. Herein, we introduce the latest research progress of self-assembling peptide-based nanomaterials and review their applications in biomedicine and optoelectronics, including tissue engineering, anticancer therapy, biomimetic catalysis, energy harvesting. We believe that this review will inspire the rational design and development of novel peptide-based functional bio-inspired materials in the future.
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Affiliation(s)
- Yehong Huo
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Jian Hu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Yuanyuan Yin
- Chongqing Key Laboratory of Oral Diseases and Biomedical Sciences, Chongqing Municipal Key Laboratory of Oral Biomedical Engineering of Higher Education, Stomatological Hospital of Chongqing Medical University, Chongqing, 401147, P. R. China
| | - Peng Liu
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Kaiyong Cai
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, P. R. China
| | - Wei Ji
- Key Laboratory of Biorheological Science and Technology, Ministry of Education, College of Bioengineering, Chongqing University, Chongqing, 400044, P. R. China
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3
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Recent advances of interfacial and rheological property based techno-functionality of food protein amyloid fibrils. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107827] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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4
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Yuca E, Şeker UÖŞ. Monitoring Molecular Assembly of Biofilms Using Quartz Crystal Microbalance with Dissipation (QCM-D). Methods Mol Biol 2022; 2538:25-33. [PMID: 35951291 DOI: 10.1007/978-1-0716-2529-3_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The structure and the functionality of biofilm proteins, the main components of the extracellular matrix, can be tuned by protein engineering. The use of binding kinetics data has been demonstrated in the characterization of recombinantly produced biofilm proteins to control their behavior on certain surfaces or under certain conditions. Quartz crystal microbalance with dissipation monitoring (QCM-D) allows measuring the change in resonance frequency and the energy loss and distribution upon the interaction of molecules with the surface. The characterization of the molecular assembly of curli biofilm proteins on different surfaces using QCM-D is presented here as a detailed protocol. The experimental procedure detailed in this chapter can be applied and modified for other biofilm proteins or subunits to determine their surface adsorption and kinetic binding characteristics.
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Affiliation(s)
- Esra Yuca
- Molecular Biology and Genetics Department, Yildiz Technical University, İstanbul, Turkey
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5
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Ren H, Wu L, Tan L, Bao Y, Ma Y, Jin Y, Zou Q. Self-assembly of amino acids toward functional biomaterials. BEILSTEIN JOURNAL OF NANOTECHNOLOGY 2021; 12:1140-1150. [PMID: 34760429 PMCID: PMC8551877 DOI: 10.3762/bjnano.12.85] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 09/30/2021] [Indexed: 06/13/2023]
Abstract
Biomolecules, such as proteins and peptides, can be self-assembled. They are widely distributed, easy to obtain, and biocompatible. However, the self-assembly of proteins and peptides has disadvantages, such as difficulty in obtaining high quantities of materials, high cost, polydispersity, and purification limitations. The difficulties in using proteins and peptides as functional materials make it more complicate to arrange assembled nanostructures at both microscopic and macroscopic scales. Amino acids, as the smallest constituent of proteins and the smallest constituent in the bottom-up approach, are the smallest building blocks that can be self-assembled. The self-assembly of single amino acids has the advantages of low synthesis cost, simple modeling, excellent biocompatibility and biodegradability in vivo. In addition, amino acids can be assembled with other components to meet multiple scientific needs. However, using these simple building blocks to design attractive materials remains a challenge due to the simplicity of the amino acids. Most of the review articles about self-assembly focus on large molecules, such as peptides and proteins. The preparation of complicated materials by self-assembly of amino acids has not yet been evaluated. Therefore, it is of great significance to systematically summarize the literature of amino acid self-assembly. This article reviews the recent advances in amino acid self-assembly regarding amino acid self-assembly, functional amino acid self-assembly, amino acid coordination self-assembly, and amino acid regulatory functional molecule self-assembly.
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Affiliation(s)
- Huan Ren
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Lifang Wu
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Lina Tan
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Yanni Bao
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Yuchen Ma
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Yong Jin
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
| | - Qianli Zou
- School of Pharmacy, Anhui Medical University, Hefei 230032, China
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Kumar V, Sinha N, Thakur AK. Necessity of regulatory guidelines for the development of amyloid based biomaterials. Biomater Sci 2021; 9:4410-4422. [PMID: 34018497 DOI: 10.1039/d1bm00059d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Amyloid diseases are caused due to protein homeostasis failure where incorrectly folded proteins/peptides form cross-β-sheet rich amyloid fibrillar structures. Besides proteins/peptides, small metabolite assemblies also exhibit amyloid-like features. These structures are linked to several human and animal diseases. In addition, non-toxic amyloids with diverse physiological roles are characterized as a new functional class. This finding, along with the unique properties of amyloid like stability and mechanical strength, led to a surge in the development of amyloid-based biomaterials. However, the usage of these materials by humans and animals may pose a health risk such as the development of amyloid diseases and toxicity. This is possible because amyloid-based biomaterials and their fragments may assist seeding and cross-seeding mechanisms of amyloid formation in the body. This review summarizes the potential uses of amyloids as biomaterials, the concerns regarding their usage, and a prescribed workflow to initiate a regulatory approach.
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Affiliation(s)
- Vijay Kumar
- Department of Molecular Microbiology and Biotechnology, Shmunis School of Biomedicine and Cancer Research, George S. Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
| | - Nabodita Sinha
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, UP-208016, India.
| | - Ashwani Kumar Thakur
- Department of Biological Sciences and Bioengineering, Indian Institute of Technology Kanpur, UP-208016, India.
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Sahin Kehribar E, Isilak ME, Bozkurt EU, Adamcik J, Mezzenga R, Seker UOS. Engineering of biofilms with a glycosylation circuit for biomaterial applications. Biomater Sci 2021; 9:3650-3661. [PMID: 33710212 DOI: 10.1039/d0bm02192j] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Glycosylation is a crucial post-translational modification for a wide range of functionalities. Adhesive protein-based biomaterials in nature rely on heavily glycosylated proteins such as spider silk and mussel adhesive proteins. Engineering protein-based biomaterials genetically enables desired functions and characteristics. Additionally, utilization of glycosylation for biomaterial engineering can expand possibilities by including saccharides to the inventory of building blocks. Here, de novo glycosylation of Bacillus subtilis amyloid-like biofilm protein TasA using a Campylobacter jejuni glycosylation circuit is proposed to be a novel biomaterial engineering method for increasing adhesiveness of TasA fibrils. A C. jejuni glycosylation motif is genetically incorporated to tasA gene and expressed in Escherichia coli containing the C. jejuni pgl protein glycosylation pathway. Glycosylated TasA fibrils indicate enhanced adsorption on the gold surface without disruption of fibril formation. Our findings suggest that N-linked glycosylation can be a promising tool for engineering protein-based biomaterials specifically regarding adhesion.
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Affiliation(s)
- Ebru Sahin Kehribar
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
| | - Musa Efe Isilak
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
| | - Eray Ulas Bozkurt
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
| | - Jozef Adamcik
- ETH Zurich, Department of Health Sciences and Technology, 8092 Zurich, Switzerland and Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Raffaele Mezzenga
- ETH Zurich, Department of Health Sciences and Technology, 8092 Zurich, Switzerland and Department of Materials, ETH Zurich, 8093 Zurich, Switzerland
| | - Urartu Ozgur Safak Seker
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, 06800 Ankara, Turkey.
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Lin Z, Long M, Liu W, Liu T, Li F, Wu Y. Distinct biofilm formation regulated by different culture media: Implications to electricity generation. Bioelectrochemistry 2021; 140:107826. [PMID: 33984692 DOI: 10.1016/j.bioelechem.2021.107826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 04/03/2021] [Accepted: 04/14/2021] [Indexed: 10/21/2022]
Abstract
Biofilm of Shewanella oneidensis MR-1 is extensively studied as it can transform organic compounds directly into electricity. Although revealing the biofilm regulation mechanism is crucial for enhancing bio-current, studies regarding the mechanism by which the culture condition affects biofilm formation are still lacking. The biofilm formation of S. oneidensis MR-1 in two typical media with same electron donor was investigated in this study. Bio-electricity increased 1.8 times in medium with phosphate-buffered saline (PBS) than in piperazine-1,4-bisethanesulfonic acid (PIPES). Biofilm total protein has 1.5-fold of difference between two media at day 3, and biofilm structures also differed; a fluffy biofilm with curled cells was formed in medium with PBS, whereas a compact, ordered, and closely attached biofilm was formed in medium with PIPES. Transcriptome studies clarified that the expression of genes beneficial for cell aggregation [e.g., aggA (2.3 fold), bpfA (2.8 fold) and csgB (3.9 fold)] in medium with PIPES was significantly upregulated, thus provided an explanation for the specific biofilm structure. Buffer concentration was proved to be a critical factor impacted cell morphology and current generation. The maximum current density in 30 mM of PBS and PIPES is 165 and 159 μA·cm-2 respectively, but it increased to 327 and 274 μA·cm-2 in 200 mM of PBS and PIPES. This study provides new insights into the mechanism of medium-dependent biofilm regulation, which will be beneficial for developing simple and efficient strategies to enhance bio-electricity generation.
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Affiliation(s)
- Zhixin Lin
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China; Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Mingliang Long
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China; Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Wei Liu
- College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China.
| | - Tongxu Liu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China
| | - Fangbai Li
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China; National-Regional Joint Engineering ResearchCenter for Soil Pollution Control and Remediation in South China,Guangzhou 510650, China
| | - Yundang Wu
- Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management, Institute of Eco-environmental and Soil Sciences, Guangdong Academy of Sciences, Guangzhou 510650, China.
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9
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Yuca E, Şahin Kehribar E, Şeker UÖŞ. Interaction of microbial functional amyloids with solid surfaces. Colloids Surf B Biointerfaces 2021; 199:111547. [PMID: 33385820 DOI: 10.1016/j.colsurfb.2020.111547] [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: 10/21/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 10/22/2022]
Abstract
HYPOTHESIS Self-assembling protein subunits hold great potential as biomaterials with improved functions. Among the self-assembled protein structures functional amyloids are promising unique properties such as resistance to harsh physical and chemical conditions their mechanical strength, and ease of functionalization. Curli proteins, which are functional amyloids of bacterial biofilms can be programmed as intelligent biomaterials. EXPERIMENTS In order to obtain controllable curli based biomaterials for biomedical applications, and to understand role of each of the curli forming monomeric proteins (namely CsgA and CsgB from Escherichia coli) we characterized their binding kinetics to gold, hydroxyapatite, and silica surfaces. FINDINGS We demonstrated that CsgA, CsgB, and their equimolar mixture have different binding strengths for different surfaces. On hydroxyapatite and silica surfaces, CsgB is the crucial element that determines the final adhesiveness of the CsgA-CsgB mixture. On the gold surface, on the other hand, CsgA controls the behavior of the mixture. Those findings uncover the binding behavior of curli proteins CsgA and CsgB on different biomedically valuable surfaces to obtain a more precise control on their adhesion to a targeted surface.
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Affiliation(s)
- Esra Yuca
- Molecular Biology and Genetics Department, Yildiz Technical University, 34210 Istanbul, Turkey
| | - Ebru Şahin Kehribar
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, TR-06800 Ankara, Turkey
| | - Urartu Özgür Şafak Şeker
- UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, TR-06800 Ankara, Turkey.
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10
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11
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Louros N, Konstantoulea K, De Vleeschouwer M, Ramakers M, Schymkowitz J, Rousseau F. WALTZ-DB 2.0: an updated database containing structural information of experimentally determined amyloid-forming peptides. Nucleic Acids Res 2020; 48:D389-D393. [PMID: 31504823 PMCID: PMC6943037 DOI: 10.1093/nar/gkz758] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/13/2019] [Accepted: 08/30/2019] [Indexed: 02/06/2023] Open
Abstract
Transition of soluble proteins into insoluble amyloid fibrils is driven by self-propagating short sequence stretches. However, accurate prediction of aggregation determinants remains challenging. Here, we describe WALTZ-DB 2.0, an updated and significantly expanded open-access database providing information on experimentally determined amyloid-forming hexapeptide sequences (http://waltzdb.switchlab.org/). We have updated WALTZ-DB 2.0 with new entries, including: (i) experimental validation of an in-house developed dataset of 229 hexapeptides, using electron microscopy and Thioflavin-T binding assays; (ii) manual curation of 98 amyloid-forming peptides isolated from literature. Furthermore, the content has been expanded by adding novel structural information for peptide entries, including sequences of the previous version. Using a computational methodology developed in the Switch lab, we have generated 3D-models of the putative amyloid fibril cores of WALTZ-DB 2.0 entries. Structural models, coupled with information on the energetic contributions and fibril core stabilities, can be accessed through individual peptide entries. Customized filtering options for subset selections and new modelling graphical features were added to upgrade online accessibility, providing a user-friendly interface for browsing, downloading and updating. WALTZ-DB 2.0 remains the largest open-access repository for amyloid fibril formation determinants and will continue to enhance the development of new approaches focused on accurate prediction of aggregation prone sequences.
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Affiliation(s)
- Nikolaos Louros
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
| | - Katerina Konstantoulea
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
| | - Matthias De Vleeschouwer
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
| | - Meine Ramakers
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
| | - Joost Schymkowitz
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
| | - Frederic Rousseau
- VIB Center for Brain & Disease Research, Switch Laboratory, Leuven, 3000, Belgium.,KU Leuven, Department of Cellular and Molecular Medicine, Leuven, 3000, Belgium
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12
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Functionalization of polyethylene terephthalate knitted fabric with cowpea protein and biopolymer complex: Applications for enhancing wettability and UV-Protection properties. J Colloid Interface Sci 2020; 565:360-367. [DOI: 10.1016/j.jcis.2019.12.126] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2019] [Revised: 12/23/2019] [Accepted: 12/28/2019] [Indexed: 01/19/2023]
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13
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Olmez TT, Sahin Kehribar E, Isilak ME, Lu TK, Seker UOS. Synthetic Genetic Circuits for Self-Actuated Cellular Nanomaterial Fabrication Devices. ACS Synth Biol 2019; 8:2152-2162. [PMID: 31419103 DOI: 10.1021/acssynbio.9b00235] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Genetically controlled synthetic biosystems are being developed to create nanoscale materials. These biosystems are modeled on the natural ability of living cells to synthesize materials: many organisms have dedicated proteins that synthesize a wide range of hard tissues and solid materials, such as nanomagnets and biosilica. We designed an autonomous living material synthesizing system consisting of engineered cells with genetic circuits that synthesize nanomaterials. The circuits encode a nanomaterial precursor-sensing module (sensor) coupled with a materials synthesis module. The sensor detects the presence of cadmium, gold, or iron ions, and this detection triggers the synthesis of the related nanomaterial-nucleating extracellular matrix. We demonstrate that when engineered cells sense the availability of a precursor ion, they express the corresponding extracellular matrix to form the nanomaterials. This proof-of-concept study shows that endowing cells with synthetic genetic circuits enables nanomaterial synthesis and has the potential to be extended to the synthesis of a variety of nanomaterials and biomaterials using a green approach.
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Affiliation(s)
- Tolga Tarkan Olmez
- UNAM- Institute of Materials and Nanotechnology, Bilkent University, Ankara, Turkey
| | - Ebru Sahin Kehribar
- UNAM- Institute of Materials and Nanotechnology, Bilkent University, Ankara, Turkey
| | - Musa Efe Isilak
- UNAM- Institute of Materials and Nanotechnology, Bilkent University, Ankara, Turkey
| | - Timothy K. Lu
- Synthetic Biology Center, Department of Biological Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts, United States
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14
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Ahan RE, Saltepe B, Apaydin O, Seker UOS. Cellular Biocatalysts Using Synthetic Genetic Circuits for Prolonged and Durable Enzymatic Activity. Chembiochem 2019; 20:1799-1809. [DOI: 10.1002/cbic.201800767] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/08/2019] [Indexed: 11/11/2022]
Affiliation(s)
- Recep Erdem Ahan
- UNAM-Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center Bilkent University 06800 Ankara Turkey
| | - Behide Saltepe
- UNAM-Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center Bilkent University 06800 Ankara Turkey
| | - Onur Apaydin
- UNAM-Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center Bilkent University 06800 Ankara Turkey
| | - Urartu Ozgur Safak Seker
- UNAM-Institute of Materials Science and NanotechnologyNational Nanotechnology Research Center Bilkent University 06800 Ankara Turkey
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15
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Pakkaner E, Yalçın D, Uysal B, Top A. Self-assembly behavior of the keratose proteins extracted from oxidized Ovis aries wool fibers. Int J Biol Macromol 2019; 125:1008-1015. [PMID: 30572050 DOI: 10.1016/j.ijbiomac.2018.12.129] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 12/02/2018] [Accepted: 12/16/2018] [Indexed: 10/27/2022]
Abstract
Water soluble keratose proteins were obtained from an Ovis Aries wool using peracetic acid oxidation. The wool samples and the extracted keratose proteins were characterized by using FTIR, XRD, SEM and TGA techniques. Fractions of α-keratose (MW = 43-53 kDa) along with protein species with molecular weights between 23 kDa and 33 kDa were identified in the SDS-PAGE analysis result of the extracted protein mixture. DLS and AFM experiments indicated that self-assembled globular nanoparticles with diameters between 15 nm and 100 nm formed at 5 mg/ml keratose concentration. On the other hand, upon incubation of 10 w % keratose solutions at 37 °C and 50 °C, interconnected keratose hydrogels with respective storage modulus (G') values of 0.17 ± 0.03 kPa and 3.7 ± 0.5 kPa were obtained. It was shown that the keratose hydrogel prepared at 37 °C supported L929 mouse fibroblast cell proliferation which suggested that these keratose hydrogels could be promising candidates in soft tissue engineering applications.
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Affiliation(s)
- Efecan Pakkaner
- Department of Chemical Engineering, İzmir Institute of Technology, Urla, İzmir, Turkey
| | - Damla Yalçın
- Department of Chemical Engineering, İzmir Institute of Technology, Urla, İzmir, Turkey
| | - Berk Uysal
- Department of Chemical Engineering, İzmir Institute of Technology, Urla, İzmir, Turkey
| | - Ayben Top
- Department of Chemical Engineering, İzmir Institute of Technology, Urla, İzmir, Turkey.
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16
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Díaz-Caballero M, Fernández MR, Navarro S, Ventura S. Prion-based nanomaterials and their emerging applications. Prion 2018; 12:266-272. [PMID: 30196749 PMCID: PMC6277190 DOI: 10.1080/19336896.2018.1521235] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2018] [Revised: 08/22/2018] [Accepted: 08/23/2018] [Indexed: 12/12/2022] Open
Abstract
Protein misfolding and aggregation into highly ordered fibrillar structures have been traditionally associated with pathological processes. Nevertheless, nature has taken advantage of the particular properties of amyloids for functional purposes, like in the protection of organisms against environmental changing conditions. Over the last decades, these fibrillar structures have inspired the design of new nanomaterials with intriguing applications in biomedicine and nanotechnology such as tissue engineering, drug delivery, adhesive materials, biodegradable nanocomposites, nanowires or biosensors. Prion and prion-like proteins, which are considered a subclass of amyloids, are becoming ideal candidates for the design of new and tunable nanomaterials. In this review, we discuss the particular properties of this kind of proteins, and the current advances on the design of new materials based on prion sequences.
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Affiliation(s)
- Marta Díaz-Caballero
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autonoma de Barcelona, Bellaterra (Barcelona), Spain
| | - Maria Rosario Fernández
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autonoma de Barcelona, Bellaterra (Barcelona), Spain
| | - Susanna Navarro
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autonoma de Barcelona, Bellaterra (Barcelona), Spain
| | - Salvador Ventura
- Institut de Biotecnologia i de Biomedicina and Departament de Bioquímica i Biologia Molecular, Universitat Autonoma de Barcelona, Bellaterra (Barcelona), Spain
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