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Yuan W, Dong GZ, Ning H, Guan XX, Cheng JF, Shi ZW, Du XJ, Meng SW, Liu DS, Dong YC. Applying dynamic light scattering to investigate the self-assembly process of DNA nanostructures. CHINESE CHEM LETT 2023. [DOI: 10.1016/j.cclet.2023.108384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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Ijäs H, Liedl T, Linko V, Posnjak G. A label-free light-scattering method to resolve assembly and disassembly of DNA nanostructures. Biophys J 2022; 121:4800-4809. [PMID: 36811525 PMCID: PMC9811603 DOI: 10.1016/j.bpj.2022.10.036] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 09/06/2022] [Accepted: 10/24/2022] [Indexed: 11/02/2022] Open
Abstract
DNA self-assembly, and in particular DNA origami, has evolved into a reliable workhorse for organizing organic and inorganic materials with nanometer precision and with exactly controlled stoichiometry. To ensure the intended performance of a given DNA structure, it is beneficial to determine its folding temperature, which in turn yields the best possible assembly of all DNA strands. Here, we show that temperature-controlled sample holders and standard fluorescence spectrometers or dynamic light-scattering setups in a static light-scattering configuration allow for monitoring the assembly progress in real time. With this robust label-free technique, we determine the folding and melting temperatures of a set of different DNA origami structures without the need for more tedious protocols. In addition, we use the method to follow digestion of DNA structures in the presence of DNase I and find strikingly different resistances toward enzymatic degradation depending on the structural design of the DNA object.
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Affiliation(s)
- Heini Ijäs
- Biohybrid Materials, Department of Bioproducts and Biosystems, Aalto University, Aalto, Finland; Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Munich, Germany
| | - Tim Liedl
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Munich, Germany
| | - Veikko Linko
- Biohybrid Materials, Department of Bioproducts and Biosystems, Aalto University, Aalto, Finland; LIBER Center of Excellence, Aalto University, Aalto, Finland.
| | - Gregor Posnjak
- Faculty of Physics and Center for NanoScience (CeNS), Ludwig-Maximilians-University, Munich, Germany.
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Gao L, Liu L, Tian Y, Yang Q, Wu P, Fan C, Zhao Q, Li F. Probing the Formation Kinetics and Thermodynamics with Rationally Designed Analytical Tools Enables One-Pot Synthesis and Purification of a Tetrahedral DNA Nanostructure. Anal Chem 2021; 93:7045-7053. [PMID: 33886303 DOI: 10.1021/acs.analchem.1c00363] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
The development of robust analytical tools capable of probing the formation kinetics and thermodynamics of DNA nanostructures is a crucial step toward better understanding and manufacturing of diverse DNA-based materials. Herein, we introduce a real-time fluorescence anisotropy assay and rationally designed DNA reaction termination probes (DRTPs) as a set of new tools for exploring the formation mechanisms of DNA nanostructures. We deployed these tools for probing the formation of a classic tetrahedral DNA nanostructure (TDN) as a model system. Our tools revealed that the formation of TDN was dominated by simultaneous hybridization, whereas its undesired side products were caused mainly through step-wise hybridization. An optimal reaction temperature exists that favors the formation of TDN over side products. With insight into the TDN formation mechanism, we further engineered magnetic DRTPs to achieve single-step purification of TDN, enabling 10-fold improvement in the ratio between the targeted TDN and undesired side products without tedious procedures or bulky instruments. Combining the optimal reaction and purification conditions, we finally demonstrated the one-pot synthesis and purification of TDN. The analytical techniques offered in this work may hold potential to find wide applications and inspire new analytical methods for structural DNA nanotechnology.
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Affiliation(s)
- Lu Gao
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Liying Liu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yunfei Tian
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Qianfan Yang
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Peng Wu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Chunhai Fan
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 201240, China
| | - Qiang Zhao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Feng Li
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Analytical & Testing Center, Sichuan University, Chengdu, Sichuan 610064, P. R. China.,Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
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