1
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Arakawa Y, Inui S, Tsuji H. Synthesis, phase transitions, and liquid crystal behavior of alkylthio azobenzenes. Tetrahedron 2022. [DOI: 10.1016/j.tet.2022.132958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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2
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Xu X, Wang G. Molecular Solar Thermal Systems towards Phase Change and Visible Light Photon Energy Storage. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2022; 18:e2107473. [PMID: 35132792 DOI: 10.1002/smll.202107473] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Indexed: 06/14/2023]
Abstract
Molecular solar thermal (MOST) systems have attracted tremendous attention for solar energy conversion and storage, which can generate high-energy metastable isomers upon capturing photon energy, and release the stored energy as heat on demand during back conversion. However, the pristine molecular photoswitches are limited by low storage energy density and UV light photon energy storage. Recently, numerous pioneering works have been focused on the development of MOST systems towards phase change (PC) and visible light photon energy storage to increase their properties. On the one hand, the strategy of simultaneously capturing isomerization enthalpy and PC energy between solid and liquid can not only offer high latent heat, but also promote the development of sustainable energy systems. On the other hand, the efficient photon energy storage in the visible light range opens a tremendously fascinating avenue to fabricate MOST systems powered under natural sunlight. Here, the recent advances of MOST systems towards PC and visible light photon energy storage are systematically summarized, the most promising advantages and current challenges are analyzed, and emerging strategies and future research directions are proposed.
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Affiliation(s)
- Xingtang Xu
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Guojie Wang
- School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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3
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Simeth NA, de Mendoza P, Dubach VRA, Stuart MCA, Smith JW, Kudernac T, Browne WR, Feringa BL. Photoswitchable architecture transformation of a DNA-hybrid assembly at the microscopic and macroscopic scale. Chem Sci 2022; 13:3263-3272. [PMID: 35414864 PMCID: PMC8926171 DOI: 10.1039/d1sc06490h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Accepted: 02/16/2022] [Indexed: 01/01/2023] Open
Abstract
Molecular recognition-driven self-assembly employing single-stranded DNA (ssDNA) as a template is a promising approach to access complex architectures from simple building blocks. Oligonucleotide-based nanotechnology and soft-materials benefit from the high information storage density, self-correction, and memory function of DNA. Here we control these beneficial properties with light in a photoresponsive biohybrid hydrogel, adding an extra level of function to the system. An ssDNA template was combined with a complementary photo-responsive unit to reversibly switch between various functional states of the supramolecular assembly using a combination of light and heat. We studied the structural response of the hydrogel at both the microscopic and macroscopic scale using a combination of UV-vis absorption and CD spectroscopy, as well as fluorescence, transmission electron, and atomic force microscopy. The hydrogels grown from these supramolecular self-assembly systems show remarkable shape-memory properties and imprinting shape-behavior while the macroscopic shape of the materials obtained can be further manipulated by irradiation. Molecular recognition-driven self-assembly employing single-stranded DNA (ssDNA) as a template is a promising approach to access complex architectures from simple building blocks.![]()
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Affiliation(s)
- Nadja A Simeth
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Paula de Mendoza
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Victor R A Dubach
- Groningen Biomolecular Sciences and Biotechnology, Faculty for Science and Engineering, University of Groningen Nijenborgh 7 9747 AG Groningen The Netherlands
| | - Marc C A Stuart
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands .,Groningen Biomolecular Sciences and Biotechnology, Faculty for Science and Engineering, University of Groningen Nijenborgh 7 9747 AG Groningen The Netherlands
| | - Julien W Smith
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Tibor Kudernac
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Wesley R Browne
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
| | - Ben L Feringa
- Stratingh Institute for Chemistry, Faculty for Science and Engineering, University of Groningen Nijenborgh 4 9747 AG Groningen The Netherlands
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4
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Tavakoli A, Min JH. Photochemical modifications for DNA/RNA oligonucleotides. RSC Adv 2022; 12:6484-6507. [PMID: 35424630 PMCID: PMC8982246 DOI: 10.1039/d1ra05951c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 11/27/2021] [Indexed: 11/29/2022] Open
Abstract
Light-triggered chemical reactions can provide excellent tools to investigate the fundamental mechanisms important in biology. Light is easily applicable and orthogonal to most cellular events, and its dose and locality can be controlled in tissues and cells. Light-induced conversion of photochemical groups installed on small molecules, proteins, and oligonucleotides can alter their functional states and thus the ensuing biological events. Recently, photochemical control of DNA/RNA structure and function has garnered attention thanks to the rapidly expanding photochemistry used in diverse biological applications. Photoconvertible groups can be incorporated in the backbone, ribose, and nucleobase of an oligonucleotide to undergo various irreversible and reversible light-induced reactions such as cleavage, crosslinking, isomerization, and intramolecular cyclization reactions. In this review, we gather a list of photoconvertible groups used in oligonucleotides and summarize their reaction characteristics, impacts on DNA/RNA thermal stability and structure, as well as their biological applications.
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Affiliation(s)
- Amirrasoul Tavakoli
- Department of Chemistry & Biochemistry, Baylor University Waco TX 76706 USA +1-254-710-2095
| | - Jung-Hyun Min
- Department of Chemistry & Biochemistry, Baylor University Waco TX 76706 USA +1-254-710-2095
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5
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Ishii S, Murayama K, Sada K, Asanuma H, Kakugo A. Unexpected Dissociation of Photoresponsive UV-ON DNA Carrying p-tert-Butyl Azobenzene under UV Light Irradiation. CHEM LETT 2022. [DOI: 10.1246/cl.210788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Satsuki Ishii
- Graduate School of Chemical Sciences & Engineering, Hokkaido University, Kita 10 Nishi 8, Sapporo, 060-0810, Japan
| | - Keiji Murayama
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Aichi, 464-8603, Japan
| | - Kazuki Sada
- Graduate School of Chemical Sciences & Engineering, Hokkaido University, Kita 10 Nishi 8, Sapporo, 060-0810, Japan
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Sapporo, 060-0810, Japan
| | - Hiroyuki Asanuma
- Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Aichi, 464-8603, Japan
| | - Akira Kakugo
- Graduate School of Chemical Sciences & Engineering, Hokkaido University, Kita 10 Nishi 8, Sapporo, 060-0810, Japan
- Faculty of Science, Hokkaido University, Kita 10 Nishi 8, Sapporo, 060-0810, Japan
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6
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Zhang L, Gu J, Luo X, Tang Z, Qu Y, Zhang C, Liu H, Liu J, Xie C, Wu Z. Photoregulative phase change biomaterials showing thermodynamic and mchanical stabilities. NANOSCALE 2022; 14:976-983. [PMID: 34989736 DOI: 10.1039/d1nr06000g] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Azobenzenes are great photochromic molecules for switching the physical properties of various materials via trans-cis isomerization. However, the UV light resulted cis-azobenzene is metastable and thermodynamically gets back to trans-azobenzene after ceasing UV irradiation, which causes an unwanted property change of azobenzene-containing materials. Additionally, thermal and mechanical conditions would accelerate this process dramatically. In this present work, a new type of azobenzene-containing surfactant is designed for the fabrication of photoresponsive phase change biomaterials. With a "locked" cis-azobenzene conformation, the resulting biomaterials could maintain their disordered state after ceasing UV light, which exhibit great resistance to thermal and piezo conditions. Interestingly, the "locked" cis-azobenzene could be unlocked by Vis light in high efficiency, which opens a new way for the design of phase change materials only responding to light. By showing stable cis-azobenzene maintained physical state, the newly fabricated biomaterials provide new potential for the construction of advanced materials, like self-healing materials, with less use of long time UV irradiation for maintaining their disordered states.
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Affiliation(s)
- Lei Zhang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Jingjing Gu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Xiliang Luo
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Zhenyu Tang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Yang Qu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Chenghao Zhang
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Han Liu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Jishuai Liu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Congxia Xie
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
| | - Zhongtao Wu
- Key Laboratory of Optic-Electric Sensing and Analytical Chemistry for Life Science, MOE, Shandong Key Laboratory of Biochemical Analysis, College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China.
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7
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Mihara JI, Fujimoto K. Photocrosslinking of DNA using 4-methylpyranocarbazole nucleoside with thymine base selectivity. Org Biomol Chem 2021; 19:9860-9866. [PMID: 34532722 DOI: 10.1039/d1ob01621k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This report describes a novel photocrosslinker, 4-methylpyranocarbazole nucleoside (MEPK), that can be induced to crosslink using visible light. Previously, we reported a visible light-responsive artificial nucleic acid, pyranocarbazole nucleoside (PCX). MEPK can selectively photocrosslink to thymine bases in a complementary nucleic acid strand. It was synthesized by introducing a methyl group at the 4-position of PCX, and it can differentiate between thymine and cytosine. The previously reported visible light-responsive artificial nucleic acid PCX has a low synthetic yield. MEPK was synthesized by Pechmann condensation which suppressed by-product formation, making the synthesis more efficient, and resulting in a higher yield than that of PCX. MEPK is expected to have practical applications as a photocrosslinker that can be manipulated with visible light and that selectively targets thymine bases.
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Affiliation(s)
- Jun-Ichi Mihara
- School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan.
| | - Kenzo Fujimoto
- School of Advanced Science and Technology, Japan Advanced Institute of Science and Technology, Asahidai 1-1, Nomi, Ishikawa, 923-1292, Japan.
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8
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Wang GA, Xu J, Traynor SM, Chen H, Eljabu F, Wu X, Yan H, Li F. DNA Balance for Native Characterization of Chemically Modified DNA. J Am Chem Soc 2021; 143:13655-13663. [PMID: 34404208 DOI: 10.1021/jacs.1c05236] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chemical modification is a powerful approach to expand the chemical diversity and functionality of natural DNA. However, when chemically modified oligonucleotides are employed in DNA-based reactions or structures, it becomes quite difficult to predict, understand, and control their kinetics and thermodynamics. To address this challenge, we introduce a rationally designed DNA balance capable of measuring critical thermodynamic and kinetic properties of chemically modified DNA in their native environment. Our DNA balance is operated using the principle of toehold-exchange, where a panel of weight probes were designed by tuning the lengths of forward and reverse toeholds. Once placed on the DNA balance, the chemical modification will be interrogated using the weight probes to determine changes in both Gibbs free energy and hybridization rate constant. Using cyclic-azobenzene (cAB)-modified DNA as a model system, we demonstrated that our DNA balance could not only measure stable chemical modifications, but also solve more challenging issues where unstable chemical modifications and transient isomerization reactions were involved. We anticipate that our DNA balance will find wide uses for measuring important thermodynamic and kinetic parameters for DNA carrying various chemical modifications, as well as for probing transient chemical changes in DNA.
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Affiliation(s)
- Guan Alex Wang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China.,Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Junpeng Xu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China.,Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Sarah M Traynor
- Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Haodi Chen
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Fatma Eljabu
- Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Xinghong Wu
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu, Sichuan 610064, P. R. China
| | - Hongbin Yan
- Department of Chemistry, Centre for Biotechnology, Brock University, St. Catharines, Ontario L2S 3A1, Canada
| | - Feng Li
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, 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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9
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Muñoz J, Redondo E, Pumera M. Bistable (Supra)molecular Switches on 3D-Printed Responsive Interfaces with Electrical Readout. ACS APPLIED MATERIALS & INTERFACES 2021; 13:12649-12655. [PMID: 33305562 DOI: 10.1021/acsami.0c14487] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Molecular switching memories have gained great importance in recent years because of the current sharp increase in the production of consumer electronics. Herein, 3D-printed nanocomposite carbon electrodes (3D-nCEs) have been explored as unconventional responsive interfaces to electrically readout bistable molecular switches via electrochemical impedance spectroscopy as the output system. As a proof-of-concept, two different 3D-printed responsive interfaces have been devised using surface engineering for covalently anchoring (supra)molecular components that well-define two electrical states (on/off) driven by either electrical or optical stimuli. Accordingly, this work paves the way for the functionalization of 3D-nCEs through fundamental chemistry, opening up new horizons in unprecedented tailored 3D-printed responsive interfaces which could be utilized as potential (bio)sensors, (opto)electronic devices, or molecular logic gates.
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Affiliation(s)
- Jose Muñoz
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
| | - Edurne Redondo
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
| | - Martin Pumera
- Future Energy and Innovation Laboratory, Central European Institute of Technology, Brno University of Technology (CEITEC-BUT), Brno 61600, Czech Republic
- Department of Medical Research, China Medical University Hospital, China Medical University, No. 91 Hsueh-Shih Road, Taichung, Taiwan
- Department of Chemistry and Biochemistry, Mendel University in Brno, Zemedelska 1, Brno CZ-613 00, Czech Republic
- Department of Chemical and Biomolecular Engineering, Yonsei University, 50 Yonsei-ro, Seodaemun-gu, Seoul 03722, Korea
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10
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Zhang L, Zhang X, Feng P, Han Q, Liu W, Lu Y, Song C, Li F. Photodriven Regeneration of G-Quadruplex Aptasensor for Sensitively Detecting Thrombin. Anal Chem 2020; 92:7419-7424. [PMID: 32268723 DOI: 10.1021/acs.analchem.0c00380] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Aptamers have been widely used as recognition elements in electrochemical sensors. However, as the most expensive consumable, the aptasensors regeneration is still a critical challenge for sustainable feasibility and attracting great interest from researchers, due to the high affinity between the aptamers and their targets (the dissociation constant Kd is low to subnanomolar or nanomolar). In this work, we propose a photochromic five-azobenzene-inserted thrombin-aptamer based aptasensor to improve the regenerativity. With ultraviolet light exposure, the trans-structure of azobenzene changes to cis-structure, and open the folded aptamer to realize the aptasensor regeneration. The limit of detection can be sensitive to 3 pM (S/N = 3). The thrombin concentrations were detected to be 2.48 ± 0.02 and 20.26 ± 0.98 nM (n = 3) in duck whole blood and blood serum, respectively. Utilizing surface plasmon resonance, we demonstrated that the certain azobenzene moieties can exactly increase Kd of aptamer-thrombin bounding. The photodriven conversion of thrombin-aptamer from G-quadruplex to loosen structure approaches a convenient regeneration for aptasensor, which will promote its popularization and sustainable feasibility.
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Affiliation(s)
- Liangliang Zhang
- Department of Applied Chemistry, Anhui Agricultural University, Hefei 230036, China
| | - Xiaoyu Zhang
- College of Chemistry and Materials Science Jinan University, Guangzhou 510632, China
| | - Pengju Feng
- College of Chemistry and Materials Science Jinan University, Guangzhou 510632, China
| | - Qi Han
- Department of Applied Chemistry, Anhui Agricultural University, Hefei 230036, China
| | - Wei Liu
- College of Pharmacy, Xinxiang Medical University, Xinxiang 453000, China
| | - Ying Lu
- Department of Applied Chemistry, Anhui Agricultural University, Hefei 230036, China
| | - Chunxia Song
- Department of Applied Chemistry, Anhui Agricultural University, Hefei 230036, China
| | - Fengyu Li
- College of Chemistry and Materials Science Jinan University, Guangzhou 510632, China
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11
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Xu J, Miyamoto S, Tojo S, Kawai K. Sulfonated Pyrene as a Photoregulator for Single‐Stranded DNA Looping. Chemistry 2020; 26:5075-5084. [DOI: 10.1002/chem.202000184] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 02/14/2020] [Indexed: 12/29/2022]
Affiliation(s)
- Jie Xu
- The Institute of Scientific and Industrial Research (SANKEN)Osaka University Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
| | - Shunichi Miyamoto
- The Institute of Scientific and Industrial Research (SANKEN)Osaka University Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
| | - Sachiko Tojo
- The Institute of Scientific and Industrial Research (SANKEN)Osaka University Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
| | - Kiyohiko Kawai
- The Institute of Scientific and Industrial Research (SANKEN)Osaka University Mihogaoka 8-1 Ibaraki, Osaka 567-0047 Japan
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12
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Zhang L, Linden G, Vázquez O. In search of visible-light photoresponsive peptide nucleic acids (PNAs) for reversible control of DNA hybridization. Beilstein J Org Chem 2019; 15:2500-2508. [PMID: 31728164 PMCID: PMC6839558 DOI: 10.3762/bjoc.15.243] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Accepted: 10/01/2019] [Indexed: 12/12/2022] Open
Abstract
Photoswitchable oligonucleotides can determine specific biological outcomes by light-induced conformational changes. In particular, artificial probes activated by visible-light irradiation are highly desired in biological applications. Here, we report two novel types of visible-light photoswitchable peptide nucleic acids (PNAs) based on the molecular transducers: hemithioindigo and tetra-ortho-fluoroazobenzene. Our study reveals that the tetra-ortho-fluoroazobenzene-PNA conjugates have promising properties (fast reversible isomerization, exceptional thermal stability, high isomer conversions and sensitivity to visible-light irradiation) as reversible modulators to control oligonucleotide hybridization in biological contexts. Furthermore, we verified that this switchable modification delivers a slightly different hybridization behavior in the PNA. Thus, both melting experiments and strand-displacement assays showed that in all the cases the trans-isomer is the one with superior binding affinities. Alternative versions, inspired by our first compounds here reported, may find applications in different fields such as chemical biology, nanotechnology and materials science.
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Affiliation(s)
- Lei Zhang
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
| | - Greta Linden
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
| | - Olalla Vázquez
- Fachbereich Chemie, Philipps-Universität Marburg, Hans-Meerwein Straße 4, 35043 Marburg, Germany
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