1
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Takezawa Y, Kudo N, Fuse N, Shionoya M. DNA three-way junction structures with amino acid side chains prepared via post-synthetic amide condensation. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2024:1-14. [PMID: 38359331 DOI: 10.1080/15257770.2024.2314645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2023] [Accepted: 01/30/2024] [Indexed: 02/17/2024]
Abstract
DNA three-way junction (3WJ) structures with three amino acid side chains in the core have been synthesized via post-synthetic DNA modification. Amide condensation reactions of oligonucleotides containing 2'-aminouridine with activated esters yielded DNA strands modified with His, Cys and Asp side chains to form modified 3WJs. Even a 3WJ with three negatively charged Asp side chains formed stably at room temperature. Furthermore, DNA hybridization alone placed two (His and Asp) and three (His, Cys, and Asp) side chains within the 3WJs, indicating that the DNA 3WJs are a useful platform for spatial arrangement of amino acid side chains.
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Affiliation(s)
- Yusuke Takezawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Naofumi Kudo
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Nobuyuki Fuse
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, Tokyo, Japan
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2
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Brumett R, Danai L, Coffman A, Radwan Y, Teter M, Hayth H, Doe E, Pranger K, Thornburgh S, Dittmer A, Li Z, Kim TJ, Afonin KA, Khisamutdinov EF. Design and Characterization of Compact, Programmable, Multistranded Nonimmunostimulatory Nucleic Acid Nanoparticles Suitable for Biomedical Applications. Biochemistry 2024; 63:312-325. [PMID: 38271599 DOI: 10.1021/acs.biochem.3c00615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2024]
Abstract
We report a thorough investigation of the role of single-stranded thymidine (ssT) linkers in the stability and flexibility of minimal, multistranded DNA nanostructures. We systematically explore the impact of varying the number of ssTs in three-way junction motifs (3WJs) on their formation and properties. Through various UV melting experiments and molecular dynamics simulations, we demonstrate that while the number of ssTs minimally affects thermodynamic stability, the increasing ssT regions significantly enhance the structural flexibility of 3WJs. Utilizing this knowledge, we design triangular DNA nanoparticles with varying ssTs, all showing exceptional assembly efficiency except for the 0T triangle. All triangles demonstrate enhanced stability in blood serum and are nonimmunostimulatory and nontoxic in mammalian cell lines. The 4T 3WJ is chosen as the building block for constructing other polygons due to its enhanced flexibility and favorable physicochemical characteristics, making it a versatile choice for creating cost-effective, stable, and functional DNA nanostructures that can be stored in the dehydrated forms while retaining their structures. Our study provides valuable insights into the design and application of nucleic acid nanostructures, emphasizing the importance of understanding stability and flexibility in the realm of nucleic acid nanotechnology. Our findings suggest the intricate connection between these ssTs and the structural adaptability of DNA 3WJs, paving the way for more precise design and engineering of nucleic acid nanosystems suitable for broad biomedical applications.
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Affiliation(s)
- Ross Brumett
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Leyla Danai
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Abigail Coffman
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Yasmine Radwan
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Megan Teter
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Hannah Hayth
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Erwin Doe
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Katelynn Pranger
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Sable Thornburgh
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Allison Dittmer
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Zhihai Li
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
| | - Tae Jin Kim
- Department of Physical Sciences, West Virginia University Institute of Technology, Beckley, West Virginia 25801, United States
| | - Kirill A Afonin
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, North Carolina 28223, United States
| | - Emil F Khisamutdinov
- Department of Chemistry, Ball State University, Muncie, Indiana 47306, United States
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3
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Martínez-Fernández L, Kohl FR, Zhang Y, Ghosh S, Saks AJ, Kohler B. Triplet Excimer Formation in a DNA Duplex with Silver Ion-Mediated Base Pairs. J Am Chem Soc 2024; 146:1914-1925. [PMID: 38215466 DOI: 10.1021/jacs.3c08793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2024]
Abstract
The dynamics of excited electronic states in self-assembled structures formed between silver(I) ions and cytosine-containing DNA strands or monomeric cytosine derivatives were investigated by time-resolved infrared (TRIR) spectroscopy and quantum mechanical calculations. The steady-state and time-resolved spectra depend sensitively on the underlying structures, which change with pH and the nucleobase and silver ion concentrations. At pH ∼ 4 and low dC20 strand concentration, an intramolecularly folded i-motif is observed, in which protons, and not silver ions, mediate C-C base pairing. However, at the higher strand concentrations used in the TRIR measurements, dC20 strands associate pairwise to yield duplex structures containing C-Ag+-C base pairs with a high degree of propeller twisting. UV excitation of the silver ion-mediated duplex produces a long-lived excited state, which we assign to a triplet excimer state localized on a pair of stacked cytosines. The computational results indicate that the propeller-twisted motifs induced by metal-ion binding are responsible for the enhanced intersystem crossing that populates the triplet state and not a generic heavy atom effect. Although triplet excimer states have been discussed frequently as intermediates in the formation of cyclobutane pyrimidine dimers, we find neither computational nor experimental evidence for cytosine-cytosine photoproduct formation in the systems studied. These findings provide a rare demonstration of a long-lived triplet excited state that is formed in a significant yield in a DNA duplex, demonstrating that supramolecular structural changes induced by metal ion binding profoundly affect DNA photophysics.
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Affiliation(s)
- Lara Martínez-Fernández
- Departamento de Química, Facultad de Ciencias and Institute for Advanced Research in Chemical Science (IADCHEM), Universidad Autónoma de Madrid, Campus de Excelencia UAM-CSIC, Cantoblanco, 28049 Madrid, Spain
| | - Forrest R Kohl
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, 43210 Ohio, United States
| | - Yuyuan Zhang
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, 43210 Ohio, United States
| | - Supriya Ghosh
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, 43210 Ohio, United States
| | - Andrew J Saks
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, 43210 Ohio, United States
| | - Bern Kohler
- Department of Chemistry and Biochemistry, 100 West 18th Avenue, Columbus, 43210 Ohio, United States
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Fesseha YA, Manayia AH, Liu PC, Su TH, Huang SY, Chiu CW, Cheng CC. Photoreactive silver-containing supramolecular polymers that form self-assembled nanogels for efficient antibacterial treatment. J Colloid Interface Sci 2024; 654:967-978. [PMID: 37898080 DOI: 10.1016/j.jcis.2023.10.119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 10/03/2023] [Accepted: 10/22/2023] [Indexed: 10/30/2023]
Abstract
In this study, an efficient synthetic strategy and potential route to obtain a photo-reactive silver-containing cytosine-functionalized polypropylene glycol polymer (Ag-Cy-PPG) was developed by combining a hydrophilic oligomeric polypropylene glycol (PPG) backbone with dual pH-sensitive/photo-reactive cytosine-silver-cytosine (Cy-Ag-Cy) linkages. The resulting photo-responsive Ag-Cy-PPG holds great promise as a multifunctional biomedical material that generates spherical-like nanogels in water; the nanogels exhibit high antibacterial activity and thus may significantly enhance the efficacy of antibacterial treatment. Due to the formation of photo-dimerized Cy-Ag-Cy cross-linkages after UV irradiation, Ag-Cy-PPG converts into water-soluble cross-linked nanogels that possess a series of interesting chemical and physical properties, such as intense and stable fluorescence behavior, highly sensitive pH-responsive characteristics, on/off switchable phase transition behavior, and well-controlled release of silver ions (Ag+) in mildly acidic aqueous solution. Importantly, antibacterial tests clearly demonstrated that irradiated Ag-Cy-PPG nanogels exhibited strong antibacterial activity at low doses (MIC values of < 50 μg/mL) against gram-positive and gram-negative bacterial pathogens, whereas non-irradiated Ag-Cy-PPG nanogels did not inhibit the viability of bacterial pathogens. These results indicate that irradiated Ag-Cy-PPG nanogels undergo a highly sensitive structural change in the bacterial microenvironment due to their relatively unstable π-conjugated structures (compared to non-irradiated nanogels); this change results in a rapid structural response that promotes intracellular release of Ag+ and induces potent antibacterial ability. Overall, this newly created metallo-supramolecular system may potentially provide an efficient route to dramatically enhance the therapeutic effectiveness of antibacterial treatments.
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Affiliation(s)
- Yohannes Asmare Fesseha
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Abere Habtamu Manayia
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ping-Cheng Liu
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Ting-Hsuan Su
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Sin-Yu Huang
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chih-Wei Chiu
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, Taipei 10607, Taiwan
| | - Chih-Chia Cheng
- Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 10607, Taiwan; Advanced Membrane Materials Research Center, National Taiwan University of Science and Technology, Taipei 10607, Taiwan.
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5
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Takezawa Y, Kanemaru D, Kudo N, Shionoya M. Phenanthroline-modified DNA three-way junction structures stabilized by interstrand 3 : 1 metal complexation. Dalton Trans 2023; 52:11025-11029. [PMID: 37309206 DOI: 10.1039/d3dt01508d] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Incorporation of interstrand metal complexes into DNA is a versatile strategy for metal-dependent stabilization and structural induction of DNA supramolecular structures. In this study, we have synthesized DNA three-way junction (3WJ) structures modified with phenanthroline (phen) ligands. The phen-modified 3WJ was found to be thermally stabilized (ΔTm = +16.9 °C) by the formation of an interstrand NiII(phen)3 complex. Furthermore, NiII-mediated structure induction of 3WJs was demonstrated with the phen-modified strands and their unmodified counterparts. This study suggests that ligand-modified 3WJs would be useful structural motifs for the construction of metal-responsive DNA molecular systems.
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Affiliation(s)
- Yusuke Takezawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Daisuke Kanemaru
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Naofumi Kudo
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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Takezawa Y, Sakakibara S, Shionoya M. Bipyridine-Modified DNA Three-Way Junctions with Amide linkers: Metal-Dependent Structure Induction and Self-Sorting. Chemistry 2021; 27:16626-16633. [PMID: 34623721 DOI: 10.1002/chem.202102977] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Indexed: 11/12/2022]
Abstract
DNA three-way junction (3WJ) structures are essential building blocks for the construction of DNA nanoarchitectures. We have synthesized a bipyridine (bpy)-modified DNA 3WJ by using a newly designed bpy-modified nucleoside, Ubpy -3, in which a bpy ligand is tethered via a stable amide linker. The thermal stability of the bpy-modified 3WJ was greatly enhanced by the formation of an interstrand NiII (bpy)3 complex at the junction core (ΔTm =+17.7 °C). Although the stereochemistry of the modification site differs from that of the previously reported bpy-modified nucleoside Ubpy -2, the degree of the NiII -mediated stabilization observed with Ubpy -3 was comparable to that of Ubpy -2. Structure induction of the 3WJs and the duplexes was carried out by the addition or removal of NiII ions. Furthermore, NiII -mediated self-sorting of 3WJs was performed by using the bpy-modified strands and their unmodified counterparts. Both transformations were driven by the formation of NiII (bpy)3 complexes. The structural induction and self-sorting of bpy-modified 3WJs are expected to have many potential applications in the development of metal-responsive DNA materials.
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Affiliation(s)
- Yusuke Takezawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Shiori Sakakibara
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, 113-0033, Japan
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Nishiyama K, Mori K, Takezawa Y, Shionoya M. Metal-responsive reversible binding of triplex-forming oligonucleotides with 5-hydroxyuracil nucleobases. Chem Commun (Camb) 2021; 57:2487-2490. [PMID: 33616595 DOI: 10.1039/d1cc00553g] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Metal-responsive triplex-forming oligonucleotides (TFOs) were synthesised by incorporating 5-hydroxyuracil (UOH) nucleobases as metal recognition sites. Binding of the UOH-containing TFO to the target natural DNA duplexes was reversibly regulated by the addition and removal of GdIII ions under isothermal conditions.
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Affiliation(s)
- Kotaro Nishiyama
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Keita Mori
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Yusuke Takezawa
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.
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8
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Baraniak D, Boryski J. Triazole-Modified Nucleic Acids for the Application in Bioorganic and Medicinal Chemistry. Biomedicines 2021; 9:628. [PMID: 34073038 PMCID: PMC8229351 DOI: 10.3390/biomedicines9060628] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/26/2021] [Accepted: 05/26/2021] [Indexed: 02/07/2023] Open
Abstract
This review covers studies which exploit triazole-modified nucleic acids in the range of chemistry and biology to medicine. The 1,2,3-triazole unit, which is obtained via click chemistry approach, shows valuable and unique properties. For example, it does not occur in nature, constitutes an additional pharmacophore with attractive properties being resistant to hydrolysis and other reactions at physiological pH, exhibits biological activity (i.e., antibacterial, antitumor, and antiviral), and can be considered as a rigid mimetic of amide linkage. Herein, it is presented a whole area of useful artificial compounds, from the clickable monomers and dimers to modified oligonucleotides, in the field of nucleic acids sciences. Such modifications of internucleotide linkages are designed to increase the hybridization binding affinity toward native DNA or RNA, to enhance resistance to nucleases, and to improve ability to penetrate cell membranes. The insertion of an artificial backbone is used for understanding effects of chemically modified oligonucleotides, and their potential usefulness in therapeutic applications. We describe the state-of-the-art knowledge on their implications for synthetic genes and other large modified DNA and RNA constructs including non-coding RNAs.
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Affiliation(s)
- Dagmara Baraniak
- Institute of Bioorganic Chemistry, Polish Academy of Sciences, Noskowskiego 12/14, 61-704 Poznan, Poland;
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9
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Ariga K, Shionoya M. Nanoarchitectonics for Coordination Asymmetry and Related Chemistry. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2021. [DOI: 10.1246/bcsj.20200362] [Citation(s) in RCA: 56] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Katsuhiko Ariga
- World Premier International (WPI) Research Centre for Materials Nanoarchitectonics (MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044, Japan
- Department of Advanced Materials Science, Graduate School of Frontier Sciences, The University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8561, Japan
| | - Mitsuhiko Shionoya
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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Brylev VA, Ustinov AV, Tsvetkov VB, Barinov NA, Aparin IO, Sapozhnikova KA, Berlina YY, Kokin EA, Klinov DV, Zatsepin TS, Korshun VA. Toehold-Mediated Selective Assembly of Compact Discrete DNA Nanostructures. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:15119-15127. [PMID: 33264013 DOI: 10.1021/acs.langmuir.0c02696] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Production of small discrete DNA nanostructures containing covalent junctions requires reliable methods for the synthesis and assembly of branched oligodeoxynucleotide (ODN) conjugates. This study reports an approach for self-assembly of hard-to-obtain primitive discrete DNA nanostructures-"nanoethylenes", dimers formed by double-stranded oligonucleotides using V-shaped furcate blocks. We scaled up the synthesis of V-shaped oligonucleotide conjugates using pentaerythritol-based diazide and alkyne-modified oligonucleotides using copper(I)-catalyzed azide-alkyne cycloaddition (CuAAC) and optimized the conditions for "nanoethylene" formation. Next, we designed nanoethylene-based "nanomonomers" containing pendant adapters. They demonstrated smooth and high-yield spontaneous conversion into the smallest cyclic product, DNA tetragon aka "nano-methylcyclobutane". Formation of DNA nanostructures was confirmed using native polyacrylamide gel electrophoresis (PAGE) and atomic force microscopy (AFM) and additionally studied by molecular modeling. The proposed facile approach to discrete DNA nanostructures using precise adapter-directed association expands the toolkit for the realm of DNA origami.
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Affiliation(s)
- Vladimir A Brylev
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Alexey V Ustinov
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Department of Biology and Biotechnology, Higher School of Economics, Vavilova 7, 117312 Moscow, Russia
| | - Vladimir B Tsvetkov
- Federal Research and Clinical Center of Physico-Chemical Medicine, Malaya Pirogovskaya 1a, 119435 Moscow, Russia
- Computational Oncology Group, I.M. Sechenov First Moscow State Medical University, Trubetskaya str, 8/2, 119146 Moscow, Russia
- A.V. Topchiev Institute of Petrochemical Synthesis of Russian Academy of Sciences, Leninsky Prospect str. 29, 119991 Moscow, Russia
| | - Nikolay A Barinov
- Federal Research and Clinical Center of Physico-Chemical Medicine, Malaya Pirogovskaya 1a, 119435 Moscow, Russia
| | - Ilya O Aparin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Ksenia A Sapozhnikova
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
| | - Yana Y Berlina
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Department of Chemistry, Moscow State University, 1-3 Leninskiye Gory, 119991 Moscow, Russia
| | - Egor A Kokin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Department of Biology, Moscow State University, 1-12 Leninskie Gory, 119991 Moscow, Russia
| | - Dmitry V Klinov
- Federal Research and Clinical Center of Physico-Chemical Medicine, Malaya Pirogovskaya 1a, 119435 Moscow, Russia
| | - Timofei S Zatsepin
- Department of Chemistry, Moscow State University, 1-3 Leninskiye Gory, 119991 Moscow, Russia
- Skolkovo Institute of Science and Technology, Skolkovo, 143026 Moscow, Russia
| | - Vladimir A Korshun
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia
- Department of Biology and Biotechnology, Higher School of Economics, Vavilova 7, 117312 Moscow, Russia
- Gause Institute of New Antibiotics, Bolshaya Pirogovskaya 11, 119021 Moscow, Russia
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Madhanagopal BR, Kumar J, Ganesh KN. Silver assisted stereo-directed assembly of branched peptide nucleic acids into four-point nanostars. NANOSCALE 2020; 12:21665-21673. [PMID: 33094774 DOI: 10.1039/d0nr05471b] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Branched chiral peptide nucleic acids br(4S/R)-PNA with three arms of PNA-C4 strands were constructed on a central chiral core of 4(R/S)-aminoproline as the branching center. The addition of Ag+ triggered the self-assembly of branched PNAs through the formation of C-Ag+-C metallo base pairing of the three PNA C4 arms leading to non-covalent dendrimers, whose architecture is directed by the C4(R/S)-stereocenter of core 4-aminoproline. The 4S-aminoprolyl core enabled the precise formation of four-pointed nanostars that was not realised with 4R-aminoprolyl or acyclic, achiral aminoethyl glycyl PNA cores. The dendritic assembly of 4 pointed nanostars exhibited net chirality of base stacks in CD spectra, while the base stack assembly from br(4R)-PNA 2 was overall achiral. The results demonstrate that the silver assisted, 4S-aminoproline core stereo selective chiral assembly of branched PNAs manifests into nanostar morphology. The chiral branched PNAs open new vistas in the supramolecular organization of nucleic acids.
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Affiliation(s)
- Bharath Raj Madhanagopal
- Indian Institute of Science Education and Research (IISER) Tirupati, Karkambadi Road, Tirupati 517507, Andhra Pradesh, India.
| | - Jatish Kumar
- Indian Institute of Science Education and Research (IISER) Tirupati, Karkambadi Road, Tirupati 517507, Andhra Pradesh, India.
| | - Krishna N Ganesh
- Indian Institute of Science Education and Research (IISER) Tirupati, Karkambadi Road, Tirupati 517507, Andhra Pradesh, India. and Indian Institute of Science Education and Research (IISER) Pune, Dr Homi Bhabha Road, Pune 411008, Maharashtra, India
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