1
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Garavís M, Edwards PJB, Serrano-Chacón I, Doluca O, Filichev V, González C. Understanding intercalative modulation of G-rich sequence folding: solution structure of a TINA-conjugated antiparallel DNA triplex. Nucleic Acids Res 2024; 52:2686-2697. [PMID: 38281138 PMCID: PMC10954471 DOI: 10.1093/nar/gkae028] [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] [Received: 06/22/2023] [Revised: 12/21/2023] [Accepted: 01/06/2024] [Indexed: 01/30/2024] Open
Abstract
We present here the high-resolution structure of an antiparallel DNA triplex in which a monomer of para-twisted intercalating nucleic acid (para-TINA: (R)-1-O-[4-(1-pyrenylethynyl)phenylmethyl]glycerol) is covalently inserted as a bulge in the third strand of the triplex. TINA is a potent modulator of the hybridization properties of DNA sequences with extremely useful properties when conjugated in G-rich oligonucleotides. The insertion of para-TINA between two guanines of the triplex imparts a high thermal stabilization (ΔTM = 9ºC) to the structure and enhances the quality of NMR spectra by increasing the chemical shift dispersion of proton signals near the TINA location. The structural determination reveals that TINA intercalates between two consecutive triads, causing only local distortions in the structure. The two aromatic moieties of TINA are nearly coplanar, with the phenyl ring intercalating between the flanking guanine bases in the sequence, and the pyrene moiety situated between the Watson-Crick base pair of the two first strands. The precise position of TINA within the triplex structure reveals key TINA-DNA interactions, which explains the high stabilization observed and will aid in the design of new and more efficient binders to DNA.
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Affiliation(s)
- Miguel Garavís
- Instituto de Química Física ‘Blas Cabrera’, (IQF-CSIC), Madrid 28006, Spain
| | - Patrick J B Edwards
- School of Natural Sciences, Massey University, Palmerston North 4412, New Zealand
| | | | - Osman Doluca
- School of Natural Sciences, Massey University, Palmerston North 4412, New Zealand
| | | | - Carlos González
- Instituto de Química Física ‘Blas Cabrera’, (IQF-CSIC), Madrid 28006, Spain
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2
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Zhang Q, Yang T, Zheng G, Gao H, Yan C, Zheng X, Zhou X, Shao Y. Characterization of intermolecular G-quadruplex formation over intramolecular G-triplex for DNA containing three G-tracts. Analyst 2021; 145:4254-4259. [PMID: 32478785 DOI: 10.1039/d0an00791a] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
G-triplex (G3) has been recognized as a popular intermediate during the folding of G-quadruplex (G4). This has raised interest to anticipate the ultimate formation of G3 by shortening the G4-forming oligonucleotides with the remaining three G-tracts. Some G3 structures have been validated and their stability has been found to be affected by the loop sequences similar to G4s. In this work, however, we first found that an intermolecular parallel G4 structure was preferred in K+ for the oligonucleotide 5'-TGGGTAGGGCGGG-3' (DZ3) containing only three G-tracts. We screened auramine O (AO) as the appropriate fluorophore with a molecular rotor feature to target this G4 structure. AO bound with DZ3 in a 1 : 4 ratio, as confirmed by isothermal titration calorimetry experiments, suggesting the formation of a tetramolecular G4 structure (4erG4). The excimer emission from the labelled pyrene and the DNA melting behavior at various pHs in the presence of Ag+ proved the formation of the 4erG4 structure rather than the prevalent intramolecular G3 folding. This work demonstrates that one should be cautious while putatively predicting a G3 structure from an oligonucleotide containing three G-tracts.
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Affiliation(s)
- Qingqing Zhang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Tong Yang
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Guoxiang Zheng
- Undergraduate Teaching Department, Zhejiang Normal University, Jinhua 321004, Zhejiang, China
| | - Heng Gao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Chenxiao Yan
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Xiong Zheng
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Xiaoshun Zhou
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
| | - Yong Shao
- Key Laboratory of the Ministry of Education for Advanced Catalysis Materials, Institute of Physical Chemistry, College of Chemistry and Life Sciences, Zhejiang Normal University, Jinhua 321004, Zhejiang, China.
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3
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Design and Properties of Ligand-Conjugated Guanine Oligonucleotides for Recovery of Mutated G-Quadruplexes. Molecules 2018; 23:molecules23123228. [PMID: 30563296 PMCID: PMC6321378 DOI: 10.3390/molecules23123228] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 11/27/2018] [Accepted: 12/05/2018] [Indexed: 11/17/2022] Open
Abstract
The formation of a guanine quadruplex DNA structure (G4) is known to repress the expression of certain cancer-related genes. Consequently, a mutated G4 sequence can affect quadruplex formation and induce cancer progression. In this study, we developed an oligonucleotide derivative consisting of a ligand-containing guanine tract that replaces the mutated G4 guanine tract at the promoter of the vascular endothelial growth factor (VEGF) gene. A ligand moiety consisting of three types of polyaromatic hydrocarbons, pyrene, anthracene, and perylene, was attached to either the 3' or 5' end of the guanine tract. Each of the ligand-conjugated guanine tracts, with the exception of anthracene derivatives, combined with other intact guanine tracts to form an intermolecular G4 on the mutated VEGF promoter. This intermolecular G4, exhibiting parallel topology and high thermal stability, enabled VEGF G4 formation to be recovered from the mutated sequence. Stability of the intramolecular G4 increased with the size of the conjugated ligand. However, suppression of intermolecular G4 replication was uniquely dependent on whether the ligand was attached to the 3' or 5' end of the guanine tract. These results indicate that binding to either the top or bottom guanine quartet affects unfolding kinetics due to polarization in DNA polymerase processivity. Our findings provide a novel strategy for recovering G4 formation in case of damage, and fine-tuning processes such as replication and transcription.
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4
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Takahashi S, Kim KT, Podbevšek P, Plavec J, Kim BH, Sugimoto N. Recovery of the Formation and Function of Oxidized G-Quadruplexes by a Pyrene-Modified Guanine Tract. J Am Chem Soc 2018; 140:5774-5783. [PMID: 29608858 DOI: 10.1021/jacs.8b01577] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oxidation is one of the frequent causes of DNA damage, especially to guanine bases. Guanine bases in the G-quadruplex (G4) are sensitive to damage by oxidation, resulting in transformation to 8-oxo-7,8-dihydroguanine (8-oxoG). Because the formation of G4 represses the expression of some cancer-related genes, the presence of 8-oxoG in a G4 sequence might affect G4 formation and induce cancer progression. Thus, oxidized-G4 formation must be controlled using a chemical approach. In the present study, we investigated the effect of introduction of 8-oxoG into a G4 sequence on the formation and function of the G4 structure. The 8-oxoG-containing G4 derived from the promoter region of the human vascular endothelial growth factor ( VEGF) gene differed topologically from unoxidized G4. The oxidized VEGF G4 did not act as a replication block and was not stabilized by the G4-binding protein nucleolin. To recover G4 function, we developed an oligonucleotide consisting of a pyrene-modified guanine tract that replaces the oxidized guanine tract and forms stable intermolecular G4s with the other intact guanine tracts. When this oligonucleotide was used, the oxidized G4 stalled replication and was stabilized by nucleolin as with the unmodified G4. This strategy generally enables recovery of the function of any oxidized G4s and therefore has potential for cancer therapy.
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Affiliation(s)
| | - Ki Tae Kim
- Department of Chemistry, Division of Advanced Materials Science , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea
| | - Peter Podbevšek
- Slovenian NMR Center , National Institute of Chemistry , SI-1000 Ljubljana , Slovenia
| | - Janez Plavec
- Slovenian NMR Center , National Institute of Chemistry , SI-1000 Ljubljana , Slovenia
| | - Byeang Hyean Kim
- Department of Chemistry, Division of Advanced Materials Science , Pohang University of Science and Technology (POSTECH) , Pohang 37673 , Republic of Korea
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5
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Li Z, Zhu J, He J. Conformational studies of 10-23 DNAzyme in solution through pyrenyl-labeled 2'-deoxyadenosine derivatives. Org Biomol Chem 2018; 14:9846-9858. [PMID: 27714317 DOI: 10.1039/c6ob01702a] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
10-23 DNAzyme is a small catalytic DNA molecule. Studies on its conformation in solution are critical for understanding its catalytic mechanism and functional optimization. Based on our previous research, two fluorescent nucleoside analogues 1 and 2 were designed for the introduction of a pyrenyl group at one of the five dA residues in the catalytic core and the unpaired adenosine residue in its full-DNA substrate, respectively. Ten pyrenyl-pyrenyl pairs are formed in the DNAzyme-substrate complexes in solution for sensing the spacial positions of the five dA residues relative to the cleavage site using fluorescence spectra. The position-dependent quenching effect of pyrene emission fluorescence by nucleobases, especially the pyrenyl-pyrenyl interaction, was observed for some positions. The adenine residues in the 3'-part of the catalytic loop seem to be closer to the cleavage site than the adenine residues in the 5'-part, which is consistent with the molecular dynamics simulation result. The catalytic activities and Tm changes also confirmed the effect of the pyrenyl-nucleobase and pyrenyl-pyrenyl pair interactions. Together with functional group mutations, catalytically relevant nucleobases will be identified for understanding the catalytic mechanism of 10-23 DNAzyme.
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Affiliation(s)
- Zhiwen Li
- College of Life Science, Guizhou University, Guiyang 550025, China
| | - Junfei Zhu
- College of Life Science, Guizhou University, Guiyang 550025, China
| | - Junlin He
- Beijing Institute of Pharmacology and Toxicology, Beijing 100850, China.
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6
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Park Y, Kim KT, Kim BH. G-Quadruplex formation using fluorescent oligonucleotides as a detection method for discriminating AGG trinucleotide repeats. Chem Commun (Camb) 2018; 52:12757-12760. [PMID: 27722273 DOI: 10.1039/c6cc06566j] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
We have developed a simple and sensitive system for detecting AGG trinucleotide repeats through the formation of intermolecular G-quadruplexes using a fluorescent oligonucleotide. The fluorescence signal increased rapidly and dramatically by 44.7-fold with respect to the low background signal in the presence of RNA agg repeats and by 35.0-fold in the presence of DNA AGG repeats.
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Affiliation(s)
- Yoojin Park
- Department of Chemistry, Division of Advanced Materials Science, Pohang University of Science and Technology (POSTEH), Pohang 37673, Republic of Korea.
| | - Ki Tae Kim
- Department of Chemistry, Division of Advanced Materials Science, Pohang University of Science and Technology (POSTEH), Pohang 37673, Republic of Korea.
| | - Byeang Hyean Kim
- Department of Chemistry, Division of Advanced Materials Science, Pohang University of Science and Technology (POSTEH), Pohang 37673, Republic of Korea.
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7
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Krasheninina OA, Novopashina DS, Apartsin EK, Venyaminova AG. Recent Advances in Nucleic Acid Targeting Probes and Supramolecular Constructs Based on Pyrene-Modified Oligonucleotides. Molecules 2017; 22:E2108. [PMID: 29189716 PMCID: PMC6150046 DOI: 10.3390/molecules22122108] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 11/28/2017] [Accepted: 11/28/2017] [Indexed: 12/17/2022] Open
Abstract
In this review, we summarize the recent advances in the use of pyrene-modified oligonucleotides as a platform for functional nucleic acid-based constructs. Pyrene is of special interest for the development of nucleic acid-based tools due to its unique fluorescent properties (sensitivity of fluorescence to the microenvironment, ability to form excimers and exciplexes, long fluorescence lifetime, high quantum yield), ability to intercalate into the nucleic acid duplex, to act as a π-π-stacking (including anchoring) moiety, and others. These properties of pyrene have been used to construct novel sensitive fluorescent probes for the sequence-specific detection of nucleic acids and the discrimination of single nucleotide polymorphisms (SNPs), aptamer-based biosensors, agents for binding of double-stranded DNAs, and building blocks for supramolecular complexes. Special attention is paid to the influence of the design of pyrene-modified oligonucleotides on their properties, i.e., the structure-function relationships. The perspectives for the applications of pyrene-modified oligonucleotides in biomolecular studies, diagnostics, and nanotechnology are discussed.
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Affiliation(s)
- Olga A Krasheninina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Acad. Lavrentiev Ave. 8, Novosibirsk 630090, Russia.
| | - Darya S Novopashina
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Acad. Lavrentiev Ave. 8, Novosibirsk 630090, Russia.
| | - Evgeny K Apartsin
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Acad. Lavrentiev Ave. 8, Novosibirsk 630090, Russia.
| | - Alya G Venyaminova
- Institute of Chemical Biology and Fundamental Medicine SB RAS, Acad. Lavrentiev Ave. 8, Novosibirsk 630090, Russia.
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8
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Astakhova K, Golovin AV, Prokhorenko IA, Ustinov AV, Stepanova IA, Zatsepin TS, Korshun VA. Design of 2′-phenylethynylpyrene excimer forming DNA/RNA probes for homogeneous SNP detection: The attachment manner matters. Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.04.045] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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9
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Abstract
![]()
DNA is well-known as bearer of the genetic code.
Since its structure
elucidation nearly seven decades ago by Watson, Crick, Wilkins, and
Franklin, much has been learned about its detailed structure, function,
and genetic coding. The development of automated solid-phase synthesis,
and with it the availability of synthetic DNA with any desired sequence
in lengths of up to hundreds of bases in the best case, has contributed
much to the advancement of the field of DNA research. In addition,
classic organic synthesis has allowed introduction of a very large
number of modifications in the DNA in a sequence specific manner,
which have initially been targeted at altering the biological function
of DNA. However, in recent years DNA has become a very attractive
scaffold in supramolecular chemistry, where DNA is taken out of its
biological role and serves as both stick and glue molecule to assemble
novel functional structures with nanometer precision. The attachment
of functionalities to DNA has led to the creation of supramolecular
systems with applications in light harvesting, energy and electron
transfer, sensing, and catalysis. Functional DNA is clearly having
a significant impact in the field of bioinspired nanosystems. Of particular interest is the use of porphyrins in supramolecular
chemistry and bionanotechnology, because they are excellent functional
groups due to their electronic properties that can be tailored through
chemical modifications of the aromatic core or through insertion of
almost any metal of the periodic table into the central cavity. The
porphyrins can be attached either to the nucleobase, to the phosphate
group, or to the ribose moiety. Additionally, noncovalent templating
through Watson–Crick base pairing forms an alternative and
attractive approach. With this, the combination of two seemingly simple
molecules gives rise to a highly complex system with unprecedented
possibilities for modulation of function, and with it applications,
particularly when combined with other functional groups. Here, an
overview is given on the developments of using porphyrin modified
DNA for the construction of functional assemblies. Strategies for
the synthesis and characterization are presented alongside selected
applications where the porphyrin modification has proven to be particularly
useful and superior to other modifiers but also has revealed its limitations.
We also discuss implications on properties and behavior of the porphyrin–DNA,
where similar issues could arise when using other hydrophobic and
bulky substituents on DNA. This includes particularly problems regarding
synthesis of the building blocks, DNA synthesis, yields, solubility,
and intermolecular interactions.
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Affiliation(s)
- Eugen Stulz
- School of Chemistry & Institute for Life Sciences, University of Southampton, Highfield, Southampton SO17 1BJ, U.K
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10
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Fatthalla MI, Pedersen EB. Unexpected Hydration of a Triple Bond During DNA Synthesis: Conjugating 3-(Pyren-1-ylethynyl)indole to DNA for Triplex Studies. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600287] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Maha I. Fatthalla
- Department of Physics; Chemistry and Pharmacy University of Southern Denmark; Campusvej 55 5230 Odense M Denmark
- Department of Chemistry; Faculty of Science; Helwan University; 11795 Ain Helwan, Cairo Egypt
| | - Erik B. Pedersen
- Department of Physics; Chemistry and Pharmacy University of Southern Denmark; Campusvej 55 5230 Odense M Denmark
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11
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Mutsamwira S, Ainscough EW, Partridge AC, Derrick PJ, Filichev VV. G-Quadruplex Supramolecular Assemblies in Photochemical Upconversion. Chemistry 2016; 22:10376-81. [DOI: 10.1002/chem.201601353] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 05/04/2016] [Indexed: 12/25/2022]
Affiliation(s)
- Saymore Mutsamwira
- Institute of Fundamental Sciences; Massey University; Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Eric W. Ainscough
- Institute of Fundamental Sciences; Massey University; Private Bag 11 222 Palmerston North 4442 New Zealand
| | - Ashton C. Partridge
- Institute of Fundamental Sciences; Massey University; Private Bag 11 222 Palmerston North 4442 New Zealand
- Department of Physics and School of Engineering; The University of Auckland; 20 Symonds Street Auckland New Zealand
| | - Peter J. Derrick
- Institute of Fundamental Sciences; Massey University; Private Bag 11 222 Palmerston North 4442 New Zealand
- Department of Physics and School of Engineering; The University of Auckland; 20 Symonds Street Auckland New Zealand
| | - Vyacheslav V. Filichev
- Institute of Fundamental Sciences; Massey University; Private Bag 11 222 Palmerston North 4442 New Zealand
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12
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Aparin IO, Farzan VM, Veselova OA, Chistov AA, Podkolzin AT, Ustinov AV, Shipulin GA, Formanovsky AA, Korshun VA, Zatsepin TS. 1-Phenylethynylpyrene (PEPy) as a novel blue-emitting dye for qPCR assay. Analyst 2016; 141:1331-8. [PMID: 26738806 DOI: 10.1039/c5an01767j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
An alkyl azide derivative of 1-phenylethynylpyrene (PEPy) dye was prepared and used in the functionalization of oligonucleotides via click chemistry. Spectral and photo-physical properties of the PEPy-modified oligonucleotides as a single strand, and in perfect or mismatched duplexes, have been studied. A series of PEPy-Dabcyl fluorogenic TaqMan probes were synthesized and tested in qPCR. PEPy proved to be a superior substitute for AMCA as a short wavelength fluorescent dye for qPCR probes. PEPy probes were shown to significantly reduce Cq (a fractional PCR cycle used for quantification) vs. AMCA labeled probes, thus improving on the reliability of detection. Moreover, a larger increase of fluorescence during amplification was observed in the case of PEPy probes that makes this dye very suitable for an end-point PCR technique. This study broadens the panel of fluorescent dyes suitable for the use in probes for quantitative real-time PCR.
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Affiliation(s)
- Ilya O Aparin
- Shemyakin-Ovchinnikov Institute of Bioorganic Chemistry, Miklukho-Maklaya 16/10, 117997 Moscow, Russia.
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13
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Singleton DG, Hussain R, Siligardi G, Kumar P, Hrdlicka PJ, Berova N, Stulz E. Increased duplex stabilization in porphyrin-LNA zipper arrays with structure dependent exciton coupling. Org Biomol Chem 2016; 14:149-57. [PMID: 26416024 PMCID: PMC4766578 DOI: 10.1039/c5ob01681a] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/18/2015] [Indexed: 12/23/2022]
Abstract
Porphyrins were attached to LNA uridine building blocks via rigid 5-acetylene or more flexible propargyl-amide linkers and incorporated into DNA strands. The systems show a greatly increased thermodynamic stability when using as little as three porphyrins in a zipper arrangement. Thermodynamic analysis reveals clustering of the strands into more ordered duplexes with both greater negative ΔΔS and ΔΔH values, and less ordered duplexes with small positive ΔΔS differences, depending on the combination of linkers used. The exciton coupling between the porphyrins is dependent on the flanking DNA sequence in the single stranded form, and on the nature of the linker between the nucleobase and the porphyrin in the double stranded form; it is, however, also strongly influenced by intermolecular interactions. This system is suitable for the formation of stable helical chromophore arrays with sequence and structure dependent exciton coupling.
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Affiliation(s)
- Daniel G. Singleton
- School of Chemistry and Institute for Life Sciences , University of Southampton , Highfield , Southampton , SO17 1BJ , UK . ; http://www.southampton.ac.uk/chemistry/about/staff/est.page?
| | - Rohanah Hussain
- Diamond Light Source , Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 0DE , UK
| | - Giuliano Siligardi
- Diamond Light Source , Harwell Science and Innovation Campus , Didcot , Oxfordshire OX11 0DE , UK
| | - Pawan Kumar
- Department of Chemistry , University of Idaho , Moscow , ID 83844 , USA
| | | | - Nina Berova
- Department of Chemistry , Columbia University , 3000 Broadway , New York , NY 10027 , USA
| | - Eugen Stulz
- School of Chemistry and Institute for Life Sciences , University of Southampton , Highfield , Southampton , SO17 1BJ , UK . ; http://www.southampton.ac.uk/chemistry/about/staff/est.page?
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14
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Mondal S, Bhat J, Jana J, Mukherjee M, Chatterjee S. Reverse Watson–Crick G–G base pair in G-quadruplex formation. MOLECULAR BIOSYSTEMS 2016; 12:18-22. [DOI: 10.1039/c5mb00611b] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cisplatin binds to N7 of guanine in a reverse Watson–Crick G–G pair.
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Affiliation(s)
- Soma Mondal
- Bose Institute
- Centenary Campus
- Department of Biophysics
- Kolkata-54
- India
| | - Jyotsna Bhat
- Bose Institute
- Centenary Campus
- Department of Biophysics
- Kolkata-54
- India
| | - Jagannath Jana
- Bose Institute
- Centenary Campus
- Department of Biophysics
- Kolkata-54
- India
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15
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Mutsamwira S, Ainscough EW, Partridge AC, Derrick PJ, Filichev VV. DNA-Based Assemblies for Photochemical Upconversion. J Phys Chem B 2015; 119:14045-52. [DOI: 10.1021/acs.jpcb.5b07489] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Saymore Mutsamwira
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
| | - Eric W. Ainscough
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
| | - Ashton C. Partridge
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
- Department
of Physics and School of Engineering, The University of Auckland, 20 Symonds Street, Auckland 1010, New Zealand
| | - Peter J. Derrick
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
- Department
of Physics and School of Engineering, The University of Auckland, 20 Symonds Street, Auckland 1010, New Zealand
| | - Vyacheslav V. Filichev
- Institute
of Fundamental Sciences, Massey University, Private Bag 11-222, Palmerston North 4442, New Zealand
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