1
|
Nakano SI, Oka H, Fujii M, Sugimoto N. Use of a Ureido-Substituted Deoxycytidine Module for DNA Assemblies. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2016; 35:370-8. [PMID: 27152551 DOI: 10.1080/15257770.2016.1174262] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Ureido-substituted cytosine derivatives are promising for constructing self-assembly structures that can be applied to nanotechnology research. However, conventional cytosine modules achieve assembly in organic solvents. In this study, an N-phenylcarbamoyl deoxycytidine nucleoside was incorporated into a C-rich oligonucleotide to achieve self-assembly in aqueous solution. The results show that the capability of the module to form DNA assemblies varied depending on the number of modules incorporated. The deoxycytidine derivative has a potential application in the development of smart materials based on DNA assembly.
Collapse
Affiliation(s)
- Shu-Ichi Nakano
- a Department of Nanobiochemistry , Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , Kobe , Japan
| | - Hirohito Oka
- b Department of Chemistry , Faculty of Science and Engineering, Konan University , Kobe , Japan
| | - Masayuki Fujii
- c Molecular Engineering Institute (MEI), Kinki University , Fukuoka , Japan.,d Department of Environmental and Biological Chemistry , Kinki University , Fukuoka , Japan
| | - Naoki Sugimoto
- a Department of Nanobiochemistry , Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University , Kobe , Japan.,e Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University , Kobe , Japan
| |
Collapse
|
2
|
Roles of the amino group of purine bases in the thermodynamic stability of DNA base pairing. Molecules 2014; 19:11613-27. [PMID: 25100254 PMCID: PMC6271411 DOI: 10.3390/molecules190811613] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/28/2014] [Accepted: 07/31/2014] [Indexed: 01/19/2023] Open
Abstract
The energetic aspects of hydrogen-bonded base-pair interactions are important for the design of functional nucleotide analogs and for practical applications of oligonucleotides. The present study investigated the contribution of the 2-amino group of DNA purine bases to the thermodynamic stability of oligonucleotide duplexes under different salt and solvent conditions, using 2'-deoxyriboinosine (I) and 2'-deoxyribo-2,6-diaminopurine (D) as non-canonical nucleotides. The stability of DNA duplexes was changed by substitution of a single base pair in the following order: G•C > D•T ≈ I•C > A•T > G•T > I•T. The apparent stabilization energy due to the presence of the 2-amino group of G and D varied depending on the salt concentration, and decreased in the water-ethanol mixed solvent. The effects of salt concentration on the thermodynamics of DNA duplexes were found to be partially sequence-dependent, and the 2-amino group of the purine bases might have an influence on the binding of ions to DNA through the formation of a stable base-paired structure. Our results also showed that physiological salt conditions were energetically favorable for complementary base recognition, and conversely, low salt concentration media and ethanol-containing solvents were effective for low stringency oligonucleotide hybridization, in the context of conditions employed in this study.
Collapse
|
3
|
Nakano SI, Uotani Y, Sato Y, Oka H, Fujii M, Sugimoto N. Conformational changes of the phenyl and naphthyl isocyanate-DNA adducts during DNA replication and by minor groove binding molecules. Nucleic Acids Res 2013; 41:8581-90. [PMID: 23873956 PMCID: PMC3794578 DOI: 10.1093/nar/gkt608] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
DNA lesions produced by aromatic isocyanates have an extra bulky group on the nucleotide bases, with the capability of forming stacking interaction within a DNA helix. In this work, we investigated the conformation of the 2′-deoxyadenosine and 2′-deoxycytidine derivatives tethering a phenyl or naphthyl group, introduced in a DNA duplex. The chemical modification experiments using KMnO4 and 1-cyclohexyl-3 -(2-morpholinoethyl) carbodiimide metho-p-toluenesulfonate have shown that the 2′-deoxycytidine lesions form the base pair with guanine while the 2′-deoxyadenosine lesions have less ability of forming the base pair with thymine in solution. Nevertheless, the kinetic analysis shows that these DNA lesions are compatible with DNA ligase and DNA polymerase reactions, as much as natural DNA bases. We suggest that the adduct lesions have a capability of adopting dual conformations, depending on the difference in their interaction energies between stacking of the attached aromatic group and base pairing through hydrogen bonds. It is also presented that the attached aromatic groups change their orientation by interacting with the minor groove binding netropsin, distamycin and synthetic polyamide. The nucleotide derivatives would be useful for enhancing the phenotypic diversity of DNA molecules and for exploring new non-natural nucleotides.
Collapse
Affiliation(s)
- Shu-ichi Nakano
- Department of Nanobiochemistry, Faculty of Frontiers of Innovative Research in Science and Technology (FIRST), Konan University, 7-1-20, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan, Frontier Institute for Biomolecular Engineering Research (FIBER), Konan University, 7-1-20, Minatojima-minamimachi, Chuo-ku, Kobe, 650-0047, Japan, Department of Chemistry, Faculty of Science and Engineering, Konan University, 8-9-1, Okamoto, Higashinada-ku, Kobe, 658-8501, Japan, Molecular Engineering Institute (MEI), Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka, 820-8555, Japan and Department of Environmental and Biological Chemistry, Kinki University, 11-6 Kayanomori, Iizuka, Fukuoka, 820-8555, Japan
| | | | | | | | | | | |
Collapse
|