Download MendeleyA cubic arrangement of DNA double helices based on nickel-guanine interactions
Valls, N., Uson, I., Gouyette, C., Subirana, J.A.(2004) J Am Chem Soc 126: 7812-7816
- PubMed: 15212528
- DOI: https://doi.org/10.1021/ja049393i
- Primary Citation of Related Structures:
1S9B - PubMed Abstract:
DNA oligonucleotides can be used in order to assemble highly structured materials. Oligonucleotides with sticky ends can form long linear structures, whereas branching is required to form two- and three-dimensional nanostructures. In this paper, we show that when Ni(2+) is attached to the N7 atom of guanine, it can also act as a branching point. Thus, we have found that the heptanucleotide d(GAATTCG) can assemble into long linear duplex structures, which cross in space to generate a cubic structure. The three-dimensional arrays are stabilized by phosphate-Ni(2+)-guanine interactions. For the first time, the crystallization of a B form DNA oligonucleotide in a cubic system is reported, space group I23. Large solvent cavities are found among the DNA duplexes.
Organizational Affiliation:
Departament d'Enginyeria Química, Universitat Politècnica de Catalunya, Avinguda Diagonal 647, E-08028 Barclelona, Spain.
