Download Mendeley3D Hexagonal Arrangement of DNA Tensegrity Triangles.
Lu, B., Vecchioni, S., Ohayon, Y.P., Sha, R., Woloszyn, K., Yang, B., Mao, C., Seeman, N.C.(2021) ACS Nano 15: 16788-16793
- PubMed: 34609128
- DOI: https://doi.org/10.1021/acsnano.1c06963
- Primary Citation of Related Structures:
7R96 - PubMed Abstract:
The tensegrity triangle motif utilizes Watson-Crick sticky end cohesion to self-assemble into a rhombohedral crystal lattice using complementary 5'-GA and 5'-TC sticky ends. Here, we report that using noncanonical 5'-AG and 5'-TC sticky ends in otherwise isomorphic tensegrity triangles results in crystal self-assembly in the P 6 3 hexagonal space group as revealed by X-ray crystallography. In this structure, the DNA double helices bend at the crossover positions, a feature that was not observed in the original design. Instead of propagating linearly, the tilt between base pairs of each right-handed helix results in a left-handed superstructure along the screw axis, forming a microtubule-like structure composed of three double helices with an unbroken channel at the center. This hexagonal lattice has a cavity diameter of 11 nm and a unit cell volume of 886 000 Å 3 -far larger than the rhombohedral counterpart (5 nm, 330 000 Å 3 ).
Organizational Affiliation:
Department of Chemistry, New York University, New York, New York 10003, United States.
