Effects of design choices on the stiffness of wireframe DNA origami structures
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2018-09-25
Major/Subject
Mcode
Degree programme
Language
en
Pages
9
9291-9299
9291-9299
Series
ACS Nano, Volume 12, issue 9
Abstract
DNA origami is a powerful method for the creation of 3D nanoscale objects, and in the past few years, interest in wireframe origami designs has increased due to their potential for biomedical applications. In DNA wireframe designs, the construction material is double-stranded DNA, which has a persistence length of around 50 nm. In this work, we study the effect of various design choices on the stiffness versus final size of nanoscale wireframe rods, given the constraints on origami designs set by the DNA origami scaffold size. An initial theoretical analysis predicts two competing mechanisms limiting rod stiffness, whose balancing results in an optimal edge length. For small edge lengths, the bending of the rod's overall frame geometry is the dominant factor, while the flexibility of individual DNA edges has a greater contribution at larger edge lengths. We evaluate our design choices through simulations and experiments and find that the stiffness of the structures increases with the number of sides in the cross-section polygon and that there are indications of an optimal member edge length. We also ascertain the effect of nicked DNA edges on the stiffness of the wireframe rods and demonstrate that ligation of the staple breakpoint nicks reduces the observed flexibility. Our simulations also indicate that the persistence length of wireframe DNA structures significantly decreases with increasing monovalent salt concentration.Description
Keywords
beam theory, DNA nanostructures, DNA origami, oxDNA, persistence length, rigidity, wireframe DNA origami
Other note
Citation
Benson, E, Mohammed, A, Rayneau-Kirkhope, D, Gådin, A, Orponen, P & Högberg, B 2018, ' Effects of design choices on the stiffness of wireframe DNA origami structures ', ACS Nano, vol. 12, no. 9, pp. 9291-9299 . https://doi.org/10.1021/acsnano.8b04148