Comparative Electrostatic Force Microscopy of Tetra- and Intra-Molecular G4-DNA

TL;DR

This study uses atomic force microscopy to compare the structural and electrical properties of two G4-DNA forms, revealing that parallel G4-DNA has higher polarizability and potential for bio-nanoelectronic applications.

Contribution

It provides the first comparative electrostatic force microscopy analysis of parallel and anti-parallel G4-DNA structures, linking strand orientation to electrical properties.

Findings

Parallel G4-DNA is twice as polarizable as anti-parallel G4-DNA.

Strand directionality influences molecular height and length.

Parallel G4-DNA shows promise as an electrical wire in bio-nanoelectronics.

Abstract

Two forms of G4-DNA, with parallel and pairwise anti-parallel strands, are studied using atomic force microscopy. The directionality of the strands affects the molecules' structural properties (different height and length) and their electrical polarizability. Parallel G4-DNA is twice as polarizable as anti-parallel G4-DNA, suggesting it is a better electrical wire for bio-nanoelectronics.