Structurally specific thermal fluctuations identify functional sites for DNA transcription

TL;DR

This study shows that specific thermal fluctuations in DNA structure correlate with functional sites for transcription, highlighting the role of dynamics, nonlinearity, and entropy in gene regulation.

Contribution

It demonstrates that coherent thermal fluctuations and local base-pair constraints identify key transcription sites in DNA, advancing understanding of transcription initiation mechanisms.

Findings

Openings occur predominantly at transcription start sites

Minor openings relate to regulatory sites

Thermal fluctuations influence transcription initiation

Abstract

We report results showing that thermally-induced openings of double stranded DNA coincide with the location of functionally relevant sites for transcription. Investigating both viral and bacterial DNA gene promoter segments, we found that the most probable opening occurs at the transcription start site. Minor openings appear to be related to other regulatory sites. Our results suggest that coherent thermal fluctuations play an important role in the initiation of transcription. Essential elements of the dynamics, in addition to sequence specificity, are nonlinearity and entropy, provided by local base-pair constraints.