Positive and negative supercoiling represent distinct states of DNA coiling
Positive and negative supercoiling represent distinct states of DNA coiling with unique topological properties, genomic distributions, and biological functions.
The claim is a well-established molecular biology concept supported by recent literature differentiating the roles and locations of positive and negative DNA supercoiling.
Ashish Kumar Singh, Luis Altamirano-Pacheco, Lieng Taing, Agnès Dubois, Pablo Navarro. Topological Regulation of the Mammalian Genome by Positive DNA Supercoiling. 2026. https://doi.org/10.64898/2026.03.10.710740
Paper 2 notes that while negative supercoiling has been extensively studied, positive supercoiling has distinct biological roles and accumulation sites, establishing them as separate topological states.
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Ziqi Fu, Monica S. Guo, Weiqiang Zhou, Jie Xiao. Differential roles of positive and negative supercoiling in organizing the <i>E. coli</i> genome. 2022. https://doi.org/10.1101/2022.12.30.522362
Paper 4 shows that positive and negative supercoiling have differential roles in organizing the genome and distinct effects on spatial contact frequencies.
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