Answer to Question #64232 in Molecular Biology for Sanjukta Ghosh

Question #64232
Does positive supercoiling promote negative supercoiling in uncoiledDNA? I was reading a paper(for fig): https://www.researchgate.net/publication/6955430_Structural_basis_for_ATP-dependent_DnaA_assembly_and_replication-origin_remodeling Stumbled upon this: As a right-handed ATP-DnaA spiral would be expected to wrap DNA into a positive supercoil, adjacent DNA regions would be subjected to compensatory negative writhe (Fig. 6d, left). Although any superhelical strain generated by DnaA-mediated wrapping would be expected to spread throughout the topological domain that contains the origin, it may preferentially affect the nearby DUE, which is unstable and prone to spontaneous unwinding.
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