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Appearance of de Gennes length in force-induced transitions

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dc.contributor.authorChauhan, Keerti
dc.contributor.authorMishra, Garima
dc.contributor.authorKishore, Vimal
dc.contributor.authorKumar, Sanjay
dc.date.accessioned2025-01-28T09:33:29Z
dc.date.available2025-01-28T09:33:29Z
dc.date.issued2023
dc.description.abstractUsing Langevin dynamic simulations, a simple coarse-grained model of a DNA protein construct is used to study the DNA rupture and the protein unfolding. We identify three distinct states: (i) zipped DNA and collapsed protein, (ii) unzipped DNA and stretched protein, and (iii) unzipped DNA and collapsed protein. Here, we find a phase diagram that shows these states depending on the size of the DNA handle and the protein. For a less stable protein, unfolding is solely governed by the size of the linker DNA, whereas if the protein's stability increases, complete unfolding becomes impossible because the rupture force for DNA has reached a saturation regime influenced by the de Gennes length. We show that unfolding occurs via a few intermediate states by monitoring the force-extension curve of the entire protein. We extend our study to a heterogeneous protein system, where similar intermediate states in two systems can lead to different protein unfolding paths. � 2023 American Physical Society.
dc.identifier.doihttps://doi.org/10.1103/PhysRevE.108.L042501
dc.identifier.issn24700045
dc.identifier.urihttps://dl.bhu.ac.in/ir/handle/123456789/21554
dc.language.isoen
dc.publisherAmerican Physical Society
dc.titleAppearance of de Gennes length in force-induced transitions
dc.typeArticle
dspace.entity.typePublication
journal.titlePhysical Review E
journalvolume.identifier.volume108

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2023