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- W2028488968 abstract "Protein-mediated bridging is ubiquitous and essential for shaping cellular structures in all organisms. Here we dissect this mechanism for a model system: the Histone-like Nucleoid-Structuring protein (H-NS). We present data from two complementary single-molecule assays that probe the H-NS-DNA interaction: a dynamic optical-trap-driven unzipping assay and an equilibrium H-NS-mediated DNA looping scanning force microscopy imaging assay. To quantitatively analyze and compare these assays, we employ what we consider a novel theoretical framework that describes the bridging motif. The interplay between the experiments and our theoretical model not only infers the effective interaction free energy, the bridging conformation and the duplex-duplex spacing, but also reveals a second, unresolved, cis-binding mode that challenges our current understanding of the role of bridging proteins in chromatin structure. We expect that this theoretical framework for describing protein-mediated bridging will be applicable to proteins acting in chromatin and cytoskeletal organization." @default.
- W2028488968 created "2016-06-24" @default.
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- W2028488968 date "2009-10-01" @default.
- W2028488968 modified "2023-10-14" @default.
- W2028488968 title "Protein-Mediated Molecular Bridging: A Key Mechanism in Biopolymer Organization" @default.
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- W2028488968 doi "https://doi.org/10.1016/j.bpj.2009.06.051" @default.
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