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• W2092192926 startingPage "12" @default.
• W2092192926 abstract "Conformational changes of filamin A under stress have been postulated to play crucial roles in signaling pathways of cell responses. Direct observation of conformational changes under stress is beyond the resolution of current experimental techniques. On the other hand, computational studies are mainly limited to either traditional molecular dynamics simulations of short durations and high forces or simulations of simplified models. Here we perform all-atom discrete molecular dynamics (DMD) simulations to study thermally and force-induced unfolding of filamin A. The high conformational sampling efficiency of DMD allows us to observe force-induced unfolding of filamin A Ig domains under physiological forces. The computationally identified critical unfolding forces agree well with experimental measurements. Despite a large heterogeneity in the population of force-induced intermediate states, we find a common initial unfolding intermediate in all the Ig domains of filamin, where the N-terminal strand unfolds. We also study the thermal unfolding of several filamin Ig-like domains. We find that thermally induced unfolding features an early-stage intermediate state similar to the one observed in force-induced unfolding and characterized by the N-terminal strand being unfurled. We propose that the N-terminal strand may act as a conformational switch that unfolds under physiological forces leading to exposure of cryptic binding sites, removal of native binding sites, and modulating the quaternary structure of domains." @default.
• W2092192926 created "2016-06-24" @default.
• W2092192926 creator A5013737207 @default.
• W2092192926 creator A5013765672 @default.
• W2092192926 creator A5033490428 @default.
• W2092192926 creator A5055990368 @default.
• W2092192926 date "2009-05-18" @default.
• W2092192926 modified "2023-10-03" @default.
• W2092192926 title "N-terminal strands of filamin Ig domains act as a conformational switch under biological forces" @default.
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• W2092192926 doi "https://doi.org/10.1002/prot.22479" @default.
• W2092192926 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/2804786" @default.
• W2092192926 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19514078" @default.
• W2092192926 hasPublicationYear "2009" @default.
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