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- W4387113604 abstract "Abstract A prototype of cross-membrane signal transduction is that extracellular binding of cell surface receptors to their ligands induces intracellular signaling cascades. However, much less is known about the process in the opposite direction, called inside-out signaling. Recent studies show that it plays a more important role in regulating the functions of many cell surface receptors than we used to think. In particular, in cadherin-mediated cell adhesion, recent experiments indicate that intracellular binding of the scaffold protein p120-catenin can promote extracellular clustering of cadherin and alter its adhesive function. The underlying mechanism, however, is not well understood. To explore possible mechanisms, we designed a new multiscale simulation procedure. Using all-atom molecular dynamics simulations, we found that the conformational dynamics of the cadherin extracellular region can be altered by the intracellular binding of p120-catenin. More intriguingly, by integrating all-atom simulation results into coarse-grained random sampling, we showed that the altered conformational dynamics of cadherin caused by the binding of p120-catenin can increase the probability of lateral interactions between cadherins on the cell surface. These results suggest that p120-catenin could allosterically regulate the cis-dimerization of cadherin through two mechanisms. First, p120-catenin controls the extracellular conformational dynamics of cadherin. Second, p120-catenin oligomerization can further promote cadherin clustering. Our study, therefore, suggests a mechanistic foundation for the inside-out signaling in cadherin-mediated cell adhesion, while the computational framework can be generally applied to other cross-membrane signal transduction systems." @default.
- W4387113604 created "2023-09-28" @default.
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- W4387113604 date "2023-09-26" @default.
- W4387113604 modified "2023-09-29" @default.
- W4387113604 title "A computational study for understanding the impact of p120-catenin on the <i>cis</i>-dimerization of cadherin" @default.
- W4387113604 doi "https://doi.org/10.1093/jmcb/mjad055" @default.
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- W4387113604 hasPublicationYear "2023" @default.
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