Exploring the Unfolding Pathway of Maltose Binding Proteins: An Integrated Computational Approach
Online Publication Date2014-08-12
Print Publication Date2014-09-09
Permanent link to this recordhttp://hdl.handle.net/10754/598294
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Abstract© 2014 American Chemical Society. Recent single-molecule force spectroscopy experiments on the Maltose Binding Proteins (MBPs) identified four stable structural units, termed unfoldons, that resist mechanical stress and determine the intermediates of the unfolding pathway. In this work, we analyze the topological origin and the dynamical role of the unfoldons using an integrated approach which combines a graph-theoretical analysis of the interaction network of the MBP native-state with steered molecular dynamics simulations. The topological analysis of the native state, while revealing the structural nature of the unfoldons, provides a framework to interpret the MBP mechanical unfolding pathway. Indeed, the experimental pathway can be effectively predicted by means of molecular dynamics simulations with a simple topology-based and low-resolution model of the MBP. The results obtained from the coarse-grained approach are confirmed and further refined by all-atom molecular dynamics.
CitationGuardiani C, Marino DD, Tramontano A, Chinappi M, Cecconi F (2014) Exploring the Unfolding Pathway of Maltose Binding Proteins: An Integrated Computational Approach. Journal of Chemical Theory and Computation 10: 3589–3597. Available: http://dx.doi.org/10.1021/ct500283s.
SponsorsWe acknowledge the CINECA (ISCRA project NAPS) for the availability of high performance computing resources and support. This research used the resources of the Supercomputing Laboratory at King Abdullah University of Science & Technology (KAUST) in Thuwal, Saudi Arabia.
PublisherAmerican Chemical Society (ACS)
CollectionsPublications Acknowledging KAUST Support
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