Journal
POLYMERS
Volume 13, Issue 2, Pages -Publisher
MDPI
DOI: 10.3390/polym13020176
Keywords
water model; protein association; protein– protein interaction; ubiquitin; ACTR; molecular dynamics
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Funding
- Spanish government (MCIU/AEI/ERDF) [CTQ2016-78636-P, PGC2018-099277-B-C21]
- Catalan government [2017 SGR 324]
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The study found that TIP4P/2005 is the only water model that accurately simulates the fast association/dissociation dynamics of ubiquitin protein and accurately identifies its binding surface, highlighting the critical role of water models in describing protein self-association processes.
We study self-association of ubiquitin and the disordered protein ACTR using the most commonly used water models. We find that dissociation events are found only with TIP4P-EW and TIP4P/2005, while the widely used TIP3P water model produces straightforward aggregation of the molecules due to the absence of dissociation events. We also find that TIP4P/2005 is the only water model that reproduces the fast association/dissociation dynamics of ubiquitin and best identifies its binding surface. Our results show the critical role of the water model in the description of protein-protein interactions and binding.
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