Collapse transition of a hydrophobic self-avoiding random walk in a coarse-grained model solvent.
In order to study solvation effects on protein folding, we analyze the collapse transition of a self-avoiding random walk composed of hydrophobic segments that is embedded in a lattice model of a solvent. As expected, hydrophobic interactions lead to an attractive potential of mean force among chain segments. As a consequence, the random walk in solvent undergoes a collapse transition at a higher temperature than in its absence. Chain collapse is accompanied by the formation of a region depleted of solvent around the chain. In our simulation, the depleted region at collapse is as large as our computational domain.
Gaudreault
Mathieu
M
Department of Physics, McGill University, Montreal, Quebec, Canada H3A 2T8.
Viñals
Jorge
J
D057927:Hydrophobic and Hydrophilic Interactions; D008956:Models, Chemical; D012997:Solvents / Q000737:chemistry*
D012997:Solvents