Solvent-induced organization: a physical model of folding myoglobin.
The essential features of the in vitro refolding of myoglobin are expressed in a solvable physical model. Alpha helices are taken as the fundamental collective coordinates of the system, while the refolding is assumed to be mainly driven by solvent-induced hydrophobic forces. A quantitative model of these forces is developed and compared with experimental and theoretical results. The model is then tested by being employed in a simulation scheme designed to mimic solvent effects. Realistic dynamic trajectories of myoglobin are shown as it folds from an extended conformation to a close approximation of the native state. Various suggestive features of the process are discussed. The tenets of the model are further tested by folding the single-chain plant protein leghemoglobin.
Callaway
D J
DJ
Department of Physics, Rockefeller University, New York, NY 10021-6399.
D008956:Models, Chemical; D008958:Models, Molecular; D009211:Myoglobin / Q000737:chemistry*; D017510:Protein Folding; D012997:Solvents; D014867:Water / Q000737:chemistry
D009211:Myoglobin; D012997:Solvents; D014867:Water