THE RANGE OF THE CONTACT INTERACTIONS AND THE KINETICS OF THE GO MODELS OF PROTEINS

Marek Cieplak and Trinh Xuan Hoang
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Marek Cieplak: Institute of Physics, Polish Academy of Sciences, 02-668 Warsaw, Poland
Trinh Xuan Hoang: The Abdus Salam International Center for Theoretical Physics, Strada Costriera 11, 34100 Trieste, Italy;

International Journal of Modern Physics C (IJMPC), 2002, vol. 13, issue 09, 1231-1242

Abstract: We consider two types of Go models of a protein (crambin) and study their kinetics through molecular dynamics simulations. In the first model, the residue–residue contact interactions are selected based on a cutoff distance,Rc. The folding times strongly depend on the value ofRcand nonmonotonically. This indicates a need for a physically determined set of native contacts. One may accomplish it by considering the van der Waals radii of the residual atoms and checking if the atoms overlap. In the second model, non-native attractive contacts are added to the system. This leads to bad foldability. However, for a small number of such extra contacts there is a slight acceleration in the kinetics of folding.

Keywords: Protein folding; folding rate; molecular dynamics (search for similar items in EconPapers)
Date: 2002
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DOI: 10.1142/S012918310200408X

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