We describe features of our methodology for predicting tertiary structures
(i.e., conformations) of proteins in solvent just from the amino-acid seque
nces and molecular models for the solvent. The methodology, which is a comb
ination of the Monte Carlo simulated annealing technique and the reference
interaction site model theory, is illustrated for the small peptides, Met-e
nkephalin and C-peptide. Important roles played by water are discussed, and
the alcohol effects on peptide conformations are newly analyzed. (C) 2001
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