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• W2134820278 startingPage "12482" @default.
• W2134820278 abstract "The present study explores a “hydrophobic” energy function for folding simulations of the protein lattice model. The contribution of each monomer to conformational energy is the product of its “hydrophobicity” and the number of contacts it makes, i.e., E(h⃗, c⃗) = −Σ i=1 N c i h i = −(h⃗.c⃗) is the negative scalar product between two vectors in N -dimensional cartesian space: h⃗ = (h 1 , … , h N ) , which represents monomer hydrophobicities and is sequence-dependent; and c⃗ = (c 1 , … , c N ) , which represents the number of contacts made by each monomer and is conformation-dependent. A simple theoretical analysis shows that restrictions are imposed concomitantly on both sequences and native structures if the stability criterion for protein-like behavior is to be satisfied. Given a conformation with vector c⃗, the best sequence is a vector h⃗ on the direction upon which the projection of c⃗ − c̄⃗ is maximal, where c̄⃗ is the diagonal vector with components equal to c̄, the average number of contacts per monomer in the unfolded state. Best native conformations are suggested to be not maximally compact, as assumed in many studies, but the ones with largest variance of contacts among its monomers, i.e., with monomers tending to occupy completely buried or completely exposed positions. This inside/outside segregation is reflected on an apolar/polar distribution on the corresponding sequence. Monte Carlo simulations in two dimensions corroborate this general scheme. Sequences targeted to conformations with large contact variances folded cooperatively with thermodynamics of a two-state transition. Sequences targeted to maximally compact conformations, which have lower contact variance, were either found to have degenerate ground state or to fold with much lower cooperativity." @default.
• W2134820278 created "2016-06-24" @default.
• W2134820278 creator A5080781601 @default.
• W2134820278 date "1999-10-26" @default.
• W2134820278 modified "2023-09-23" @default.
• W2134820278 title "Folding protein models with a simple hydrophobic energy function: The fundamental importance of monomer inside/outside segregation" @default.
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• W2134820278 doi "https://doi.org/10.1073/pnas.96.22.12482" @default.
• W2134820278 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/22956" @default.
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