IJCsatellite IJCsatellite/qbio



From: Guido Tiana [view email]
Date: Mon, 16 May 2005 15:11:00 GMT   (557kb)

Design of amino acid sequences to fold into C_alpha-model proteins

Authors: A. Amatori, G. Tiana, L. Sutto, J.Ferkinghoff-Borg, A. Trovato, R. A. Broglia

Subj-class: Biomolecules

In order to extend the results obtained with minimal lattice models to more realistic systems, we study a model where proteins are described as a chain of 20 kinds of structureless amino acids moving in a continuum space and interacting through a contact potential controlled by a 20x20 quenched random matrix. The goal of the present work is to design and characterize amino acid sequences folding to the SH3 conformation, a 60-residues recognition domain common to many regulatory proteins. We show that a number of sequences can fold, starting from a random conformation, to within a distance root mean square deviation (dRMSD) of 2.6A from the native state. Good folders are those sequences displaying in the native conformation an energy lower than a sequence--independent threshold energy.


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