Mapping of mutation-sensitive sites in protein-like chains

Details Mapping of mutation-sensitive sites in protein-like chains Mapping of mutation-sensitive sites in protein-like chains

1998-03-28

arxiv.org/abs/cond-mat/9803343v1

Physics

Condensed Matter

Statistical Mechanics

15 pages, 6 figures

Scientific paper

10.1103/PhysRevE.58.3572

In this work we have studied, with the help of a simple on-lattice model, the distribution pattern of sites sensitive to point mutations ('hot' sites) in protein-like chains. It has been found that this pattern depends on the regularity of the matrix that rules the interaction between different kinds of residues. If the interaction matrix is dominated by the hydrophobic effect (Miyazawa Jernigan like matrix), this distribution is very simple - all the 'hot' sites can be found at the positions with maximum number of closest nearest neighbors (bulk). If random or nonlinear corrections are added to such an interaction matrix the distribution pattern changes. The rising of collective effects allows the 'hot' sites to be found in places with smaller number of nearest neighbors (surface) while the general trend of the 'hot' sites to fall into a bulk part of a conformation still holds.

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