Freezing Transition of Compact Polyampholytes

Preprint

5 September 1996

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.cond-mat/9609062

Abstract

Polyampholytes (PAs) are heteropolymers with long range Coulomb interactions. Unlike polymers with short range forces, PA energy levels have non-vanishing correlations and are thus very different from the Random Energy Model (REM). Nevertheless, if charges in the PA globule are screened as in a regular plasma, PAs freeze in REM fashion. Our results shed light on the potential role of Coulomb interactions in folding and evolution of {\it proteins}, which are weakly charged PAs, in particular making connection with the finding that sequences of charged amino acids in proteins are not random.

Keywords

POLYAMPHOLYTES POLYAMPHOLYTES
COMPACT POLYAMPHOLYTES
FREEZING TRANSITION
HETEROPOLYMERS
ENERGY LEVELS
AMINO ACIDS
LONG RANGE
EVOLUTION
COULOMB

All Related Versions

Version 1, 1996-09-05, ArXiv
Published version: Physical Review Letters, 77 (17), 3565.

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