Origin of the lognormal shape in the boson-peak of globular proteins

M. Nöllmann and P. Etchegoin

Physica A: Statistical Mechanics and its Applications, 2001, vol. 294, issue 1, 44-50

Abstract: We propose an explanation for the origin of the lognormal shape in the boson-peak anomaly of globular proteins. The origin is ascribed to a distribution of quasi-localization lengths for acoustic waves within the protein. The local densities of states for different sites display logarithmic singularities in this range. The distribution of these singularities, however, follows a lognormal distribution. This seems to be a universal characteristic for quasi-two dimensional random networks, which are used to model the protein dynamics. This interpretation makes explicit contact with well established models for the boson-peak anomaly in glasses and/or amorphous solids.

Keywords: Structure and bonding; Dynamics and conformational changes; Molecular interactions (search for similar items in EconPapers)
Date: 2001
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:294:y:2001:i:1:p:44-50

DOI: 10.1016/S0378-4371(01)00124-8

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