NDLI: Helix-coil transition in terms of Potts-like spins

Content Provider	Springer Nature Link
Author	Badasyan, Artem Giacometti, Achille Podgornik, Rudolf Mamasakhlisov, Yevgeni Morozov, Vladimir
Copyright Year	2013
Abstract	In the spin model of a helix-coil transition in polypeptides a preferred value of spin has to be assigned to the helical conformation, in order to account for different symmetries of the helical vs. the coil states, leading thus to the Generalized Model of Polypeptide Chain (GMPC) Hamiltonian as opposed to the Potts model Hamiltonian, both with many-body interactions. Comparison of explicit transfer matrix secular equations of the Potts model and the GMPC model reveals that the largest eigenvalue of the Potts model with Δ many-body interactions coincides with the largest eigenvalue of the GMPC model with Δ − 1 many-body interactions, indicating the identity of both free energies. In distinction, the second largest eigenvalues in both models do not coincide, indicating a different behavior for the spatial correlation length that in its turn defines the width of the helix-coil transition interval. We explore in detail the thermodynamic consequences, resulting from spin models with and without the built-in spin anisotropy, that should indicate which model to favour as a more appropriate description of the equilibrium physical properties pertaining to the helix-coil transition.
Starting Page	1
Ending Page	9
Page Count	9
File Format	PDF
ISSN	12928941
Journal	The European Physical Journal E
Volume Number	36
Issue Number	5
e-ISSN	1292895X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2013-05-14
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Living systems: Biological Matter Soft and Granular Matter, Complex Fluids and Microfluidics Biophysics and Biological Physics Surfaces and Interfaces, Thin Films Nanotechnology Polymer Sciences Statistical Physics, Dynamical Systems and Complexity
Content Type	Text
Resource Type	Article
Subject	Chemistry Medicine Biophysics Materials Science Surfaces and Interfaces Biotechnology

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