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- Title
Network model of a protein globule.
- Authors
Meilikhov, E.; Farzetdinova, R.
- Abstract
Phase transition of a protein globule is considered in the frameworks of (i) the generalized mean-field theory for the order parameter, characterizing the extent of the deviation of a protein three-dimensional structure from its native state and (ii) the network model that treats a protein globule as a small-world network with a significant percent of long-range links between amino acid residues. Temperature dependencies of the introduced order parameter are defined and phase-transition temperatures are found on the basis of the function defining the distribution of links' numbers for protein residues. An important role of long-range links, promoting considerable rise of thermal protein stability, is demonstrated by the example of a correlation between protein melting temperature and a fraction of disulfide bonds.
- Subjects
GLOBULAR proteins; PHASE transitions; MEAN field theory; PARAMETER estimation; PROTEIN structure; SULFUR bonding; AMINO acid residues
- Publication
Journal of Biological Physics, 2013, Vol 39, Issue 4, p673
- ISSN
0092-0606
- Publication type
Article
- DOI
10.1007/s10867-013-9326-8