Self-assembly of protein amyloid: a competition between amorphous and ordered aggregation

Details Self-assembly of protein amyloid: a competition between amorphous and ordered aggregation Self-assembly of protein amyloid: a competition between amorphous and ordered aggregation

2008-02-14

arxiv.org/abs/0802.1985v5

Physical Review E 80, 031922 (2009)

Physics

Condensed Matter

Soft Condensed Matter

Minor changes in the presentation

Scientific paper

10.1103/PhysRevE.80.031922

Protein aggregation in the form of amyloid fibrils has important biological and technological implications. Although the self-assembly process is highly efficient, aggregates not in the fibrillar form would also occur and it is important to include these disordered species when discussing the thermodynamic equilibrium behavior of the system. Here, we initiate such a task by considering a mixture of monomeric proteins and the corresponding aggregates in the disordered form (micelles) and in the fibrillar form (amyloid fibrils). Starting with a model on the respective binding free energies for these species, we calculate their concentrations at thermal equilibrium. We then discuss how the incorporation of the disordered structure furthers our understanding on the various amyloid promoting factors observed empirically, and on the kinetics of fibrilization.

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