Molecules 2010, 15(4), 2730-2748; doi:10.3390/molecules15042730
Article

MMPBSA Decomposition of the Binding Energy throughout a Molecular Dynamics Simulation of Amyloid-Beta (Aß10−35) Aggregation

Josep M. Campanera and Ramon Pouplana* email
Departament de Fisicoquímica, Facultat de Farmàcia, Universitat de Barcelona, Av. Joan XXIII, s/n, Diagonal Sud, 08028 Barcelona, Catalonia, Spain
* Author to whom correspondence should be addressed.
Received: 13 February 2010; in revised form: 11 March 2010 / Accepted: 19 March 2010 / Published: 15 April 2010
(This article belongs to the Special Issue Combinatorial Chemistry)
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Abstract: Recent experiments with amyloid-beta (Aβ) peptides indicate that the formation of toxic oligomers may be an important contribution to the onset of Alzheimer’s disease. The toxicity of Aβ oligomers depend on their structure, which is governed by assembly dynamics. However, a detailed knowledge of the structure of at the atomic level has not been achieved yet due to limitations of current experimental techniques. In this study, replica exchange molecular dynamics simulations are used to identify the expected diversity of dimer conformations of Aβ10−35 monomers. The most representative dimer conformation has been used to track the dimer formation process between both monomers. The process has been characterized by means of the evolution of the decomposition of the binding free energy, which provides an energetic profile of the interaction. Dimers undergo a process of reorganization driven basically by inter-chain hydrophobic and hydrophilic interactions and also solvation/desolvation processes.
Keywords: Alzheimer’s disease;amyloid-beta (Aβ) peptides; dimerization; replica exchange molecular dynamics (REMD); binding free energy calculations; Kepler scientific workflow

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MDPI and ACS Style

Campanera, J.M.; Pouplana, R. MMPBSA Decomposition of the Binding Energy throughout a Molecular Dynamics Simulation of Amyloid-Beta (Aß10−35) Aggregation. Molecules 2010, 15, 2730-2748.

AMA Style

Campanera JM, Pouplana R. MMPBSA Decomposition of the Binding Energy throughout a Molecular Dynamics Simulation of Amyloid-Beta (Aß10−35) Aggregation. Molecules. 2010; 15(4):2730-2748.

Chicago/Turabian Style

Campanera, Josep M.; Pouplana, Ramon. 2010. "MMPBSA Decomposition of the Binding Energy throughout a Molecular Dynamics Simulation of Amyloid-Beta (Aß10−35) Aggregation." Molecules 15, no. 4: 2730-2748.

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