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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 J+Phys+Chem+Lett
2014 ; 5
(19
): 3441-3444
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Hamiltonian Mapping Revisited: Calibrating Minimalist Models to Capture Molecular
Recognition by Intrinsically Disordered Proteins
#MMPMID25289116
Law SM
; Ahlstrom LS
; Panahi A
; Brooks CL 3rd
J Phys Chem Lett
2014[Oct]; 5
(19
): 3441-3444
PMID25289116
show ga
Molecular recognition by intrinsically disordered proteins (IDPs) plays a central
role in many critical cellular processes. Toward achieving detailed mechanistic
understanding of IDP-target interactions, here we employ the "Hamiltonian
mapping" methodology, which is rooted in the weighted histogram analysis method
(WHAM), for the fast and efficient calibration of structure-based models in
studies of IDPs. By performing reference simulations on a given Hamiltonian, we
illustrate for two model IDPs how this method can extrapolate thermodynamic
behavior under a range of modified Hamiltonians, in this case representing
changes in the binding affinity (K(d)) of the system. Given sufficient
conformational sampling in a single trajectory, Hamiltonian mapping accurately
reproduces K(d) values from direct simulation. This method may be generally
applied to systems beyond IDPs in force field optimization and in describing
changes in thermodynamic behavior as a function of external conditions for
connection with experiment.