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2025 ; 15
(1
): 37169
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Automated parametrization of small molecules within the Martini 3 coarse-grained
model guided by experimental log P values
#MMPMID41131333
Kelidou M
; Stroh KS
; Risselada HJ
Sci Rep
2025[Oct]; 15
(1
): 37169
PMID41131333
show ga
Molecular dynamics simulations play an important role in investigating biological
systems. However, simulating large-scale systems can be computationally
expensive, which can be improved by the employment of a coarse-graining force
field. This study focuses on the automated parametrization of small molecules
within the CGCompiler framework. This optimization approach utilizes a
mixed-variable particle swarm algorithm to avoid the manual tweaking of
parameters. Particularly, the optimization focuses on matching experimentally
known log P values of partitioning in water-octanol phases, reproducing atomistic
density profiles in lipid bilayers, and optimizing overall shape and volume
aspects of the modeled atomistic molecules. After the atomistic to coarse-grained
mapping, the model's accuracy is evaluated through a fitness function, which
combines structural and dynamic targets, to accurately capture the shape and
behavior of the small molecule in question. Through the investigation of the
interactions between small molecules and cellular membranes, this optimization
process supports the development of accurate coarse-grained models for small
molecules relevant to drug discovery. Our work demonstrates promising results in
automating the high-fidelity parametrization of small molecules using the Martini
3 force-field guided by experimental log P values.