The PRODRG software is a good starting point for getting topologies for molecular dynamics simulations. However, there are major and minor issues with force-field compatibilities, besides the fact that most of the time these topologies require extra parameterization. A trustable model demands the topology that can reproduce some experimental data, or the topology, which was previously published. A good start, for instance, is to calculate the heat of vaporization or solvation-free energy for a simulated molecule.
Sometimes having anything is better than nothing - but this approach is not ideal. I'd rather use them as a starting point to next steps, where I usually tune them using at least QM methods.
Good luck!
Here's a description of an alternative to the PRODRG server. As any automated approach, it will not lead to perfect topologies, but they seem to behave reasonably well in validations against experimental data:
https://www.researchgate.net/publication/231247792_An_Automated_Force_Field_Topology_Builder_%28ATB%29_and_Repository_Version_1.0?ev=srch_pub
Article An Automated Force Field Topology Builder (ATB) and Reposito...
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