Best Practices for Simulating Small Ligand-Protein Complexes in GROMACS?

Hi everyone,

I’m relatively new to GROMACS and I’ve been exploring its capabilities for simulating ligand-protein systems. I’ve mostly worked on protein-only simulations so far, but now I want to move into protein-ligand complexes (small molecules docked into active sites). I’m wondering:

  • What are the best practices for setting up such systems in GROMACS?
  • Are there any specific force fields or tools recommended for generating ligand topologies (besides PRODRG, which seems a bit outdated)?
  • How do people usually validate or check the stability of such complexes over long simulations?

Would really appreciate any insights or shared experiences—especially any gotchas I should be aware of during preprocessing or production runs. Thanks in advance!