GROMACS version: 2024.4
GROMACS modification: No
Hi, I am totally new in molecular dynamics and Linux system. I wanted to use GROMACS for MD of protein that contains asymmetrically methylated arginine (ADMA). This residue is not in OPLS forcefield and I know I have to add this manually to files like residuetypes.dat, ffbonded.itp and ffnonbonded.itp. Also I could use other forcefields like charmm36. How to find or generate such parameters? I know they are some web tools like CHARMM-GUI, LibParGen or Vienna-PTM, but they are not used for ligands topologies? I did run my protein without modifications and it was fine, but after I try do do something with files I have all the time errors. I believe it is not an easy issue. Thank you for help in advance.