GROMACS version: 2022
GROMACS modification: Yes
Hello, I currently want to simulate interactions between hexagonal boron nitride and different amino-acids, and I tried to modify the CHARMM27 forcefield as described in the following article’s supplementary materials (https://pubs.acs.org/doi/suppl/10.1021/acs.langmuir.9b03121/suppl_file/la9b03121_si_001.pdf) by adding residues and values to “atomtypes.atp”, “ffnonbonded.itp”, and added a “bn.itp” file that I included in the “forcefield.itp” file (everything in the charmm27.ff folder). However, when I run the gromacs command “gmx pdb2gmx -f myfile.pdb”, I get the following error: “Residue ‘BN’ not found in residue topology database”.
Did I do anything wrong to build this topology or miss any step?
Best,
Louis