[gmx-users] Residue BGC not found in the database

[mary ko]

Dear all,
I face the 'Residue BGC not found in the database' error when I try to build the topology file of my protein-ligand system by pdb2gmx -f pro.pdb. I used Charmm force field but I tried it with all the other force fields as well to see if the problem could be solved which was useless. I searched the list and errors-gromacs in the website and found that the simplest way is to change the name of this residue. As I am not familiar with protein structure, I do not know what changes may be helpful to pass this error. also, it is said that one way is to parameterize the residue which I do not know how to do that. Your help would be highly appreciated.Thanks!