I'm trying to edit a peptide in the 3D Ligand Editor, but it's too large and won't load. What can I do?

[Andrew Orry]

Q. I'm trying to edit a peptide in the 3D Ligand Editor, but it's too large and won't load. What can I do?

A.

By default, the 3D Ligand Editor only supports peptides up to 20 residues. To work with larger peptides, you need to increase the maximum allowed size. You can do this by setting the following ICM variable before opening the editor:

LIGAND.peptideMaxRes = 25 # allows peptides up to 25 residues

Adjust the number as needed for your peptide size.