I have not tried this in ISOLDE, but in Coot I would replace the residue with P1L (Palmitoylated cysteine) - might run into the same error though, not sure...

Oli

On Jun 11, 2025, at 11:20 AM, Alexis Rohou via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hi ISOLDE users & Tristan,

Has anyone got experience building a palmitoylated cysteine residue? I'd appreciate any pointers you may have. Based on how glycosylations can be built (see thread) I was thinking to start with

isolde add ligand PLM

but that fails with "ValueError: No template for residue type PLM"

Are we in covalent ligand (unsupported) territory here?

Cheers,
Alexis
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