Hi Dean, As I understand it, glb (gltf) files do not contain the atomic/molecular information needed to use Matchmaker or other atomic analysis tools. They may look like they contain atoms, but they are just graphical objects, without the associated chemical knowledge of atoms and their elements, amino acid residue names, etc. So it is not a case of simple format conversion. The information is simply missing. You would need to start with an atomic structure (PDB, mmCIF, mol2, etc.) in order to use Matchmaker and other atomic analysis like H-bonds, contacts, etc. Best, Elaine ----- Elaine C. Meng, Ph.D. UCSF Chimera(X) team Resource for Biocomputing, Visualization, and Informatics Department of Pharmaceutical Chemistry University of California, San Francisco

On Apr 27, 2024, at 6:57 PM, Rowe-Magnus, Dean via ChimeraX-users <chimerax-users@cgl.ucsf.edu> wrote:

Hello,

Can you please tell me how to save a .glb file as a .pdb so that I can use Matchmaker to align the structures?

Thank you,

Dean