From July 2024 the PDB file archive will not be offered in the compressed MMTF format anymore. Users are strongly encouraged to switch to the BinaryCIF format <https://github.com/molstar/BinaryCIF>, which has been available since 2020. Details on how to access BinaryCIF (BCIF) data files for the entire PDB archive are available here <https://www.rcsb.org/docs/programmatic-access/file-download-services#pdb-entry-files> . RCSB PDB support is ready to assist with any issues or questions at info@rcsb.org. Best wishes Jose --- Jose Duarte RCSB Protein Data Bank San Diego Supercomputer Center UC San Diego La Jolla CA, USA