whenever i download files from Protein Data Bank(PDB),they are downloaded in .ent format. How can i convert them into PDB format??


1 Answer 1


Just rename the file to .pdb - in other words, .ent files are PDB format:

The archival PDB files will be distributed with the reserved conventional names, in the form pdbentry_id.ent, where entry_id is a PDB 4-letter code, e.g. pdb1abc.ent, for PDB format entries; rentry_idsf.ent, e.g. r1abcsf.ent, for X-ray experimental data; entry_id.mr, e.g. 1abc.mr, for NMR experimental/constraints; entry_id.cif, e.g. 1abc.cif, for mmCIF format entries; and entry_id.xml, e.g. 1abc.xml, for canonical XML format entries.

From http://www.wwpdb.org/about/faq

  • $\begingroup$ nothing happened..:/ still it's a ENT file $\endgroup$
    – Haya Dar
    Jan 15, 2016 at 15:49
  • $\begingroup$ Not sure what you mean, sorry. If you open it in a text editor you should see that it looks the same (I think). I can't seem to access the pdb's ftp server at the moment, sadly. $\endgroup$
    – gilleain
    Jan 15, 2016 at 16:28
  • $\begingroup$ @HayaDar Open the file fresh in notepad, file > Save As > file types: all files and change the whole thing to filename.pdb $\endgroup$
    – CKM
    Jan 16, 2016 at 22:09

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