Extra pdb file:

The required pdb files will be identified from the list
of motif-protein pairs and pdb structures and will be
automatically downloaded.

However, if a structure that is not in the RCSB PDB database
is needed or if only one structure is being matched, it can
be uploaded directly by using this input box.

Format
The input pdb file must have name such as
pdb1abc.ent

i.e. "pdb" + PDBID + ".ent" where PDBID is the
4 alphanumeric character PDB identifier which will also
appear in the input list of motif-protein pairs.