This command re-labels residue numbers in each chain (i.e., segment) so that they start with renumber_residues[iseg]. In addition, the single character PDB chain id's are also assigned: They are obtained from the corresponding elements of segment_ids. Thus, there should be as many elements in segment_ids and renumber_residues as there are chains in the current MODEL.
# Example for: model.rename_segments() # This will assign new PDB single-character chain id's to all the chains # in the input PDB file (in this example there are two chains). from modeller import * env = environ() env.io.atom_files_directory = ['../atom_files'] mdl = model(env, file='2abx') # Assign new segment names and write out the new model: mdl.rename_segments(segment_ids=('X', 'Y')) mdl.write(file='2abx-renamed.pdb')