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UCSF Chimera was used to first fit the subunits into the single native pilus rod map (PDB Accession ID: 9I37) and average their relative angles, and i ...
UCSF Chimera was used to first fit the subunits into the single native pilus rod map (PDB Accession ID: 9I37) and average their relative angles, and it was also used to adjust pixel spacing of all maps to match model dimensions. Coot was used to adjust side chain and loop positions. A pair of antiparallel pili with subunit angles adjusted to 3-turns-per-7-subunits symmetry was overlapped with a 2D class to adjust the binding junction angle. Finally, Phenix was used to fit the pair model into the map.