I need to fit atomic structures of two different proteins of different sizes in a density map. The location of both the proteins in the map is well known. While using the fitting tool, I can get the atomic structure of the bigger protein docked very well, the problem arises while fitting the smaller one. The fit option fails and docks the structure into the region
of the density map where the atomic structure of the larger protein is
docked , an incorrect position.
How can I fit both the atomic structures in the density map correctly? The resolution of the density map is ~10Å at FSC cutoff of 0.5