ProteinShop

ProteinShop is an interactive tool for manipulating protein structures. It was designed to quickly create a set of protein configurations using human knowledge and intuition. These configurations can be subjected to local or global optimization. Although ProteinShop
does not perform the global optimization process itself, it provides a
framework that can be used to interact with a global optimization process
that may be running on a remote machine.

ProteinShop presents three levels of functionality

Level I: Display a 3D protein structure