From modeling to medicinal chemistry: automatic generation of two-dimensional complex diagrams.

As a result of the increasing application of structure-based drug design, the visualization of protein-ligand complexes has become an important feature in medicinal chemistry. The large number of experimentally resolved complex structures and the further development of computer-aided methods like docking or de novo design establishes new possibilities in this field. During lead finding and optimization, a manual investigation of many complexes and their interaction patterns is typically performed. We present an algorithm that automatically generates 2D-protein-ligand diagrams as a possible solution for a transparent visualization of the contact partners in a complex and as a support for scientists in the evaluation of structure-based design results. Running the software on representative test data sets, it generates collision free layouts for approximately 76% of the cases in the range of tenths of a second per complex. The success rate for complexes with ligands which have a molecular weight <500 Da is 87%.