The Protein Interaction Database has been developed to assist researchers in understanding the protein-protein interactions which occur in our cells. This database lists thousands of Human protein-protein interactions. The Protein Interaction Database allows one to search for a protein, then view all of the other proteins which it activates, inhibits or binds to. This database also indicates the interactions which proteins have with other molecules such as DNA, as well as downstream affects which occur from the protein interactions. These protein interactions are required for proper signal tranduction and play an essential role in all functions of our cells.

The Protein Interaction Database was created through in-dept research of hundreds of signal transduction pathways. All of the protein-protein interaction data has been manually curated by Protein Lounge's team of researchers. The Protein Interaction Database is also linked to the Protein Lounge Pathway Database, which allows one to view detailed signaling information about each of the proteins in the interaction maps. All of the proteins in the Protein Interaction Database are linked to detailed protein datasheets, reviews, sequences and other necessary protein information. The Protein Interaction Database is a useful resource for those who are studying protein interactions and function.