HPRD: Human Protein Reference Database

Human Protein Reference Database (http://www.hprd.org) is a web resource based on open source technologies for protein information about several aspects of human proteins including protein-protein interactions, post-translational modifications, enzyme-substrate relationships and disease associations. Information that are cataloged were derived manually by critical reading of the published literature by expert biologists and through bioinformatics analyses of the protein sequence. This database will assist in biomedical discoveries by serving as a resource of genomic and proteomic information and providing an integrated view of sequence, structure, function and protein networks in health and disease.

Cited from http://en.wikipedia.org/wiki/HPRD