phosphositeplus

is an Aggregator.

PhosphoSitePlus is a comprehensive resource for experimentally validated post-translational modifications (PTMs) with emphasis on phosphorylation, ubiquitination, acetylation, methylation and more. It aggregates curated site-specific modification data, kinase–substrate relationships, protein domains, mutation impact annotations, sequence motifs, and pathway/interaction context to support signaling, proteomics, and systems biology research.