PhosphoPOINT: A comprehensive human kinase interactome and phospho-protein database

Chia Ying Yang, Chao Hui Chang, Ya Ling Yu, Tsu Chun Emma Lin, Sheng An Lee, Chueh Chuan Yen, Jinn Moon Yang, Jin Mei Lai, Yi Ren Hong, Tzu Ling Tseng, Kun Mao Chao*, Chi Ying F. Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

81 Scopus citations


Motivation: To fully understand how a protein kinase regulates biological processes, it is imperative to first identify its substrate(s) and interacting protein(s). However, of the 518 known human serine/threonine/tyrosine kinases, 35% of these have known substrates, while 14% of the kinases have identified substrate recognition motifs. In contrast, 85% of the kinases have protein-protein interaction (PPI) datasets, raising the possibility that we might reveal potential kinase-substrate pairs from these PPIs. Results: PhosphoPOINT, a comprehensive human kinase interactome and phospho-protein database, is a collection of 4195 phospho-proteins with a total of 15 738 phosphorylation sites. PhosphoPOINT annotates the interactions among kinases, with their down-stream substrates and with interacting (phospho)-proteins to modulate the kinase-substrate pairs. PhosphoPOINT implements various gene expression profiles and Gene Ontology cellular component information to evaluate each kinase and their interacting (phospho)-proteins/substrates. Integration of cSNPs that cause amino acids change with the proteins with the phosphoprotein dataset reveals that 64 phosphorylation sites result in a disease phenotypes when changed; the linked phenotypes include schizophrenia and hypertension. PhosphoPOINT also provides a search function for all phospho-peptides using about 300 known kinase/phosphatase substrate/ binding motifs. Altogether, PhosphoPOINT provides robust annotation for kinases, their downstream substrates and their interaction (phospho)-proteins and this should accelerate the functional characterization of kinomemediated signaling.

Original languageEnglish
Pages (from-to)i14–i20
Number of pages7
Issue number16
StatePublished - 15 Aug 2008


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