Protein phosphorylation is the most common reversible post-translational modification in eukaryotes, yet signaling networks comprising protein kinases, their regulators, and their substrates are only partially elucidated. The overall goals of the proposed project are to build a comprehensive collection of consensus phosphorylation motifs for the entire collection of protein kinases encoded in the human genome using arrayed positional scanning peptide libraries, and integrate this data into web-accessible tools that are currently available to the entire biomedical community. The resulting dataset of protein kinase specificity motifs and informatics tools will: (1) allow functional annotation of a large number of proteins whose phosphorylation sites already have been, or currently are, being mapped in high-throughput phosphoproteomic mass- spectrometry experiments and datasets that have been previously funded by the NIH by now identifying the relevant kinase and signaling pathways responsible for these modifications;(2) allow the identification of new protein kinase substrates relevant to human health and disease and place them within the context of specific signal transduction pathways;and (3) provide a general set of kinase tools useful for structural and drug inhibitor studies and for the therapeutic targeting of specific signaling pathways implicated in human disease. To illustrate the utility of our approach, we will investigate predicted substrates of protein kinases in the Hippo signaling pathway, a conserved tumor suppressor pathway important in regulating cell proliferation, differentiation and survival. This project will serve to increase our fundamental understanding of how specificity is achieved by protein kinases, will identify critical connections in signaling networks, and will provide a general resource for researchers studying signal transduction and protein phosphorylation.

Public Health Relevance

Protein kinases play key roles in human disease and are important targets for some anti-cancer drugs. In this research, we are using high-throughput methods to analyze the function of every human kinase. This work will help in determining which kinases will be effective drug targets, and will provide resources to assist in kinase-targeted drug discovery.

National Institute of Health (NIH)
National Institute of General Medical Sciences (NIGMS)
Research Project (R01)
Project #
Application #
Study Section
Molecular and Integrative Signal Transduction Study Section (MIST)
Program Officer
Dunsmore, Sarah
Project Start
Project End
Budget Start
Budget End
Support Year
Fiscal Year
Total Cost
Indirect Cost
Yale University
Schools of Medicine
New Haven
United States
Zip Code
Peterson, Laura B; Yaffe, Michael B; Imperiali, Barbara (2014) Selective mitogen activated protein kinase activity sensors through the application of directionally programmable D domain motifs. Biochemistry 53:5771-8
Deng, Yang; Alicea-Velázquez, Nilda L; Bannwarth, Ludovic et al. (2014) Global analysis of human nonreceptor tyrosine kinase specificity using high-density peptide microarrays. J Proteome Res 13:4339-46
Galan, Jacob A; Geraghty, Kathryn M; Lavoie, Geneviève et al. (2014) Phosphoproteomic analysis identifies the tumor suppressor PDCD4 as a RSK substrate negatively regulated by 14-3-3. Proc Natl Acad Sci U S A 111:E2918-27
Goodwin, Jonathan M; Svensson, Robert U; Lou, Hua Jane et al. (2014) An AMPK-independent signaling pathway downstream of the LKB1 tumor suppressor controls Snail1 and metastatic potential. Mol Cell 55:436-50
Etheridge, Ronald D; Alaganan, Aditi; Tang, Keliang et al. (2014) The Toxoplasma pseudokinase ROP5 forms complexes with ROP18 and ROP17 kinases that synergize to control acute virulence in mice. Cell Host Microbe 15:537-50
Qian, Wen-Jian; Park, Jung-Eun; Lim, Dan et al. (2013) Peptide-based inhibitors of Plk1 polo-box domain containing mono-anionic phosphothreonine esters and their pivaloyloxymethyl prodrugs. Chem Biol 20:1255-64