Phosphodiesterase-8A binds to and regulates Raf-1 kinase

Kim M. Brown, Jon P. Day, Elaine Huston, Bastian Zimmermann, Kornelia Hampel, Frank Christian, David Romano, Selim Terhzaz, Louisa C Y Lee, Miranda J. Willis, David Morton, Joseph A. Beavo, Masami Shimizu-Albergine, Shireen A. Davies, Walter Kolch, Miles D. Houslay, George S. Baillie

Research output: Contribution to journalArticle

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Abstract

V-raf-1 murine leukemia viral oncogene homolog 1 (Raf-1) is a key activator of the ERK pathway and is a target for cross-regulation of this pathway by the cAMP signaling system. The cAMP-activated protein kinase, PKA, inhibits Raf-1 by phosphorylation on S259. Here, we show that the cAMP-degrading phosphodiesterase-8A (PDE8A) associates with Raf-1 to protect it from inhibitory phosphorylation by PKA, thereby enhancing Raf-1's ability to stimulate ERK signaling. PDE8A binds to Raf-1 with high (picomolar) affinity. Mapping of the interaction domain on PDE8A using peptide array technology identified amino acids 454-465 as the main binding site, which could be disrupted by mutation. A cell-permeable peptide corresponding to this region disrupted the PDE8A/Raf-1 interaction in cells, thereby reducing ERK activation and the cellular response to EGF. Overexpres-sion of a catalytically inactive PDE8A in cells displayed a dominant negative phenotype on ERK activation. These effects were recapitulated at the organism level in genetically modified (PDE8A-/-) mice. Similarly, PDE8 deletion in Drosophila melanogaster reduced basal ERK activation and sensitized flies to stress-induced death. We propose that PDE8A is a physiological regulator of Raf-1 signaling in some cells.

Original languageEnglish (US)
JournalProceedings of the National Academy of Sciences of the United States of America
Volume110
Issue number16
DOIs
StatePublished - Apr 16 2013

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Proto-Oncogene Proteins c-raf
Phosphoric Diester Hydrolases
Phosphorylation
MAP Kinase Signaling System
Drosophila melanogaster
Oncogenes
Epidermal Growth Factor
Cell Communication
Diptera
Protein Kinases
Leukemia
Binding Sites
Technology
Phenotype
Amino Acids
Peptides
Mutation

ASJC Scopus subject areas

  • General

Cite this

Brown, K. M., Day, J. P., Huston, E., Zimmermann, B., Hampel, K., Christian, F., ... Baillie, G. S. (2013). Phosphodiesterase-8A binds to and regulates Raf-1 kinase. Proceedings of the National Academy of Sciences of the United States of America, 110(16). https://doi.org/10.1073/pnas.1303004110

Phosphodiesterase-8A binds to and regulates Raf-1 kinase. / Brown, Kim M.; Day, Jon P.; Huston, Elaine; Zimmermann, Bastian; Hampel, Kornelia; Christian, Frank; Romano, David; Terhzaz, Selim; Lee, Louisa C Y; Willis, Miranda J.; Morton, David; Beavo, Joseph A.; Shimizu-Albergine, Masami; Davies, Shireen A.; Kolch, Walter; Houslay, Miles D.; Baillie, George S.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 110, No. 16, 16.04.2013.

Research output: Contribution to journalArticle

Brown, KM, Day, JP, Huston, E, Zimmermann, B, Hampel, K, Christian, F, Romano, D, Terhzaz, S, Lee, LCY, Willis, MJ, Morton, D, Beavo, JA, Shimizu-Albergine, M, Davies, SA, Kolch, W, Houslay, MD & Baillie, GS 2013, 'Phosphodiesterase-8A binds to and regulates Raf-1 kinase', Proceedings of the National Academy of Sciences of the United States of America, vol. 110, no. 16. https://doi.org/10.1073/pnas.1303004110
Brown, Kim M. ; Day, Jon P. ; Huston, Elaine ; Zimmermann, Bastian ; Hampel, Kornelia ; Christian, Frank ; Romano, David ; Terhzaz, Selim ; Lee, Louisa C Y ; Willis, Miranda J. ; Morton, David ; Beavo, Joseph A. ; Shimizu-Albergine, Masami ; Davies, Shireen A. ; Kolch, Walter ; Houslay, Miles D. ; Baillie, George S. / Phosphodiesterase-8A binds to and regulates Raf-1 kinase. In: Proceedings of the National Academy of Sciences of the United States of America. 2013 ; Vol. 110, No. 16.
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