Cited by 359Protein Kinase Regulation and GTPase SignalingVascular Malformations Diagnosis and TreatmentHippo pathway signaling and YAP/TAZ

A PP2A phosphatase high density interaction network identifies a novel striatin-interacting phosphatase and kinase complex linked to the cerebral cavernous malformation 3 (CCM3) protein

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Goudreault, Marilyn, D'Ambrosio, Lisa M., Kean, Michelle J., Mullin, Michael J., Larsen, Brett G., Sanchez, Amy, Chaudhry, Sidharth, Chen, Ginny I. +5 more·2009·Molecular & Cellular Proteomics

Abstract

The serine/threonine protein phosphatases are targeted to specific subcellular locations and substrates in part via interactions with a wide variety of regulatory proteins. Understanding these interactions is thus critical to understanding phosphatase function. Using an iterative affinity purification/mass spectrometry approach, we generated a high density interaction map surrounding the protein phosphatase 2A catalytic subunit. This approach recapitulated the assembly of the PP2A catalytic subunit into many different trimeric complexes but also revealed several new protein-protein interactions. Here we define a novel large multiprotein assembly, referred to as the striatin-interacting phosphatase and kinase (STRIPAK) complex. STRIPAK contains the PP2A catalytic (PP2Ac) and scaffolding (PP2A A) subunits, the striatins (PP2A regulatory B''' subunits), the striatin-associated protein Mob3, the novel proteins STRIP1 and STRIP2 (formerly FAM40A and FAM40B), the cerebral cavernous malformation 3 (CCM3) protein, and members of the germinal center kinase III family of Ste20 kinases. Although the function of the CCM3 protein is unknown, the CCM3 gene is mutated in familial cerebral cavernous malformations, a condition associated with seizures and strokes. Our proteomics survey indicates that a large portion of the CCM3 protein resides within the STRIPAK complex, opening the way for further studies of CCM3 biology. The STRIPAK assembly establishes mutually exclusive interactions with either the CTTNBP2 proteins (which interact with the cytoskeletal protein cortactin) or a second subcomplex consisting of the sarcolemmal membrane-associated protein (SLMAP) and the related coiled-coil proteins suppressor of IKKepsilon (SIKE) and FGFR1OP2. We have thus identified several novel PP2A-containing protein complexes, including a large assembly linking kinases and phosphatases to a gene mutated in human disease.

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Crossref · 10.1074/mcp.m800266-mcp200

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  • B′′′ subunits interact with PP2A/A and PP2A/C and with other proteins, including kinases, to form STRIPAK complexes.

    “In addition to interacting with PP2A/A and PP2A/C subunits and carrying out dephosphorylation-related cellular functions, multiple other proteins have been shown to interact with B”’ subunits, including kinases, to form large signaling complexes referred to as Striatin-interacting phosphatase and kinase complexes (or STRIPAKs) (Goudreault et al., 2009).”

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Authors
Goudreault, M., D'Ambrosio, L. M., Kean, M. J., Mullin, M. J., Larsen, B. G., Sanchez, A., Chaudhry, S., Chen, G. I., Sicheri, F., Nesvizhskii, A. I., Aebersold, R., Raught, B., & Gingras, A.-C.
Affiliations
  • Mount Sinai Hospital (CA)
  • Institute for Systems Biology (US)
  • University of Toronto (CA)
  • University of Michigan (US)
  • University of Zurich (CH)
Corresponding author
Gingras, Anne-Claude
Venue
Molecular & Cellular Proteomics
Publisher
Elsevier BV
Published
2009-01
Volume
8
Issue
1
Pages
157-171
ISSN
1535-9476 (ISSN-L)
OpenAlex
W2116227658
Cited by
359
References
98
Citations by year
2026: 8 · 2025: 13 · 2024: 22 · 2023: 18 · 2022: 16 · 2021: 17 · 2020: 27 · 2019: 22 · 2018: 20 · 2017: 15 · 2016: 13 · 2015: 20 · 2014: 29 · 2013: 24 · 2012: 40
FWCI
7.54
Type
journal article
Language
en
Open access
Locations
  • Molecular & Cellular Proteomics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Repository for Publications and Research Data (ETH Zurich) (submittedVersion, cc-by)
  • ETH Zürich Research Collection (cc-by)
Funders
  • National Institutes of Health (n01hv28179-12-0-0)
  • National Heart, Lung, and Blood Institute (N01 HV028179, N01-HV-28179)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Health Sciences › Medicine › Neurology › Vascular Malformations Diagnosis and Treatment
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › Hippo pathway signaling and YAP/TAZ
Keywords
protein phosphatase 2A, STRIPAK complex, CCM3, striatin, protein-protein interaction, PP2A catalytic subunit, PP2A regulatory subunit, Ste20 kinase, cortactin, cerebral cavernous malformations
MeSH terms
Calmodulin-Binding Proteins, Carrier Proteins, Cytoskeletal Proteins, HeLa Cells, Humans, Membrane Proteins, Nerve Tissue Proteins, Phosphotransferases, Protein Binding, Phosphate-Binding Proteins, Multiprotein Complexes, Protein Phosphatase 2

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