Cited by 108Protein Kinase Regulation and GTPase SignalingProtein Tyrosine PhosphatasesMelanoma and MAPK Pathways

Interaction of the Grb10 Adapter Protein with the Raf1 and MEK1 Kinases

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Nantel, André, Mohammad-Ali, Khosro, Sherk, Jennifer, Posner, Barry I., Thomas, David Y.·1998·Journal of Biological Chemistry

Abstract

Grb10 and its close homologues Grb7 and Grb14, belong to a family of adapter proteins characterized by a proline-rich region, a central PH domain, and a carboxyl-terminal Src homology 2 (SH2) domain. Their interaction with a variety of activated tyrosine kinase receptors is well documented, but their actual function remains a mystery. The Grb10 SH2 domain was isolated from a two-hybrid screen using the MEK1 kinase as a bait. We show that this unusual SH2 domain interacts, in a phosphotyrosine-independent manner, with both the Raf1 and MEK1 kinases. Mutation of the MEK1 Thr-386 residue, which is phosphorylated by mitogen-activated protein kinase in vitro, reduces binding to Grb10 in a two-hybrid assay. Interaction of Grb10 with Raf1 is constitutive, while interaction between Grb10 and MEK1 needs insulin treatment of the cells and follows mitogen-activated protein kinase activation. Random mutagenesis of the SH2 domain demonstrated that the Arg-betaB5 and Asp-EF2 residues are necessary for binding to the epidermal growth factor and insulin receptors as well as to the two kinases. In addition, we show that a mutation in Ser-betaB7 affects binding only to the receptors, while a mutation in Thr-betaC5 abrogates binding only to MEK1. Finally, transfection of Grb10 genes with specific mutations in their SH2 domains induces apoptosis in HTC-IR and COS-7 cells. These effects can be competed by co-expression of the wild type protein, suggesting that these mutants act by sequestering necessary signaling components.

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  1. Margolis, B., Silvennoinen, O., Comoglio, F., Roonprapunt, C., Skolnik, E., Ullrich, A., and Schlessinger, J. (1992) Proc. Natl. Acad. Sci. U. S. A. 89, 8894 -8898
  2. Liu, F., and Roth, R. A. (1995) Proc. Natl. Acad. Sci. U. S. A. 92, 10287-10291
  3. Joung, I., Strominger, J. L., and Shin, J. (1996) Proc. Natl. Acad. Sci. U. S. A. 93, 5991-5995

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Authors
Nantel, A., Mohammad-Ali, K., Sherk, J., Posner, B. I., & Thomas, D. Y.
Affiliations
  • Biotechnology Research Institute (CA)
  • McGill University (CA)
Corresponding author
Nantel, André
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
1998-04
Volume
273
Issue
17
Pages
10475-10484
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2046462167
Cited by
108
References
71
Citations by year
2025: 1 · 2024: 1 · 2023: 2 · 2022: 2 · 2021: 1 · 2020: 1 · 2018: 1 · 2017: 1 · 2016: 2 · 2015: 2 · 2014: 4 · 2013: 3 · 2012: 2
FWCI
3.77
Type
journal article
Language
en
Open access
Locations
  • Journal of Biological Chemistry (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • NPARC (acceptedVersion)
  • INFM-OAR (INFN Catania) (submittedVersion, cc-by)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
Grb10, adaptor proteins, MEK1, SH2 domain, protein-protein interaction, mitogen-activated protein kinase, epidermal growth factor receptor, insulin receptor, proline-rich region, apoptosis, Grb7, Grb14
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Binding Sites, Cell Line, DNA, Humans, Molecular Sequence Data, Phosphorylation, Protein Binding, Protein-Tyrosine Kinases, Proteins, Sequence Homology, Nucleic Acid, Apoptosis, Protein Serine-Threonine Kinases, Point Mutation, Sequence Homology, Amino Acid, Proto-Oncogene Proteins c-raf, Mitogen-Activated Protein Kinase Kinases, MAP Kinase Kinase 1, GRB10 Adaptor Protein

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