Cited by 97Protein Tyrosine PhosphatasesProtein Kinase Regulation and GTPase SignalingMelanoma and MAPK Pathways

Docking sites on mitogen-activated protein kinase (MAPK) kinases, MAPK phosphatases and the Elk-1 transcription factor compete for MAPK binding and are crucial for enzymic activity

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BARDWELL, A. Jane, ABDOLLAHI, Mahsa, BARDWELL, Lee·2003·Biochemical Journal

Abstract

Mitogen-activated protein kinase (MAPK) cascades control gene expression patterns in response to extracellular stimuli. MAPK/ERK (extracellular-signal-regulated kinase) kinases (MEKs) activate MAPKs by phosphorylating them; activated MAPKs, in turn, phosphorylate target transcription factors, and are deactivated by phosphatases. One mechanism for maintaining signal specificity and efficiency is the interaction of MAPKs with their substrates and regulators through high-affinity docking sites. In the present study, we show that peptides corresponding to the MAPK-docking sites of MEK1, MEK2, Ste7, Elk-1 and MAPK phosphatase (MKP)-2 potently inhibit MEK2 phosphorylation of ERK2, ERK2 phosphorylation of Elk-1, and MKP-1 dephosphorylation of ERK2. Each peptide inhibited multiple reactions; for example, the MEK2 peptide inhibited not only MEK2, but also ERK2 and MKP-1. In addition, these docking-site peptides inhibited MEK2—ERK2 binding. The MAPK-docking site of MEK1 also potently stimulated ERK2-mediated phosphorylation of a target site on the same peptide. Control peptides with mutations of conserved basic and hydrophobic residues of the MAPK-docking site consensus lacked biological activity. We conclude that MEKs, MKPs and the Elk-1 transcription factor compete for binding to the same region of ERK2 via protein—protein interactions that are crucial for kinase/phosphatase activity.

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  • The structural and biochemical analysis, together with other studies, clarified the minimal sequence requirements for linear motifs to bind the MAPK docking groove.

    “Our structural and biochemical analysis in combination with other studies clarified the minimal sequence requirements for linear motifs to bind the MAPK docking groove (42-47).”

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Authors
BARDWELL, A. J., ABDOLLAHI, M., & BARDWELL, L.
Affiliations
University of California, Irvine (US)
Venue
Biochemical Journal
Published
2003-03-15
Volume
370
Issue
3
Pages
1077-1085
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2143969780
Cited by
97
References
59
Citations by year
2026: 1 · 2023: 2 · 2022: 2 · 2021: 2 · 2020: 3 · 2019: 1 · 2018: 1 · 2017: 2 · 2016: 1 · 2015: 4 · 2014: 6 · 2013: 2 · 2012: 8
FWCI
3.79
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of General Medical Sciences (GM-60366, R01GM060366)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
Keywords
MEK1, MEK2, ERK2, MKP-1, Ste7, protein-protein interaction, kinase activation, phosphatase dephosphorylation
MeSH terms
Amino Acid Sequence, Binding Sites, DNA-Binding Proteins, Molecular Sequence Data, Peptides, Phosphorylation, Protein Binding, Protein Kinases, Protein-Tyrosine Kinases, Recombinant Fusion Proteins, Transcription Factors, Sequence Alignment, Protein Tyrosine Phosphatases, Protein Serine-Threonine Kinases, Mitogen-Activated Protein Kinase 1, Mitogen-Activated Protein Kinases, Mitogen-Activated Protein Kinase Kinases, MAP Kinase Signaling System, Saccharomyces cerevisiae Proteins, MAP Kinase Kinase 1, MAP Kinase Kinase 2, Dual Specificity Phosphatase 1, Protein Phosphatase 1

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