Cited by 50Axon Guidance and Neuronal SignalingReceptor Mechanisms and SignalingChemical Synthesis and Analysis

Distinctive binding of three antagonistic peptides to the ephrin-binding pocket of the EphA4 receptor

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Lamberto, Ilaria, Qin, Haina, Noberini, Roberta, Premkumar, Lakshmanane, Bourgin, Caroline, Riedl, Stefan J., Song, Jianxing, Pasquale, Elena B.·2012·Biochemical Journal

Abstract

The EphA4 receptor tyrosine kinase interacts with ephrin ligands to regulate many processes, ranging from axon guidance and nerve regeneration to cancer malignancy. Thus antagonists that inhibit ephrin binding to EphA4 could be useful for a variety of research and therapeutic applications. In the present study we characterize the binding features of three antagonistic peptides (KYL, APY and VTM) that selectively target EphA4 among the Eph receptors. Isothermal titration calorimetry analysis demonstrated that all three peptides bind to the ephrin-binding domain of EphA4 with low micromolar affinity. Furthermore, the effects of a series of EphA4 mutations suggest that the peptides interact in different ways with the ephrin-binding pocket of EphA4. Chemical-shift changes observed by NMR spectroscopy upon binding of the KYL peptide involve many EphA4 residues, consistent with extensive interactions and possibly receptor conformational changes. Additionally, systematic replacement of each of the 12 amino acids of KYL and VTM identify the residues critical for EphA4, binding. The peptides exhibit a long half-life in cell culture medium which, with their substantial binding affinity and selectivity for EphA4, makes them excellent research tools to modulate EphA4 function.

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Authors
Lamberto, I., Qin, H., Noberini, R., Premkumar, L., Bourgin, C., Riedl, S. J., Song, J., & Pasquale, E. B.
Affiliations
  • Sanford Burnham Prebys Medical Discovery Institute (US)
  • National University of Singapore (SG)
Corresponding author
  • Lamberto, Ilaria
  • Noberini, Roberta
  • Premkumar, Lakshmanane
  • Bourgin, Caroline
Venue
Biochemical Journal
Published
2012-06-15
Volume
445
Issue
1
Pages
47-56
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2110110458
Cited by
48
References
58
Citations by year
2026: 1 · 2023: 3 · 2022: 4 · 2021: 6 · 2020: 2 · 2019: 2 · 2018: 3 · 2017: 3 · 2016: 1 · 2015: 8 · 2014: 10 · 2013: 2 · 2012: 3
FWCI
3.03
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • National University of Singapore (submittedVersion)
Funders
  • National Cancer Institute (P01CA138390, CA138390)
  • National Institute of Neurological Disorders and Stroke (NS067502, R21NS067502)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Axon Guidance and Neuronal Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Chemical Synthesis and Analysis
Keywords
peptide-receptor binding, receptor tyrosine kinase, binding affinity, binding site residues, receptor conformational change, peptide half-life
MeSH terms
Animals, Brain, Calorimetry, Cells, Cultured, Enzyme-Linked Immunosorbent Assay, Humans, Image Processing, Computer-Assisted, Male, Models, Molecular, Mutation, Neuroblastoma, Magnetic Resonance Spectroscopy, Peptide Fragments, Prostatic Neoplasms, Protein Binding, Protein Conformation, Signal Transduction, Mutagenesis, Site-Directed, Receptor, EphA4, Ephrins, Quantum Dots, Mice

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