Cited by 163Cytokine Signaling Pathways and InteractionsProtein Structure and DynamicsProtein Tyrosine Phosphatases

The Structure of SOCS3 Reveals the Basis of the Extended SH2 Domain Function and Identifies an Unstructured Insertion That Regulates Stability

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Babon, Jeffrey J., McManus, Edward J., Yao, Shenggen, DeSouza, David P., Mielke, Lisa A., Sprigg, Naomi S., Willson, Tracy A., Hilton, Douglas J. +4 more·2006·Molecular Cell

Abstract

SOCS3 is essential for regulating the extent, duration, and specificity of cellular responses to cytokines such as G-CSF and IL-6. Here we describe the solution structure of SOCS3, the first structure determined for any SOCS protein, in complex with a phosphotyrosine-containing peptide from the IL-6 receptor signaling subunit gp130. The structure of the complex shows that seven peptide residues form a predominantly hydrophobic binding motif. Regions outside the SOCS3 SH2 domain are important for ligand binding, in particular, a single 15 residue alpha helix immediately N-terminal to the SH2 domain makes direct contacts with the phosphotyrosine binding loop and, in part, determines its geometry. The SH2 domain itself is remarkable in that it contains a 35 residue unstructured PEST motif insertion that is not required for STAT inhibition. The PEST motif increases SOCS3 turnover and affects its degradation pathway, implying that it has an important regulatory role inside the cell.

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Crossref · 10.1016/j.molcel.2006.03.024

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  • Available peptide co-structures for SOCS3 show an expanded hydrophobic pocket that may be more amenable to targeting.

    “the available peptide co-structures for SOCS3 (refs 107,108,109 ) show an expanded hydrophobic pocket that may be more amenable to targeting”

    From Targeted protein degradation: expanding the toolbox (2019) · cites this paper as [109]

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Authors
Babon, J. J., McManus, E. J., Yao, S., DeSouza, D. P., Mielke, L. A., Sprigg, N. S., Willson, T. A., Hilton, D. J., Nicola, N. A., Baca, M., Nicholson, S. E., & Norton, R. S.
Affiliations
Walter and Eliza Hall Institute of Medical Research (AU)
Corresponding author
Babon, Jeffrey J.
Venue
Molecular Cell
Publisher
Elsevier BV
Published
2006-04
Volume
22
Issue
2
Pages
205-216
ISSN
1097-2765 (ISSN-L)
OpenAlex
W2004059492
Cited by
163
References
44
Citations by year
2026: 4 · 2025: 5 · 2024: 4 · 2023: 4 · 2022: 3 · 2021: 9 · 2020: 2 · 2019: 13 · 2018: 9 · 2017: 6 · 2016: 5 · 2015: 11 · 2014: 13 · 2013: 7 · 2012: 13
FWCI
6.87
Type
journal article
Language
en
Open access
Locations
  • Molecular Cell (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Cancer Institute (CA22556)
Topics
  • Health Sciences › Medicine › Oncology › Cytokine Signaling Pathways and Interactions
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Structure and Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Tyrosine Phosphatases
Keywords
SOCS3, SH2 domain, solution structure, gp130, IL-6 receptor signaling, phosphotyrosine binding, PEST motif, protein stability, protein degradation, cytokine signaling
MeSH terms
Suppressor of Cytokine Signaling 3 Protein, Amino Acid Sequence, Binding Sites, Cell Line, Cloning, Molecular, Half-Life, Humans, Luciferases, Models, Molecular, Molecular Sequence Data, Phosphoproteins, Protein Binding, Spectrum Analysis, Raman, Transfection, Mutagenesis, Insertional, Sequence Homology, Amino Acid, Protein Structure, Secondary, Protein Structure, Tertiary, Genes, Reporter, src Homology Domains, Nuclear Magnetic Resonance, Biomolecular, Amino Acid Motifs, Suppressor of Cytokine Signaling Proteins, Hydrophobic and Hydrophilic Interactions

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