Crystal Structure of the LNK SH2 Domain in Complex with an EPOR pY454 Phosphopeptide

Experimental Data Snapshot

  • Resolution: 2.30 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 

wwPDB Validation   3D Report Full Report

This is version 1.3 of the entry. See complete history


Structural and functional analysis of target recognition by the lymphocyte adaptor protein LNK.

Morris, R.Zhang, Y.Ellyard, J.I.Vinuesa, C.G.Murphy, J.M.Laktyushin, A.Kershaw, N.J.Babon, J.J.

(2021) Nat Commun 12: 6110-6110

  • DOI: https://doi.org/10.1038/s41467-021-26394-6
  • Primary Citation of Related Structures:  
    7R8W, 7R8X

  • PubMed Abstract: 

    The SH2B family of adaptor proteins, SH2-B, APS, and LNK are key modulators of cellular signalling pathways. Whilst SH2-B and APS have been partially structurally and biochemically characterised, to date there has been no such characterisation of LNK. Here we present two crystal structures of the LNK substrate recognition domain, the SH2 domain, bound to phosphorylated motifs from JAK2 and EPOR, and biochemically define the basis for target recognition. The LNK SH2 domain adopts a canonical SH2 domain fold with an additional N-terminal helix. Targeted analysis of binding to phosphosites in signalling pathways indicated that specificity is conferred by amino acids one- and three-residues downstream of the phosphotyrosine. Several mutations in LNK showed impaired target binding in vitro and a reduced ability to inhibit signalling, allowing an understanding of the molecular basis of LNK dysfunction in variants identified in patients with myeloproliferative disease.

  • Organizational Affiliation

    Walter and Eliza Hall Institute of Medical Research, 1G Royal Parade, Parkville, VIC, 3052, Australia.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
SH2B adapter protein 3111Mus musculusMutation(s): 0 
Gene Names: Sh2b3Lnk
Find proteins for O09039 (Mus musculus)
Explore O09039 
Go to UniProtKB:  O09039
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO09039
Sequence Annotations
  • Reference Sequence

Find similar proteins by:  Sequence   |   3D Structure  

Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
EPOR pY454 phosphopeptideB [auth C]8Homo sapiensMutation(s): 0 
Sequence Annotations
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChains TypeFormula2D DiagramParent
Query on PTR
Experimental Data & Validation

Experimental Data

  • Resolution: 2.30 Å
  • R-Value Free: 0.231 
  • R-Value Work: 0.197 
  • R-Value Observed: 0.200 
  • Space Group: P 61
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 86.157α = 90
b = 86.157β = 90
c = 38.052γ = 120
Software Package:
Software NamePurpose
XDSdata reduction
XDSdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Health and Medical Research Council (NHMRC, Australia)Australia--

Revision History  (Full details and data files)

  • Version 1.0: 2021-10-06
    Type: Initial release
  • Version 1.1: 2021-11-03
    Changes: Database references
  • Version 1.2: 2023-10-18
    Changes: Data collection, Refinement description
  • Version 1.3: 2023-11-15
    Changes: Data collection