9DZ5 | pdb_00009dz5

Crystal structure of integrin beta-2 tail bound to the FERM-folded talin head domain with a D397R mutation

  • Classification: CELL ADHESION
  • Organism(s): Mus musculus
  • Expression System: Escherichia coli BL21(DE3)
  • Mutation(s): Yes 

  • Deposited: 2024-10-15 Released: 2025-04-23 
  • Deposition Author(s): Wu, J., Gao, T.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free: 
    0.224 (Depositor), 0.221 (DCC) 
  • R-Value Work: 
    0.198 (Depositor), 0.197 (DCC) 
  • R-Value Observed: 
    0.199 (Depositor) 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Molecular basis of beta 2 integrin activation by talin unveils subunit-specific mechanisms of integrin signaling.

Gao, T.Maskalenko, N.A.Kabir, S.Campbell, K.S.Wu, J.

(2025) Cell Rep 44: 115607-115607

  • DOI: https://doi.org/10.1016/j.celrep.2025.115607
  • Primary Citation of Related Structures:  
    8T0D, 9C1T, 9DZ5

  • PubMed Abstract: 

    Integrins consist of 24 species, each with unique tissue expression profiles and distinct biological functions. The β subunit of integrin interacts with the FERM-folded head domain of talin through an NPxY/F motif, triggering integrin activation. Although this motif is conserved across most integrin-β subunits, the precise molecular mechanism governing talin's selective recognition of different integrin-β subunits remains unclear. We identify two distinct configurations of the talin head when interacting with β2 and β3 integrins, providing critical insights into subunit-specific recognition of integrins. Structural studies reveal that mutations at the subdomain interface of the talin head can shift its β2-bound configuration to a β3-bound configuration. This shift enhances β2-integrin affinity, leading to increased lymphocyte function-associated antigen-1 (LFA-1)-mediated natural killer cell activity. Together, our data elucidate the structural basis of talin's role in mediating integrin activation in a subunit-specific manner and advance our understanding of how talin may regulate diverse functions of various integrin species.


  • Organizational Affiliation
    • Cancer Signaling and Microenvironment Program, Fox Chase Cancer Center, Philadelphia, PA 19111, USA.

Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Talin-1411Mus musculusMutation(s): 1 
Gene Names: Tln1Tln
UniProt
Find proteins for P26039 (Mus musculus)
Explore P26039 
Go to UniProtKB:  P26039
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP26039
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.74 Å
  • R-Value Free:  0.224 (Depositor), 0.221 (DCC) 
  • R-Value Work:  0.198 (Depositor), 0.197 (DCC) 
  • R-Value Observed: 0.199 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 110.399α = 90
b = 66.886β = 90
c = 68.226γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
pointlessdata scaling
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Released Date: 2025-04-23 
  • Deposition Author(s): Wu, J., Gao, T.

Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2025-04-23
    Type: Initial release
  • Version 1.1: 2025-05-07
    Changes: Database references
  • Version 1.2: 2025-05-14
    Changes: Database references