2V7D

14-3-3 protein zeta in complex with Thr758 phosphorylated integrin beta2 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history. 


Literature

Beta2 Integrin Phosphorylation on Thr758 Acts as a Molecular Switch to Regulate 14-3-3 and Filamin Binding.

Takala, H., Nurminen, E., Nurmi, S.M., Aatonen, M., Strandin, T., Takatalo, M., Kiema, T., Gahmberg, C.G., Ylanne, J., Fagerholm, S.C.

(2008) Blood 112: 1853

  • DOI: 10.1182/blood-2007-12-127795
  • Primary Citation of Related Structures:  
    2V7D, 2JF1

  • PubMed Abstract: 

    • Leukocyte integrins of the beta2 family are essential for immune cell-cell adhesion. In activated cells, beta2 integrins are phosphorylated on the cytoplasmic Thr758, leading to 14-3-3 protein recruitment to the beta2 integrin. The mutation of this p ...

    Leukocyte integrins of the beta2 family are essential for immune cell-cell adhesion. In activated cells, beta2 integrins are phosphorylated on the cytoplasmic Thr758, leading to 14-3-3 protein recruitment to the beta2 integrin. The mutation of this phosphorylation site impairs cell adhesion, actin reorganization, and cell spreading. Thr758 is contained in a Thr triplet of beta2 that also mediates binding to filamin. Here, we investigated the binding of filamin, talin, and 14-3-3 proteins to phosphorylated and unphosphorylated beta2 integrins by biochemical methods and x-ray crystallography. 14-3-3 proteins bound only to the phosphorylated integrin cytoplasmic peptide, with a high affinity (K(d), 261 nM), whereas filamin bound only the unphosphorylated integrin cytoplasmic peptide (K(d), 0.5 mM). Phosphorylation did not regulate talin binding to beta2 directly, but 14-3-3 was able to outcompete talin for the binding to phosphorylated beta2 integrin. X-ray crystallographic data clearly explained how phosphorylation eliminated filamin binding and induced 14-3-3 protein binding. Filamin knockdown in T cells led to an increase in stimulated cell adhesion to ICAM-1-coated surfaces. Our results suggest that the phosphorylation of beta2 integrins on Thr758 acts as a molecular switch to inhibit filamin binding and allow 14-3-3 protein binding to the integrin cytoplasmic domain, thereby modulating T-cell adhesion.

    Organizational Affiliation: 

    Department of Biological and Environmental Science and Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
14-3-3 PROTEIN ZETA/DELTAA, B, C, D247Bos taurusMutation(s): 0 
Gene Names: YWHAZ
Find proteins for P63103 (Bos taurus)
Explore P63103 
Go to UniProtKB:  P63103
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
INTEGRIN BETA CHAIN, BETA 2 VARIANTP, Q, R, S10Homo sapiensMutation(s): 0 
Gene Names: ITGB2, CD18, MFI7
Find proteins for P05107 (Homo sapiens)
Explore P05107 
Go to UniProtKB:  P05107
NIH Common Fund Data Resources
PHAROS  P05107
GTEx  ENSG00000160255
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO		P,Q,R,SL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.273 
  • R-Value Work: 0.228 
  • R-Value Observed: 0.228 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 94.92α = 90
b = 94.92β = 90
c = 233.6γ = 120
Software Package:
Software NamePurpose
CNSrefinement
XDSdata reduction
XSCALEdata scaling
PHASERphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2007-07-30 
  • Released Date: 2008-06-24 
    • Deposition Author(s): Takala, H., Ylanne, J.

Revision History 

  • Version 1.0: 2008-06-24
    Type: Initial release
  • Version 1.1: 2011-05-08
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance