5XQ0

Structural basis of kindlin-mediated integrin recognition and activation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of kindlin-mediated integrin recognition and activation

Li, H.Deng, Y.Sun, K.Yang, H.Liu, J.Wang, M.Zhang, Z.Lin, J.Wu, C.Wei, Z.Yu, C.

(2017) Proc Natl Acad Sci U S A 114: 9349-9354

  • DOI: 10.1073/pnas.1703064114
  • Primary Citation of Related Structures:  
    5XPZ, 5XPY, 5XQ1, 5XQ0

  • PubMed Abstract: 
  • Kindlins and talins are integrin-binding proteins that are critically involved in integrin activation, an essential process for many fundamental cellular activities including cell-matrix adhesion, migration, and proliferation. As FERM-domain-containing proteins, talins and kindlins, respectively, bind different regions of β-integrin cytoplasmic tails ...

    Kindlins and talins are integrin-binding proteins that are critically involved in integrin activation, an essential process for many fundamental cellular activities including cell-matrix adhesion, migration, and proliferation. As FERM-domain-containing proteins, talins and kindlins, respectively, bind different regions of β-integrin cytoplasmic tails. However, compared with the extensively studied talin, little is known about how kindlins specifically interact with integrins and synergistically enhance their activation by talins. Here, we determined crystal structures of kindlin2 in the apo-form and the β1- and β3-integrin bound forms. The apo-structure shows an overall architecture distinct from talins. The complex structures reveal a unique integrin recognition mode of kindlins, which combines two binding motifs to provide specificity that is essential for integrin activation and signaling. Strikingly, our structures uncover an unexpected dimer formation of kindlins. Interrupting dimer formation impairs kindlin-mediated integrin activation. Collectively, the structural, biochemical, and cellular results provide mechanistic explanations that account for the effects of kindlins on integrin activation as well as for how kindlin mutations found in patients with Kindler syndrome and leukocyte-adhesion deficiency may impact integrin-mediated processes.


    Organizational Affiliation

    Shenzhen Key Laboratory of Cell Microenvironment, Southern University of Science and Technology, Shenzhen 518055, China.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Fermitin family homolog 2,Integrin beta-1A, B485Mus musculusMutation(s): 0 
Gene Names: Fermt2Plekhc1Itgb1
UniProt
Find proteins for P09055 (Mus musculus)
Explore P09055 
Go to UniProtKB:  P09055
Find proteins for Q8CIB5 (Mus musculus)
Explore Q8CIB5 
Go to UniProtKB:  Q8CIB5
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GOL
Query on GOL

Download Ideal Coordinates CCD File 
C [auth A]GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.75 Å
  • R-Value Free: 0.284 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 
  • Space Group: P 32 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 75.866α = 90
b = 75.866β = 90
c = 384.219γ = 120
Software Package:
Software NamePurpose
PHENIXrefinement
HKL-2000data collection
HKL-2000data scaling
PDB_EXTRACTdata extraction
HKL-2000data reduction
PHASERphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-07-26
    Type: Initial release
  • Version 1.1: 2017-08-09
    Changes: Database references
  • Version 1.2: 2017-09-06
    Changes: Database references