6GVL

Second pair of Fibronectin type III domains of integrin beta4 bound to the bullous pemphigoid antigen BP230 (BPAG1e)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.236 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.225 

Starting Model: experimental
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wwPDB Validation   3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Integrin alpha 6 beta 4 Recognition of a Linear Motif of Bullous Pemphigoid Antigen BP230 Controls Its Recruitment to Hemidesmosomes.

Manso, J.A.Gomez-Hernandez, M.Carabias, A.Alonso-Garcia, N.Garcia-Rubio, I.Kreft, M.Sonnenberg, A.de Pereda, J.M.

(2019) Structure 27: 952

  • DOI: https://doi.org/10.1016/j.str.2019.03.016
  • Primary Citation of Related Structures:  
    6GVK, 6GVL

  • PubMed Abstract: 

    Mechanical stability of epithelia requires firm attachment to the basement membrane via hemidesmosomes. Dysfunction of hemidesmosomal proteins causes severe skin-blistering diseases. Two plakins, plectin and BP230 (BPAG1e), link the integrin α6β4 to intermediate filaments in epidermal hemidesmosomes. Here, we show that a linear sequence within the isoform-specific N-terminal region of BP230 binds to the third and fourth FnIII domains of β4. The crystal structure of the complex and mutagenesis analysis revealed that BP230 binds between the two domains of β4. BP230 induces closing of the two FnIII domains that are locked in place by an interdomain ionic clasp required for binding. Disruption of BP230-β4 binding prevents recruitment of BP230 to hemidesmosomes in human keratinocytes, revealing a key role of this interaction for hemidesmosome assembly. Phosphomimetic substitutions in β4 and BP230 destabilize the complex. Thus, our study provides insights into the architecture of hemidesmosomes and potential mechanisms of regulation.


  • Organizational Affiliation

    Instituto de Biología Molecular y Celular del Cáncer, Consejo Superior de Investigaciones Científicas - University of Salamanca, Campus Unamuno, 37007 Salamanca, Spain.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Integrin beta-4214Homo sapiensMutation(s): 0 
Gene Names: ITGB4
UniProt & NIH Common Fund Data Resources
Find proteins for P16144 (Homo sapiens)
Explore P16144 
Go to UniProtKB:  P16144
PHAROS:  P16144
GTEx:  ENSG00000132470 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP16144
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Dystonin30Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for Q03001 (Homo sapiens)
Go to UniProtKB:  Q03001
PHAROS:  Q03001
GTEx:  ENSG00000151914 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ03001-8
Sequence Annotations
Expand
  • Reference Sequence
Experimental Data & Validation

Experimental Data

Unit Cell:
Length ( Å )Angle ( ˚ )
a = 104.52α = 90
b = 60.73β = 113.71
c = 40.78γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
XSCALEdata scaling
PHENIXphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Spanish Ministry of Economy and CompetitivenessSpainBFU2009-08389
Spanish Ministry of Economy and CompetitivenessSpainBFU2015-69499-P

Revision History  (Full details and data files)

  • Version 1.0: 2019-03-20
    Type: Initial release
  • Version 1.1: 2019-05-01
    Changes: Data collection, Database references
  • Version 1.2: 2019-06-19
    Changes: Data collection, Database references
  • Version 1.3: 2024-05-01
    Changes: Data collection, Database references, Refinement description