1UZJ

Integrin binding cbEGF22-TB4-cbEGF33 fragment of human fibrillin-1, holo form.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.247 

Starting Model: other
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wwPDB Validation   3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structure of the Integrin Binding Fragment from Fibrillin-1 Gives New Insights Into Microfibril Organization

Lee, S.S.J.Knott, V.Jovanovi, J.Harlos, K.Grimes, J.Choulier, L.Mardon, H.Stuart, D.I.Handford, P.A.

(2004) Structure 12: 717

  • DOI: https://doi.org/10.1016/j.str.2004.02.023
  • Primary Citation of Related Structures:  
    1UZJ, 1UZK, 1UZP, 1UZQ

  • PubMed Abstract: 

    Human fibrillin-1, the major structural protein of extracellular matrix (ECM) 10-12 nm microfibrils, is dominated by 43 calcium binding epidermal growth factor-like (cbEGF) and 7 transforming growth factor beta binding protein-like (TB) domains. Crystal structures reveal the integrin binding cbEGF22-TB4-cbEGF23 fragment of human fibrillin-1 to be a Ca(2+)-rigidified tetragonal pyramid. We suggest that other cbEGF-TB pairs within the fibrillins may adopt a similar orientation to cbEGF22-TB4. In addition, we have located a flexible RGD integrin binding loop within TB4. Modeling, cell attachment and spreading assays, immunocytochemistry, and surface plasmon resonance indicate that cbEGF22 bound to TB4 is a requirement for integrin activation and provide insight into the molecular basis of the fibrillin-1 interaction with alphaVbeta3. In light of our data, we propose a novel model for the assembly of the fibrillin microfibril and a mechanism to explain its extensibility.


  • Organizational Affiliation

    The Henry Wellcome Building of Genomic Medicine, Roosevelt Drive, Oxford OX3 7BN, United Kingdom.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
FIBRILLIN-1
A, B, C
162Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P35555 (Homo sapiens)
Explore P35555 
Go to UniProtKB:  P35555
PHAROS:  P35555
GTEx:  ENSG00000166147 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP35555
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.25 Å
  • R-Value Free: 0.318 
  • R-Value Work: 0.247 
  • R-Value Observed: 0.247 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 43.1α = 90
b = 105.6β = 104.2
c = 65γ = 90
Software Package:
Software NamePurpose
CNSrefinement
DENZOdata reduction
SCALEPACKdata scaling
CNSphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2004-04-08
    Type: Initial release
  • Version 1.1: 2011-05-07
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-05-01
    Changes: Data collection, Database references, Derived calculations, Refinement description
  • Version 1.4: 2024-10-16
    Changes: Structure summary