5NB1

Crystal structures of homooligomers of collagen type IV. alpha4NC1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history


Literature

Structures of collagen IV globular domains: insight into associated pathologies, folding and network assembly.

Casino, P.Gozalbo-Rovira, R.Rodriguez-Diaz, J.Banerjee, S.Boutaud, A.Rubio, V.Hudson, B.G.Saus, J.Cervera, J.Marina, A.

(2018) IUCrJ 5: 765-779

  • DOI: 10.1107/S2052252518012459
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Basement membranes are extracellular structures of epithelia and endothelia that have collagen IV scaffolds of triple α-chain helical protomers that associate end-to-end, forming networks. The molecular mechanisms by which the noncollagenous C-termin ...

    Basement membranes are extracellular structures of epithelia and endothelia that have collagen IV scaffolds of triple α-chain helical protomers that associate end-to-end, forming networks. The molecular mechanisms by which the noncollagenous C-terminal domains of α-chains direct the selection and assembly of the α1α2α1 and α3α4α5 hetero-oligomers found in vivo remain obscure. Autoantibodies against the noncollagenous domains of the α3α4α5 hexamer or mutations therein cause Goodpasture's or Alport's syndromes, respectively. To gain further insight into oligomer-assembly mechanisms as well as into Goodpasture's and Alport's syndromes, crystal structures of non-collagenous domains produced by recombinant methods were determined. The spontaneous formation of canonical homohexamers (dimers of trimers) of these domains of the α1, α3 and α5 chains was shown and the components of the Goodpasture's disease epitopes were viewed. Crystal structures of the α2 and α4 non-collagenous domains generated by recombinant methods were also determined. These domains spontaneously form homo-oligomers that deviate from the canonical architectures since they have a higher number of subunits (dimers of tetramers and of hexamers, respectively). Six flexible structural motifs largely explain the architectural variations. These findings provide insight into noncollagenous domain folding, while supporting the in vivo operation of extrinsic mechanisms for restricting the self-assembly of noncollagenous domains. Intriguingly, Alport's syndrome missense mutations concentrate within the core that nucleates the folding of the noncollagenous domain, suggesting that this syndrome, when owing to missense changes, is a folding disorder that is potentially amenable to pharmacochaperone therapy.


    Organizational Affiliation

    CIBER de Enfermedades Raras (CIBERER-ISCIII), Spain.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Collagen alpha-4(IV) chain
A, B, C, D, E, F
230Homo sapiensMutation(s): 0 
Gene Names: COL4A4
Find proteins for P53420 (Homo sapiens)
Go to UniProtKB:  P53420
NIH Common Fund Data Resources
PHAROS  P53420
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.82 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.232 
  • R-Value Observed: 0.234 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 145.58α = 90
b = 167.561β = 90
c = 155.412γ = 90
Software Package:
Software NamePurpose
SCALAdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data

  • Deposited Date: 2017-02-28 
  • Released Date: 2018-09-12 
  • Deposition Author(s): Casino, P., Marina, A.

Funding OrganizationLocationGrant Number
Spanish Ministry of Economy and CompetitivenessSpainBIO2013-42619-P
Spanish Ministry of Economy and CompetitivenessSpainBFU2016-78606-P

Revision History 

  • Version 1.0: 2018-09-12
    Type: Initial release
  • Version 1.1: 2018-10-24
    Changes: Data collection, Database references
  • Version 1.2: 2018-11-28
    Changes: Data collection, Database references
  • Version 1.3: 2019-10-09
    Changes: Data collection