1DYK

Laminin alpha 2 chain LG4-5 domain pair


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.233 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure of the C-Terminal Laminin G-Like Domain Pair of the Laminin Alpha 2 Chain Harbouring Binding Sites for Alpha-Dystroglycan and Heparin

Tisi, D.Talts, J.F.Timpl, R.Hohenester, E.

(2000) Embo J. 19: 1432

  • DOI: 10.1093/emboj/19.7.1432
  • Also Cited By: 2JD4, 1OKQ

  • PubMed Abstract: 
  • The laminins are large heterotrimeric glycoproteins with fundamental roles in basement membrane architecture and function. The C-terminus of the laminin alpha chain contains a tandem of five laminin G-like (LG) domains. We report the 2.0 A crystal st ...

    The laminins are large heterotrimeric glycoproteins with fundamental roles in basement membrane architecture and function. The C-terminus of the laminin alpha chain contains a tandem of five laminin G-like (LG) domains. We report the 2.0 A crystal structure of the laminin alpha2 LG4-LG5 domain pair, which harbours binding sites for heparin and the cell surface receptor alpha-dystroglycan, and is 41% identical to the laminin alpha1 E3 fragment. LG4 and LG5 are arranged in a V-shaped fashion related by a 110 degrees rotation about an axis passing near the domain termini. An extended N-terminal segment is disulfide bonded to LG5 and stabilizes the domain pair. Two calcium ions, one each in LG4 and LG5, are located 65 A apart at the tips of the domains opposite the polypeptide termini. An extensive basic surface region between the calcium sites is proposed to bind alpha-dystroglycan and heparin. The LG4-LG5 structure was used to construct a model of the laminin LG1-LG5 tandem and interpret missense mutations underlying protein S deficiency.


    Related Citations: 
    • Structural Analysis and Proteolytic Processing of Recombinant G Domain of Mouse Laminin Alpha 2 Chain
      Talts, J.F.,Mann, K.,Yamada, Y.,Timpl, R.
      (1998) FEBS Lett. 426: 71
    • The Crystal Structure of a Laminin G-Like Module Reveals the Molecular Basis of Alpha-Dystroglycan Binding to Laminins, Perlecan and Agrin
      Hohenester, E.,Tisi, D.,Talts, J.F.,Timpl, R.
      (1999) Mol.Cell 4: 783


    Organizational Affiliation

    Abteilung Proteinchemie, Max-Planck-Institut für Biochemie, D-82152 Martinsried, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LAMININ ALPHA 2 CHAIN
A
394Mus musculusMutation(s): 0 
Gene Names: Lama2
Find proteins for Q60675 (Mus musculus)
Go to UniProtKB:  Q60675
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Free: 0.261 
  • R-Value Work: 0.233 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 70.600α = 90.00
b = 111.500β = 90.00
c = 124.800γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
SCALAdata scaling
MOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2001-02-04
    Type: Initial release
  • Version 1.1: 2011-05-07
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance