Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PQS (software)

Macromolecule Content

• Total Structure Weight: 68.18 kDa 
• Atom Count: 4056 
• Residue Count: 520 
• Unique protein chains: 1

2WJS

Crystal structure of the LG1-3 region of the laminin alpha2 chain

• DOI: 10.2210/pdb2WJS/pdb

• Classification: CELL ADHESION
• Organism(s): Mus musculus
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2009-05-28 Released: 2009-06-23 
• Deposition Author(s): Carafoli, F., Clout, N.J., Hohenester, E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.266 
• R-Value Work: 0.212 
• R-Value Observed: 0.212 

Literature

Crystal Structure of the Lg1-3 Region of the Laminin {Alpha}2 Chain.

Carafoli, F., Clout, N.J., Hohenester, E.

(2009) J Biol Chem 284: 22786

• PubMed: 19553699 
• DOI: 10.1074/jbc.M109.026658
• Primary Citation of Related Structures:  
  2WJS


• PubMed Abstract: 
  

Laminins are large heterotrimeric glycoproteins with many essential functions in basement membrane assembly and function. Cell adhesion to laminins is mediated by a tandem of five laminin G-like (LG) domains at the C terminus of the alpha chain. Integrin binding requires an intact LG1-3 region, as well as contributions from the coiled coil formed by the alpha, beta, and gamma chains. We have determined the crystal structure at 2.8-A resolution of the LG1-3 region of the laminin alpha2 chain (alpha 2LG1-3). The three LG domains adopt typical beta-sandwich folds, with canonical calcium binding sites in LG1 and LG2. LG2 and LG3 interact through a substantial interface, but LG1 is completely dissociated from the LG2-3 pair. We suggest that the missing gamma chain tail may be required to stabilize the interaction between LG1 and LG2-3 in the biologically active conformation. A global analysis of N-linked glycosylation sites shows that the beta-sandwich faces of LG1 are free of carbohydrate modifications in all five laminin alpha chains, suggesting that these surfaces may harbor the integrin binding site. The alpha 2LG1-3 structure provides the first atomic view of the integrin binding region of laminins.

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Organizational Affiliation: 

Department of Life Sciences, Imperial College London, London SW7 2AZ, United Kingdom.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LAMININ SUBUNIT ALPHA-2	A	608	Mus musculus	Mutation(s): 0  Gene Names: Lama2
Find proteins for Q60675 (Mus musculus) Explore Q60675  Go to UniProtKB:  Q60675

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NAG	A	2-acetamido-2-deoxy-beta-D-glucopyranose C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N
CA	A	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.80 Å
• R-Value Free: 0.266 
• R-Value Work: 0.212 
• R-Value Observed: 0.212 
• Space Group: P 6₅

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 138.829	α = 90
b = 138.829	β = 90
c = 73.895	γ = 120

Software Package:

Software Name	Purpose
CNS	refinement
MOSFLM	data reduction
SCALA	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2009-05-28 
• Released Date: 2009-06-23 
Deposition Author(s): Carafoli, F., Clout, N.J., Hohenester, E.

Revision History 

• Version 1.0: 2009-06-23
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2020-07-29
  Type: Remediation
  Reason: Carbohydrate remediation
  Changes: Data collection, Derived calculations, Other, Structure summary