3V65

Crystal structure of agrin and LRP4 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.207 

wwPDB Validation   3D Report Full Report


This is version 1.0 of the entry. See complete history


Literature

Structural basis of agrin-LRP4-MuSK signaling.

Zong, Y.Zhang, B.Gu, S.Lee, K.Zhou, J.Yao, G.Figueiredo, D.Perry, K.Mei, L.Jin, R.

(2012) Genes Dev 26: 247-258

  • DOI: 10.1101/gad.180885.111
  • Primary Citation of Related Structures:  
    3V64, 3V65

  • PubMed Abstract: 
  • Synapses are the fundamental units of neural circuits that enable complex behaviors. The neuromuscular junction (NMJ), a synapse formed between a motoneuron and a muscle fiber, has contributed greatly to understanding of the general principles of synaptogenesis as well as of neuromuscular disorders ...

    Synapses are the fundamental units of neural circuits that enable complex behaviors. The neuromuscular junction (NMJ), a synapse formed between a motoneuron and a muscle fiber, has contributed greatly to understanding of the general principles of synaptogenesis as well as of neuromuscular disorders. NMJ formation requires neural agrin, a motoneuron-derived protein, which interacts with LRP4 (low-density lipoprotein receptor-related protein 4) to activate the receptor tyrosine kinase MuSK (muscle-specific kinase). However, little is known of how signals are transduced from agrin to MuSK. Here, we present the first crystal structure of an agrin-LRP4 complex, consisting of two agrin-LRP4 heterodimers. Formation of the initial binary complex requires the z8 loop that is specifically present in neuronal, but not muscle, agrin and that promotes the synergistic formation of the tetramer through two additional interfaces. We show that the tetrameric complex is essential for neuronal agrin-induced acetylcholine receptor (AChR) clustering. Collectively, these results provide new insight into the agrin-LRP4-MuSK signaling cascade and NMJ formation and represent a novel mechanism for activation of receptor tyrosine kinases.


    Organizational Affiliation

    Center for Neuroscience, Aging, and Stem Cell Research, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
AgrinA, D [auth C]191Rattus norvegicusMutation(s): 0 
Gene Names: AgrnAgrin
UniProt
Find proteins for P25304 (Rattus norvegicus)
Explore P25304 
Go to UniProtKB:  P25304
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Low-density lipoprotein receptor-related protein 4B, C [auth D]386Rattus norvegicusMutation(s): 0 
Gene Names: Lrp4Megf7
UniProt
Find proteins for Q9QYP1 (Rattus norvegicus)
Explore Q9QYP1 
Go to UniProtKB:  Q9QYP1
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download Ideal Coordinates CCD File 
E [auth A], F [auth C]CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 0.297 
  • R-Value Work: 0.202 
  • R-Value Observed: 0.207 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 83.72α = 90
b = 110.23β = 90
c = 158.11γ = 90
Software Package:
Software NamePurpose
ADSCdata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

  • Deposited Date: 2011-12-18 
  • Released Date: 2012-04-25 
  • Deposition Author(s): Zong, Y., Jin, R.

Revision History  (Full details and data files)

  • Version 1.0: 2012-04-25
    Type: Initial release