3BIW

Crystal structure of the Neuroligin-1/Neurexin-1beta synaptic adhesion complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.246 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structures of Neuroligin-1 and the Neuroligin-1/Neurexin-1beta Complex Reveal Specific Protein-Protein and Protein-Ca(2+) Interactions.

Arac, D.Boucard, A.A.Ozkan, E.Strop, P.Newell, E.Sudhof, T.C.Brunger, A.T.

(2007) Neuron 56: 992-1003

  • DOI: 10.1016/j.neuron.2007.12.002
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Neurexins and neuroligins provide trans-synaptic connectivity by the Ca2+-dependent interaction of their alternatively spliced extracellular domains. Neuroligins specify synapses in an activity-dependent manner, presumably by binding to neurexins. He ...

    Neurexins and neuroligins provide trans-synaptic connectivity by the Ca2+-dependent interaction of their alternatively spliced extracellular domains. Neuroligins specify synapses in an activity-dependent manner, presumably by binding to neurexins. Here, we present the crystal structures of neuroligin-1 in isolation and in complex with neurexin-1 beta. Neuroligin-1 forms a constitutive dimer, and two neurexin-1 beta monomers bind to two identical surfaces on the opposite faces of the neuroligin-1 dimer to form a heterotetramer. The neuroligin-1/neurexin-1 beta complex exhibits a nanomolar affinity and includes a large binding interface that contains bound Ca2+. Alternatively spliced sites in neurexin-1 beta and in neuroligin-1 are positioned nearby the binding interface, explaining how they regulate the interaction. Structure-based mutations of neuroligin-1 at the interface disrupt binding to neurexin-1 beta, but not the folding of neuroligin-1 and confirm the validity of the binding interface of the neuroligin-1/neurexin-1 beta complex. Our results provide molecular insights for understanding the role of cell-adhesion proteins in synapse function.


    Organizational Affiliation

    Howard Hughes Medical Institute, Stanford University, Stanford, CA 94305, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Neuroligin-1
A, B, C, D
574Rattus norvegicusMutation(s): 0 
Gene Names: Nlgn1
Find proteins for Q62765 (Rattus norvegicus)
Go to UniProtKB:  Q62765
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Neurexin-1-beta
E, F, G, H
243Rattus norvegicusMutation(s): 0 
Gene Names: Nrxn1
Find proteins for Q63372 (Rattus norvegicus)
Go to UniProtKB:  Q63372
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
E, F, G
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
NAG
Query on NAG

Download SDF File 
Download CCD File 
A, B, C, D, E, F, G
N-ACETYL-D-GLUCOSAMINE
C8 H15 N O6
OVRNDRQMDRJTHS-FMDGEEDCSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.246 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 229.830α = 90.00
b = 148.796β = 90.38
c = 123.602γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
PDB_EXTRACTdata extraction
HKL-2000data reduction
HKL-2000data scaling
SCALEPACKdata scaling
PHASERphasing
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Non-polymer description, Version format compliance
  • Version 1.2: 2017-08-23
    Type: Refinement description, Source and taxonomy
  • Version 1.3: 2017-10-25
    Type: Refinement description