2MES

Backbone 1H, 13C, 15N resonance assignments of calcium-bound calmodulin in complex with PSD95 N-terminal peptide


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Capping of the N-terminus of PSD-95 by calmodulin triggers its postsynaptic release.

Zhang, Y.Matt, L.Patriarchi, T.Malik, Z.A.Chowdhury, D.Park, D.K.Renieri, A.Ames, J.B.Hell, J.W.

(2014) Embo J. 33: 1341-1353

  • DOI: 10.1002/embj.201488126

  • PubMed Abstract: 
  • Postsynaptic density protein-95 (PSD-95) is a central element of the postsynaptic architecture of glutamatergic synapses. PSD-95 mediates postsynaptic localization of AMPA receptors and NMDA receptors and plays an important role in synaptic plasticit ...

    Postsynaptic density protein-95 (PSD-95) is a central element of the postsynaptic architecture of glutamatergic synapses. PSD-95 mediates postsynaptic localization of AMPA receptors and NMDA receptors and plays an important role in synaptic plasticity. PSD-95 is released from postsynaptic membranes in response to Ca(2+) influx via NMDA receptors. Here, we show that Ca(2+)/calmodulin (CaM) binds at the N-terminus of PSD-95. Our NMR structure reveals that both lobes of CaM collapse onto a helical structure of PSD-95 formed at its N-terminus (residues 1-16). This N-terminal capping of PSD-95 by CaM blocks palmitoylation of C3 and C5, which is required for postsynaptic PSD-95 targeting and the binding of CDKL5, a kinase important for synapse stability. CaM forms extensive hydrophobic contacts with Y12 of PSD-95. The PSD-95 mutant Y12E strongly impairs binding to CaM and Ca(2+)-induced release of PSD-95 from the postsynaptic membrane in dendritic spines. Our data indicate that CaM binding to PSD-95 serves to block palmitoylation of PSD-95, which in turn promotes Ca(2+)-induced dissociation of PSD-95 from the postsynaptic membrane.


    Organizational Affiliation

    Department of Chemistry, University of California, Davis, CA, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
A
148Xenopus laevisGene Names: calm2-b
Find proteins for P0DP35 (Xenopus laevis)
Go to UniProtKB:  P0DP35
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Disks large homolog 4
B
71Homo sapiensGene Names: DLG4 (PSD95)
Find proteins for P78352 (Homo sapiens)
Go to Gene View: DLG4
Go to UniProtKB:  P78352
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: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the lowest energy 

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-09-26 
  • Released Date: 2014-12-24 
  • Deposition Author(s): Zhang, Y., Ames, J.B.

Revision History 

  • Version 1.0: 2014-12-24
    Type: Initial release