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 Pharmacology, University of California, Davis, CA, USA Department of Medical Genetics, University of Siena, Siena, Italy.,Department of Pharmacology, University of California, Davis, CA, USA.,Department of Chemistry, University of California, Davis, CA, USA jbames@ucdavis.edu jwhell@ucdavis.edu.,Department of Chemistry, University of California, Davis, CA, USA.,Department of Medical Genetics, University of Siena, Siena, Italy.,Department of Pharmacology, University of California, Davis, CA, USA jbames@ucdavis.edu jwhell@ucdavis.edu.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
A
148Xenopus laevisMutation(s): 0 
Gene Names: calm2-a
Find proteins for P0DP34 (Xenopus laevis)
Go to UniProtKB:  P0DP34
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Disks large homolog 4
B
71Homo sapiensMutation(s): 0 
Gene 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