5J7J

NMR Derived Structure of Ca2+ Calmodulin bound to Phosphorylated PSD-95


Experimental Data Snapshot

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

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Ca2+/calmodulin binding to PSD-95 mediates homeostatic synaptic scaling down.

Chowdhury, D.Turner, M.Patriarchi, T.Hergarden, A.C.Anderson, D.Zhang, Y.Sun, J.Chen, C.Y.Ames, J.B.Hell, J.W.

(2018) EMBO J 37: 122-138

  • DOI: 10.15252/embj.201695829
  • Primary Citation of Related Structures:  
    5J7J

  • PubMed Abstract: 
  • Postsynaptic density protein-95 (PSD-95) localizes AMPA-type glutamate receptors (AMPARs) to postsynaptic sites of glutamatergic synapses. Its postsynaptic displacement is necessary for loss of AMPARs during homeostatic scaling down of synapses. Here, we demonstrate that upon Ca 2+ influx, Ca 2+ /calmodulin (Ca 2+ /CaM) binding to the N-terminus of PSD-95 mediates postsynaptic loss of PSD-95 and AMPARs during homeostatic scaling down ...

    Postsynaptic density protein-95 (PSD-95) localizes AMPA-type glutamate receptors (AMPARs) to postsynaptic sites of glutamatergic synapses. Its postsynaptic displacement is necessary for loss of AMPARs during homeostatic scaling down of synapses. Here, we demonstrate that upon Ca 2+ influx, Ca 2+ /calmodulin (Ca 2+ /CaM) binding to the N-terminus of PSD-95 mediates postsynaptic loss of PSD-95 and AMPARs during homeostatic scaling down. Our NMR structural analysis identified E17 within the PSD-95 N-terminus as important for binding to Ca 2+ /CaM by interacting with R126 on CaM. Mutating E17 to R prevented homeostatic scaling down in primary hippocampal neurons, which is rescued via charge inversion by ectopic expression of CaM R 126E , as determined by analysis of miniature excitatory postsynaptic currents. Accordingly, increased binding of Ca 2+ /CaM to PSD-95 induced by a chronic increase in Ca 2+ influx is a critical molecular event in homeostatic downscaling of glutamatergic synaptic transmission.


    Organizational Affiliation

    Department of Pharmacology, University of California, Davis, CA, USA jbames@ucdavis.edu jwhell@ucdavis.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
CalmodulinA148Xenopus laevisMutation(s): 0 
Gene Names: calm1calm2
UniProt
Find proteins for P0DP33 (Xenopus laevis)
Explore P0DP33 
Go to UniProtKB:  P0DP33
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Disks large homolog 4B19Homo sapiensMutation(s): 0 
Gene Names: DLG4PSD95
UniProt & NIH Common Fund Data Resources
Find proteins for P78352 (Homo sapiens)
Explore P78352 
Go to UniProtKB:  P78352
PHAROS:  P78352
Protein Feature View
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  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
TPO
Query on TPO
BL-PEPTIDE LINKINGC4 H10 N O6 PTHR
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 200 
  • Conformers Submitted: 
  • Selection Criteria: structures with the lowest energy 
  • OLDERADO: 5J7J Olderado

Structure Validation

View Full Validation Report



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of Mental Health (NIH/NIMH)United StatesMH097887
National Institutes of Health/National Eye Institute (NIH/NEI)United StatesEY012347

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-25
    Type: Initial release
  • Version 1.1: 2019-05-08
    Changes: Data collection, Database references
  • Version 1.2: 2019-11-27
    Changes: Author supporting evidence, Data collection