2HQW

Crystal Structure of Ca2+/Calmodulin bound to NMDA Receptor NR1C1 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The NMDA Receptor NR1 C1 Region Bound to Calmodulin: Structural Insights into Functional Differences between Homologous Domains.

Ataman, Z.A.Gakhar, L.Sorensen, B.R.Hell, J.W.Shea, M.A.

(2007) Structure 15: 1603-1617

  • DOI: 10.1016/j.str.2007.10.012

  • PubMed Abstract: 
  • Calmodulin (CaM) regulates tetrameric N-methyl-D-aspartate receptors (NMDARs) by binding tightly to the C0 and C1 regions of its NR1 subunit. A crystal structure (2HQW; 1.96 A) of calcium-saturated CaM bound to NR1C1 (peptide spanning 875-898) showed ...

    Calmodulin (CaM) regulates tetrameric N-methyl-D-aspartate receptors (NMDARs) by binding tightly to the C0 and C1 regions of its NR1 subunit. A crystal structure (2HQW; 1.96 A) of calcium-saturated CaM bound to NR1C1 (peptide spanning 875-898) showed that NR1 S890, whose phosphorylation regulates membrane localization, was solvent protected, whereas the endoplasmic reticulum retention motif was solvent exposed. NR1 F880 filled the CaM C-domain pocket, whereas T886 was closest to the N-domain pocket. This 1-7 pattern was most similar to that in the CaM-MARCKS complex. Comparison of CaM-ligand wrap-around conformations identified a core tetrad of CaM C-domain residues (FLMM(C)) that contacted all ligands consistently. An identical tetrad of N-domain residues (FLMM(N)) made variable sets of contacts with ligands. This CaM-NR1C1 structure provides a foundation for designing mutants to test the role of CaM in NR1 trafficking as well as insights into how the homologous CaM domains have different roles in molecular recognition.


    Organizational Affiliation

    Department of Biochemistry, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, Iowa City, IA 52242-1109, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Calmodulin
A
148Rattus norvegicusMutation(s): 0 
Gene Names: Calm1 (Calm, Cam, Cam1, CaMI)
Find proteins for P0DP29 (Rattus norvegicus)
Go to UniProtKB:  P0DP29
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Glutamate NMDA receptor subunit zeta 1
B
24Homo sapiensMutation(s): 0 
Gene Names: GRIN1 (NMDAR1)
Find proteins for Q05586 (Homo sapiens)
Go to Gene View: GRIN1
Go to UniProtKB:  Q05586
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: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.206 
  • Space Group: P 32 2 1
Unit Cell:
Length (Å)Angle (°)
a = 40.371α = 90.00
b = 40.371β = 90.00
c = 175.765γ = 120.00
Software Package:
Software NamePurpose
AMoREphasing
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-11-13
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Derived calculations, Version format compliance