3BXL | pdb_00003bxl

Crystal structure of the R-type calcium channeL (CaV2.3) IQ domain and CA2+calmodulin complex

• PDB DOI: https://doi.org/10.2210/pdb3BXL/pdb

• Classification: MEMBRANE PROTEIN, SIGNALING PROTEIN
• Organism(s): Rattus norvegicus, Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2008-01-14 Released: 2008-03-25 
• Deposition Author(s): Mori, M.X., Vander Kooi, C.W., Leahy, D.J., Yue, D.T.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free: 
  0.262 (Depositor), 0.262 (DCC) 
• R-Value Work: 
  0.205 (Depositor), 0.203 (DCC) 
• R-Value Observed: 
  0.208 (Depositor) 

Literature

Crystal structure of the CaV2 IQ domain in complex with Ca2+/calmodulin

Mori, M.X., Vander Kooi, C.W., Leahy, D.J., Yue, D.T.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 2 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 19.7 kDa 
• Atom Count: 1,443 
• Modeled Residue Count: 162 
• Deposited Residue Count: 169 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Calmodulin	A	148	Rattus norvegicus	Mutation(s): 0  Gene Names: Calm1, Calm, Cam, Cam1
UniProt
Find proteins for P0DP29 (Rattus norvegicus) Explore P0DP29  Go to UniProtKB:  P0DP29

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Voltage-dependent R-type calcium channel subunit alpha-1E peptide	B	21	N/A	Mutation(s): 0
UniProt & NIH Common Fund Data Resources
Find proteins for Q15878 (Homo sapiens) Explore Q15878  Go to UniProtKB:  Q15878
PHAROS:  Q15878 GTEx:  ENSG00000198216

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	G [auth A], H [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CA	C [auth A], D [auth A], E [auth A], F [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.30 Å
• R-Value Free:  0.262 (Depositor), 0.262 (DCC) 
• R-Value Work:  0.205 (Depositor), 0.203 (DCC) 
• R-Value Observed: 0.208 (Depositor) 

Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 124.606	α = 90
b = 124.606	β = 90
c = 74.024	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data collection
HKL-2000	data reduction
HKL-2000	data scaling
MOLREP	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-03-25 
Deposition Author(s): Mori, M.X., Vander Kooi, C.W., Leahy, D.J., Yue, D.T.

Revision History  

• Version 1.0: 2008-03-25
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references, Derived calculations