4aqr

X-ray diffraction
1.95Å resolution

Crystal structure of calmodulin in complex with the regulatory domain of a plasma-membrane Ca2+-ATPase

Released:

Function and Biology Details

Reaction catalysed:
ATP + H(2)O + Ca(2+)(Side 1) = ADP + phosphate + Ca(2+)(Side 2)
Biochemical function:
Biological process:
Cellular component:

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
PDBe Complex ID:
PDB-CPX-157781 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Calmodulin-7 Chains: A, B
Molecule details ›
Chains: A, B
Length: 149 amino acids
Theoretical weight: 16.86 KDa
Source organism: Arabidopsis thaliana
Expression system: Escherichia coli
UniProt:
  • Canonical: P59220 (Residues: 1-149; Coverage: 100%)
Gene names: At3g43810, CAM7, T28A8.100
Sequence domains: EF-hand domain pair
Calcium-transporting ATPase 8, plasma membrane-type Chain: D
Molecule details ›
Chain: D
Length: 57 amino acids
Theoretical weight: 6.92 KDa
Source organism: Arabidopsis thaliana
Expression system: Escherichia coli
UniProt:
  • Canonical: Q9LF79 (Residues: 40-95; Coverage: 5%)
Gene names: ACA8, At5g57110, MUL3.5
Sequence domains: Ca2+-ATPase N terminal autoinhibitory domain
Structure domains: Single alpha-helices involved in coiled-coils or other helix-helix interfaces

Ligands and Environments

1 bound ligand:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ESRF BEAMLINE ID23-2
Spacegroup: P41212
Unit cell:
a: 71.251Å b: 71.251Å c: 163.279Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.217 0.216 0.247
Expression system: Escherichia coli