4upu

X-ray diffraction
2.34Å resolution

Crystal structure of IP3 3-K calmodulin binding region in complex with Calmodulin

Released:

Function and Biology Details

Reaction catalysed:
ATP + 1D-myo-inositol 1,4,5-trisphosphate = ADP + 1D-myo-inositol 1,3,4,5-tetrakisphosphate

Structure analysis Details

Assembly composition:
hetero 48-mer (preferred)
PDBe Complex ID:
PDB-CPX-143978 (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Calmodulin-1 Chain: A
Molecule details ›
Chain: A
Length: 148 amino acids
Theoretical weight: 16.72 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P0DP23 (Residues: 2-149; Coverage: 99%)
Gene names: CALM, CALM1, CAM, CAM1
Sequence domains: EF-hand domain pair
Inositol-trisphosphate 3-kinase A Chain: B
Molecule details ›
Chain: B
Length: 26 amino acids
Theoretical weight: 3.03 KDa
Source organism: Homo sapiens
Expression system: Escherichia coli BL21(DE3)
UniProt:
  • Canonical: P23677 (Residues: 158-183; Coverage: 6%)
Gene name: ITPKA

Ligands and Environments

2 bound ligands:
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALBA BEAMLINE XALOC
Spacegroup: I432
Unit cell:
a: 159.48Å b: 159.48Å c: 159.48Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.189 0.188 0.21
Expression system: Escherichia coli BL21(DE3)