PDBe 4jps

X-ray diffraction
2.2Å resolution

Co-crystal Structures of the Lipid Kinase PI3K alpha with Pan and Isoform Selective Inhibitors


Function and Biology Details

Structure analysis Details

Assembly composition:
hetero dimer (preferred)
Entry contents:
2 distinct polypeptide molecules
Macromolecules (2 distinct):
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform Chain: A
Phosphatidylinositol 3-kinase regulatory subunit alpha Chain: B
Molecule details ›
Chain: B
Length: 293 amino acids
Theoretical weight: 35.14 KDa
Source organism: Homo sapiens
Expression system: Spodoptera frugiperda
  • Canonical: NEW P27986 (Residues: 307-593; Coverage: 40%)
Gene names: GRB1, PIK3R1
Sequence domains: SH2 domain

Ligands and Environments

2 bound ligands:

No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: ALS BEAMLINE 5.0.2
Spacegroup: P212121
Unit cell:
a: 104.865Å b: 106.195Å c: 133.667Å
α: 90° β: 90° γ: 90°
R R work R free
0.206 0.205 0.228
Expression system: Spodoptera frugiperda