2RD0

Structure of a human p110alpha/p85alpha complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.263 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

The structure of a human p110alpha/p85alpha complex elucidates the effects of oncogenic PI3Kalpha mutations.

Huang, C.H.Mandelker, D.Schmidt-Kittler, O.Samuels, Y.Velculescu, V.E.Kinzler, K.W.Vogelstein, B.Gabelli, S.B.Amzel, L.M.

(2007) Science 318: 1744-1748

  • DOI: 10.1126/science.1150799

  • PubMed Abstract: 
  • PIK3CA, one of the two most frequently mutated oncogenes in human tumors, codes for p110alpha, the catalytic subunit of a phosphatidylinositol 3-kinase, isoform alpha (PI3Kalpha, p110alpha/p85). Here, we report a 3.0 angstrom resolution structure of ...

    PIK3CA, one of the two most frequently mutated oncogenes in human tumors, codes for p110alpha, the catalytic subunit of a phosphatidylinositol 3-kinase, isoform alpha (PI3Kalpha, p110alpha/p85). Here, we report a 3.0 angstrom resolution structure of a complex between p110alpha and a polypeptide containing the p110alpha-binding domains of p85alpha, a protein required for its enzymatic activity. The structure shows that many of the mutations occur at residues lying at the interfaces between p110alpha and p85alpha or between the kinase domain of p110alpha and other domains within the catalytic subunit. Disruptions of these interactions are likely to affect the regulation of kinase activity by p85 or the catalytic activity of the enzyme, respectively. In addition to providing new insights about the structure of PI3Kalpha, these results suggest specific mechanisms for the effect of oncogenic mutations in p110alpha and p85alpha.


    Organizational Affiliation

    Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol-4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
A
1096Homo sapiensGene Names: PIK3CA
EC: 2.7.11.1, 2.7.1.153
Find proteins for P42336 (Homo sapiens)
Go to Gene View: PIK3CA
Go to UniProtKB:  P42336
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Phosphatidylinositol 3-kinase regulatory subunit alpha
B
279Homo sapiensGene Names: PIK3R1 (GRB1)
Find proteins for P27986 (Homo sapiens)
Go to Gene View: PIK3R1
Go to UniProtKB:  P27986
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.05 Å
  • R-Value Free: 0.323 
  • R-Value Work: 0.263 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 115.058α = 90.00
b = 117.050β = 90.00
c = 151.584γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACrefinement
AMoREphasing
HKL-2000data scaling
PDB_EXTRACTdata extraction
ADSCdata collection

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2007-12-25
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Advisory, Version format compliance