2REA

Crystal structures of C2ALPHA-PI3 kinase PX-domain domain indicate conformational change associated with ligand binding.

• PDB DOI: https://doi.org/10.2210/pdb2REA/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-09-26 Released: 2007-11-27 
• Deposition Author(s): Parkinson, G.N., Vines, D., Driscoll, P.C., Djordjevic, S.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.318 
• R-Value Work: 0.231 
• R-Value Observed: 0.235 

Literature

Crystal structures of PI3K-C2alpha PX domain indicate conformational change associated with ligand binding

Parkinson, G.N., Vines, D., Driscoll, P.C., Djordjevic, S.

(2008) BMC Struct Biol 8: 13-13

• PubMed: 18312637 
• DOI: https://doi.org/10.1186/1472-6807-8-13
• Primary Citation of Related Structures:  
  2REA, 2RED


• PubMed Abstract: 
  

  PX domains have specialized protein structures involved in binding of phosphoinositides (PIs). Through binding to the various PIs PX domains provide site-specific membrane signals to modulate the intracellular localisation and biological activity of effector proteins. Several crystal structures of these domains are now available from a variety of proteins. All PX domains contain a canonical core structure with main differences exhibited within the loop regions forming the phosphoinositide binding pockets. It is within these areas that the molecular basis for ligand specificity originates.

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Organizational Affiliation: 

Cancer Research UK Biomolecular Structure Group, The School of Pharmacy, University of London, 29-39 Brunswick Square, London WC1N 1AX, UK. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Macromolecule Content

• Total Structure Weight: 14.38 kDa 
• Atom Count: 964 
• Modelled Residue Count: 116 
• Deposited Residue Count: 121 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol-4-phosphate 3-kinase C2 domain-containing alpha polypeptide	A	121	Homo sapiens	Mutation(s): 0  Gene Names: PIK3C2A EC: 2.7.1.154
UniProt & NIH Common Fund Data Resources
Find proteins for O00443 (Homo sapiens) Explore O00443  Go to UniProtKB:  O00443
PHAROS:  O00443 GTEx:  ENSG00000011405

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.50 Å
• R-Value Free: 0.318 
• R-Value Work: 0.231 
• R-Value Observed: 0.235 
• Space Group: P 3₁ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.866	α = 90
b = 56.866	β = 90
c = 92.995	γ = 120

Software Package:

Software Name	Purpose
EPMR	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-11-27 
Deposition Author(s): Parkinson, G.N., Vines, D., Driscoll, P.C., Djordjevic, S.

Revision History  

• Version 1.0: 2007-11-27
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-08-30
  Changes: Data collection, Database references, Refinement description