8TWY

Structure of PIK3CA with covalent inhibitor ALO26

• PDB DOI: https://doi.org/10.2210/pdb8TWY/pdb

• Classification: TRANSFERASE/Inhibitor
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2023-08-21 Released: 2024-08-28 
• Deposition Author(s): Burke, J.E., Barlow-Busch, I.
• Funding Organization(s): Canadian Institutes of Health Research (CIHR)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.67 Å
• R-Value Free: 0.261 
• R-Value Work: 0.225 
• R-Value Observed: 0.228 

Starting Model: experimental

Literature

Structure of PIK3CA with covalent inhibitor ALO26

Burke, J.E., Barlow-Busch, I.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 110.59 kDa 
• Atom Count: 6,619 
• Modelled Residue Count: 853 
• Deposited Residue Count: 945 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform	A	945	Homo sapiens	Mutation(s): 0  Gene Names: PIK3CA EC: 2.7.1.137 (UniProt), 2.7.11.1 (UniProt), 2.7.1.153 (UniProt)
UniProt & NIH Common Fund Data Resources
Find proteins for P42336 (Homo sapiens) Explore P42336  Go to UniProtKB:  P42336
PHAROS:  P42336 GTEx:  ENSG00000121879

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
RNX (Subject of Investigation/LOI)	B [auth A]	1-(4-{[2-(4-{(4P)-4-[2-amino-4-(difluoromethyl)pyrimidin-5-yl]-6-[(3S)-3-methylmorpholin-4-yl]-1,3,5-triazin-2-yl}piperazin-1-yl)-2-oxoethoxy]methyl}piperidin-1-yl)prop-2-en-1-one C28 H38 F2 N10 O4 PVVOFYPFCTWUAT-SFHVURJKSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.67 Å
• R-Value Free: 0.261 
• R-Value Work: 0.225 
• R-Value Observed: 0.228 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 59.13	α = 90
b = 135.41	β = 90
c = 143.71	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
Aimless	data scaling
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-08-28 
Deposition Author(s): Burke, J.E., Barlow-Busch, I.

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Funding Organization	Location	Grant Number
Canadian Institutes of Health Research (CIHR)	Canada	168998

Revision History  

• Version 1.0: 2024-08-28
  Type: Initial release
  
• Version 1.1: 2024-10-16
  Changes: Structure summary