6Q6Y

PI3K delta in complex with N(2chloro5phenylpyridin3yl)benzenesulfonamide

• PDB DOI: https://doi.org/10.2210/pdb6Q6Y/pdb

• Classification: TRANSFERASE
• Organism(s): Mus musculus
• Expression System: Spodoptera frugiperda
• Mutation(s): No 


• Deposited: 2018-12-12 Released: 2018-12-26 
• Deposition Author(s): Convery, M.A., Rowland, P., Down, K., Barton, N.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.03 Å
• R-Value Free: 0.209 
• R-Value Work: 0.174 
• R-Value Observed: 0.175 

Literature

Discovery of Potent, Efficient, and Selective Inhibitors of Phosphoinositide 3-Kinase delta through a Deconstruction and Regrowth Approach.

Barton, N., Convery, M., Cooper, A.W.J., Down, K., Hamblin, J.N., Inglis, G., Peace, S., Rowedder, J., Rowland, P., Taylor, J.A., Wellaway, N.

(2018) J Med Chem 61: 11061-11073

• PubMed: 30532965 
• DOI: https://doi.org/10.1021/acs.jmedchem.8b01556
• Primary Citation of Related Structures:  
  6Q6Y, 6Q73, 6Q74


• PubMed Abstract: 
  

  A deconstruction of previously reported phosphoinositide 3-kinase δ (PI3Kδ) inhibitors and subsequent regrowth led to the identification of a privileged fragment for PI3Kδ, which was exploited to deliver a potent, efficient, and selective lead series with a novel binding mode observed in the PI3Kδ crystal structure.

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Organizational Affiliation: 

GlaxoSmithKline R&D, Medicines Research Centre , Gunnels Wood Road , SG1 2NY Stevenage , U.K.

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: 108.17 kDa 
• Atom Count: 7,387 
• Modelled Residue Count: 862 
• Deposited Residue Count: 940 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoform	A	940	Mus musculus	Mutation(s): 0  Gene Names: Pik3cd EC: 2.7.1.153 (PDB Primary Data), 2.7.1.137 (UniProt)
UniProt
Find proteins for O35904 (Mus musculus) Explore O35904  Go to UniProtKB:  O35904

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HKQ (Subject of Investigation/LOI)	B [auth A]	~{N}-(2-chloranyl-5-phenyl-pyridin-3-yl)benzenesulfonamide C17 H13 Cl N2 O2 S BKSZOJANUXVKCU-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.03 Å
• R-Value Free: 0.209 
• R-Value Work: 0.174 
• R-Value Observed: 0.175 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 141.69	α = 90
b = 64.21	β = 102.62
c = 116.37	γ = 90

Software Package:

Software Name	Purpose
BUSTER	refinement
XDS	data reduction
autoPROC	data scaling
BUSTER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2018-12-26 
Deposition Author(s): Convery, M.A., Rowland, P., Down, K., Barton, N.

Revision History  

• Version 1.0: 2018-12-26
  Type: Initial release
  
• Version 1.1: 2019-04-24
  Changes: Data collection, Database references
• Version 1.2: 2021-09-29
  Changes: Database references, Refinement description, Source and taxonomy
• Version 1.3: 2024-06-19
  Changes: Data collection