5M6U

HUMAN PI3KDELTA IN COMPLEX WITH LASW1579

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.257 

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This is version 1.1 of the entry. See complete history. 


Literature

Discovery of a Potent, Selective, and Orally Available PI3K delta Inhibitor for the Treatment of Inflammatory Diseases.

Erra, M., Taltavull, J., Greco, A., Bernal, F.J., Caturla, J.F., Gracia, J., Dominguez, M., Sabate, M., Paris, S., Soria, S., Hernandez, B., Armengol, C., Cabedo, J., Bravo, M., Calama, E., Miralpeix, M., Lehner, M.D.

(2017) ACS Med Chem Lett 8: 118-123

  • DOI: 10.1021/acsmedchemlett.6b00438
  • Primary Citation of Related Structures:  
    5M6U

  • PubMed Abstract: 

    • The delta isoform of the phosphatidylinositol 3-kinase (PI3Kδ) has been shown to have an essential role in specific immune cell functions and thus represents a potential therapeutic target for autoimmune and inflammatory diseases. Herein, the optimization of a series of pyrrolotriazinones as potent and selective PI3Kδ inhibitors is described ...

    The delta isoform of the phosphatidylinositol 3-kinase (PI3Kδ) has been shown to have an essential role in specific immune cell functions and thus represents a potential therapeutic target for autoimmune and inflammatory diseases. Herein, the optimization of a series of pyrrolotriazinones as potent and selective PI3Kδ inhibitors is described. The main challenge of the optimization process was to identify an orally available compound with a good pharmacokinetic profile in preclinical species that predicted a suitable dosing regimen in humans. Structure-activity relationships and structure-property relationships are discussed. This medicinal chemistry exercise led to the identification of LAS191954 as a candidate for clinical development.

    Organizational Affiliation: 

    Medicinal Chemistry and Screening, Pharmacokinetics and Metabolism, Systems Biology, and Respiratory Therapeutic Area, Almirall R&D , Barcelona 08980, Spain.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit delta isoformA1011Homo sapiensMutation(s): 0 
Gene Names: PIK3CD
EC: 2.7.1.153
UniProt & NIH Common Fund Data Resources
Find proteins for O00329 (Homo sapiens)
Explore O00329 
Go to UniProtKB:  O00329
PHAROS:  O00329
GTEx:  ENSG00000171608
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Phosphatidylinositol 3-kinase regulatory subunit alphaB724Homo sapiensMutation(s): 0 
Gene Names: PIK3R1, GRB1
UniProt & NIH Common Fund Data Resources
Find proteins for P27986 (Homo sapiens)
Explore P27986 
Go to UniProtKB:  P27986
PHAROS:  P27986
GTEx:  ENSG00000145675
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
7KA (Subject of Investigation/LOI)
Query on 7KA
Download Ideal Coordinates CCD File 
 C [auth A]4-azanyl-6-[[(1~{S})-1-(4-oxidanylidene-3-phenyl-pyrrolo[2,1-f][1,2,4]triazin-2-yl)ethyl]amino]pyrimidine-5-carbonitrile
C19 H16 N8 O
MDMKWYWCJZMADI-LBPRGKRZSA-N		 Ligand Interaction
Binding Affinity Annotations 
IDSourceBinding Affinity
7KA BindingDB:  5M6U IC50: min: 3.9, max: 1.20e+4 (nM) from 5 assay(s)
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.256 
  • R-Value Observed: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 92.493α = 90
b = 113.212β = 90
c = 144.321γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
PDB_EXTRACTdata extraction
XDSdata reduction
SCALAdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  


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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2017-02-01
    Type: Initial release
  • Version 1.1: 2019-03-06
    Changes: Data collection