ISDA

Entry Detail

PDB ID:

5ITD

Keywords:

Transferase/Protein Transport/Inhibitor

Title:

Crystal structure of PI3K alpha with PI3K delta inhibitor

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

unidentified baculovirus

PDB Version:

Deposition Date:

2016-03-16

Release Date:

2016-09-07

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

3.02 Å

R-Value Free:

0.24

R-Value Work:

0.20

R-Value Observed:

0.20

Space Group:

P 21 21 21

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit alpha isoform
Mutations:M232K, L233K
Chain IDs:A
Chain Length:1074
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P42336 Pfam ID:PF02192, PF00794, PF00792, PF00613, PF00454 EC:2.7.1.153

Protein Blast

Polymer Type:polypeptide(L)
Description:Phosphatidylinositol 3-kinase regulatory subunit alpha
Chain IDs:B
Chain Length:323
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P27986 Pfam ID:PF00017, PF16454 EC:2.7.1.153

Ligand Molecules

6CY

Primary Citation

Discovery and Pharmacological Characterization of Novel Quinazoline-Based PI3K Delta-Selective Inhibitors.

Hoegenauer, K, Soldermann, N, Stauffer, F, Furet, P, Graveleau, N, Smith, A.B, Hebach, C, Hollingworth, G.J, Lewis, I, Gutmann, S, Rummel, G, Knapp, M, Wolf, R.M, Blanz, J, Feifel, R, Burkhart, C, Zecri, F.Show

Acs Med.Chem.Lett. 7 762 767 (2016)

PMID: 27563400 DOI: 10.1021/acsmedchemlett.6b00119

Abstact

Inhibition of the lipid kinase PI3Kδ is a promising principle to treat B and T cell driven inflammatory diseases. Using a scaffold deconstruction-reconstruction strategy, we identified 4-aryl quinazolines that were optimized into potent PI3Kδ isoform selective analogues with good pharmacokinetic properties. With compound 11, we illustrate that biochemical PI3Kδ inhibition translates into modulation of isoform-dependent immune cell function (human, rat, and mouse). After oral administration of compound 11 to rats, proximal PD markers are inhibited, and dose-dependent efficacy in a mechanistic plaque forming cell assay could be demonstrated.

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Primary Citation of related structures