ISDA

Entry Detail

PDB ID:

5EDS

Keywords:

Transferase/Transferase Inhibitor

Title:

Crystal structure of human PI3K-gamma in complex with benzimidazole inhibitor 5

Biological Source:

Source Organism:

Homo sapiens

Host Organism:

Spodoptera frugiperda

PDB Version:

Deposition Date:

2015-10-21

Release Date:

2015-12-30

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.80 Å

R-Value Free:

0.27

R-Value Work:

0.20

R-Value Observed:

0.21

Space Group:

C 1 2 1

Download Validation Report

Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Description:Phosphatidylinositol 4,5-bisphosphate 3-kinase catalytic subunit gamma isoform
Chain IDs:A
Chain Length:959
Number of Molecules:1
Biological Source:Homo sapiens

UniProt ID:P48736 Pfam ID:PF00794, PF00792, PF00613, PF00454 EC:2.7.1.137

Ligand Molecules

5MT

SO4

Primary Citation

Discovery, Optimization, and in Vivo Evaluation of Benzimidazole Derivatives AM-8508 and AM-9635 as Potent and Selective PI3K delta Inhibitors.

Shin, Y, Suchomel, J, Cardozo, M, Duquette, J, He, X, Henne, K, Hu, Y.L, Kelly, R.C, McCarter, J, McGee, L.R, Medina, J.C, Metz, D, San Miguel, T, Mohn, D, Tran, T, Vissinga, C, Wong, S, Wannberg, S, Whittington, D.A, Whoriskey, J, Yu, G, Zalameda, L, Zhang, X, Cushing, T.D.Show

J.Med.Chem. 59 431 447 (2016)

PMID: 26652588 DOI: 10.1021/acs.jmedchem.5b01651

Abstact

Lead optimization efforts resulted in the discovery of two potent, selective, and orally bioavailable PI3Kδ inhibitors, 1 (AM-8508) and 2 (AM-9635), with good pharmacokinetic properties. The compounds inhibit B cell receptor (BCR)-mediated AKT phosphorylation (pAKT) in PI3Kδ-dependent in vitro cell based assays. These compounds which share a benzimidazole bicycle are effective when administered in vivo at unbound concentrations consistent with their in vitro cell potency as a consequence of improved unbound drug concentration with lower unbound clearance. Furthermore, the compounds demonstrated efficacy in a Keyhole Limpet Hemocyanin (KLH) study in rats, where the blockade of PI3Kδ activity by inhibitors 1 and 2 led to effective inhibition of antigen-specific IgG and IgM formation after immunization with KLH.

Legend

Protein

Chemical

Disease

Primary Citation of related structures