7M7D

Crystal structure of the indoleamine 2,3-dioxygenagse 1 (IDO1) complexed with IACS-8968

Summary for 7M7D

• Entry DOI: 10.2210/pdb7m7d/pdb
• Related: 7M63
• Descriptor: Indoleamine 2,3-dioxygenase 1, (5S)-6,6-dimethyl-8-[(4S)-7-(trifluoromethyl)imidazo[1,5-a]pyridin-5-yl]-1,3,8-triazaspiro[4.5]decane-2,4-dione, PROTOPORPHYRIN IX CONTAINING FE, ... (4 entities in total)
• Functional Keywords: ido1, inhibitor, enzyme, complex, hydrolase, hydrolase-hydrolase inhibitor complex, hydrolase/hydrolase inhibitor
• Biological source: Homo sapiens (Human)
• Total number of polymer chains: 2
• Total formula weight: 94586.19

Authors

Leonard, P.G.,Cross, J.B. (deposition date: 2021-03-27, release date: 2021-09-01, Last modification date: 2024-10-30)

Primary citation

Hamilton, M.M.,Mseeh, F.,McAfoos, T.J.,Leonard, P.G.,Reyna, N.J.,Harris, A.L.,Xu, A.,Han, M.,Soth, M.J.,Czako, B.,Theroff, J.P.,Mandal, P.K.,Burke, J.P.,Virgin-Downey, B.,Petrocchi, A.,Pfaffinger, D.,Rogers, N.E.,Parker, C.A.,Yu, S.S.,Jiang, Y.,Krapp, S.,Lammens, A.,Trevitt, G.,Tremblay, M.R.,Mikule, K.,Wilcoxen, K.,Cross, J.B.,Jones, P.,Marszalek, J.R.,Lewis, R.T.
Discovery of IACS-9779 and IACS-70465 as Potent Inhibitors Targeting Indoleamine 2,3-Dioxygenase 1 (IDO1) Apoenzyme.
J.Med.Chem., 64:11302-11329, 2021

PubMed Abstract: Indoleamine 2,3-dioxygenase 1 (IDO1), a heme-containing enzyme that mediates the rate-limiting step in the metabolism of l-tryptophan to kynurenine, has been widely explored as a potential immunotherapeutic target in oncology. We developed a class of inhibitors with a conformationally constrained bicyclo[3.1.0]hexane core. These potently inhibited IDO1 in a cellular context by binding to the apoenzyme, as elucidated by biochemical characterization and X-ray crystallography. A SKOV3 tumor model was instrumental in differentiating compounds, leading to the identification of IACS-9779 () and IACS-70465 (). IACS-70465 has excellent cellular potency, a robust pharmacodynamic response, and in a human whole blood assay was more potent than linrodostat (BMS-986205). IACS-9779 with a predicted human efficacious once daily dose below 1 mg/kg to sustain >90% inhibition of IDO1 displayed an acceptable safety margin in rodent toxicology and dog cardiovascular studies to support advancement into preclinical safety evaluation for human development.

PubMed: 34292726
DOI: 10.1021/acs.jmedchem.1c00679

Experimental method

X-RAY DIFFRACTION (2.6 Å)