1
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Chan BK, Seward E, Lainchbury M, Brewer TF, An L, Blench T, Cartwright MW, Chan GKY, Choo EF, Drummond J, Elliott RL, Gancia E, Gazzard L, Hu B, Jones GE, Luo X, Madin A, Malhotra S, Moffat JG, Pang J, Salphati L, Sneeringer CJ, Stivala CE, Wei B, Wang W, Wu P, Heffron TP. Discovery of Spiro-azaindoline Inhibitors of Hematopoietic Progenitor Kinase 1 (HPK1). ACS Med Chem Lett 2021; 13:84-91. [PMID: 35059127 PMCID: PMC8762754 DOI: 10.1021/acsmedchemlett.1c00473] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Accepted: 12/01/2021] [Indexed: 01/16/2023] Open
Abstract
Hematopoietic progenitor kinase 1 (HPK1) is implicated as a negative regulator of T-cell receptor-induced T-cell activation. Studies using HPK1 kinase-dead knock-in animals have demonstrated the loss of HPK1 kinase activity resulted in an increase in T-cell function and tumor growth inhibition in glioma models. Herein, we describe the discovery of a series of small molecule inhibitors of HPK1. Using a structure-based drug design approach, the kinase selectivity of the molecules was significantly improved by inducing and stabilizing an unusual P-loop folded binding mode. The metabolic liabilities of the initial 7-azaindole high-throughput screening hit were mitigated by addressing a key metabolic soft spot along with physicochemical property-based optimization. The resulting spiro-azaindoline HPK1 inhibitors demonstrated improved in vitro ADME properties and the ability to induce cytokine production in primary human T-cells.
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Affiliation(s)
- Bryan K. Chan
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States,
| | - Eileen Seward
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Michael Lainchbury
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Thomas F. Brewer
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Le An
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Toby Blench
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Matthew W. Cartwright
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Grace Ka Yan Chan
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Edna F. Choo
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jason Drummond
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Richard L. Elliott
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Emanuela Gancia
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Lewis Gazzard
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Baihua Hu
- Pharmaron
Beijing Co, No. 6 Tai He Road, BDA, Beijing 100176, P.R. China
| | - Graham E. Jones
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Xifeng Luo
- Pharmaron
Beijing Co, No. 6 Tai He Road, BDA, Beijing 100176, P.R. China
| | - Andrew Madin
- Charles
River Laboratories, 8-9
Spire Green, Flex Meadow, Harlow, Essex CM19 5TR, United Kingdom
| | - Sushant Malhotra
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - John G. Moffat
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jodie Pang
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Laurent Salphati
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | | | - Craig E. Stivala
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Binqing Wei
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Weiru Wang
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Ping Wu
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Timothy P. Heffron
- Genentech
Inc., 1 DNA Way, South San Francisco, California 94080, United States
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2
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Hu DX, Patel S, Chen H, Wang S, Staben ST, Dimitrova YN, Wallweber HA, Lee JY, Chan GKY, Sneeringer CJ, Prangley MS, Moffat JG, Wu KC, Schutt LK, Salphati L, Pang J, McNamara E, Huang H, Chen Y, Wang Y, Zhao W, Lim J, Murthy A, Siu M. Structure-Based Design of Potent, Selective, and Orally Bioavailable VPS34 Kinase Inhibitors. J Med Chem 2021; 65:11500-11512. [PMID: 34779204 DOI: 10.1021/acs.jmedchem.1c01180] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
VPS34 is a class III phosphoinositide 3-kinase involved in endosomal trafficking and autophagosome formation. Inhibitors of VPS34 were believed to have value as anticancer agents, but genetic and pharmacological data suggest that sustained inhibition of VPS34 kinase activity may not be well tolerated. Here we disclose the identification of a novel series of dihydropyrazolopyrazinone compounds represented by compound 5 as potent, selective, and orally bioavailable VPS34 inhibitors through a structure-based design strategy. A water-interacting hydrogen bond acceptor within an appropriate distance to a hinge-binding element was found to afford significant VPS34 potency across chemical scaffolds. The selectivity of compound 5 over PIK family kinases arises from interactions between the hinge-binding element and the pseudo-gatekeeper residue Met682. As recent in vivo pharmacology data suggests that sustained inhibition of VPS34 kinase activity may not be tolerated, structure-activity relationships leading to VPS34 inhibition may be helpful for avoiding this target in other ATP-competitive kinase programs.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Yong Chen
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, China
| | - Yunli Wang
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, China
| | - Wensheng Zhao
- Pharmaron Beijing Co., Ltd., 6 Taihe Road, BDA, Beijing 100176, China
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3
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Huestis MP, Durk MR, Eigenbrot C, Gibbons P, Hunsaker TL, La H, Leung DH, Liu W, Malek S, Merchant M, Moffat JG, Muli CS, Orr CJ, Parr BT, Shanahan F, Sneeringer CJ, Wang W, Yen I, Yin J, Rudolph J, Siu M. Targeting KRAS Mutant Cancers via Combination Treatment: Discovery of a Pyridopyridazinone pan-RAF Kinase Inhibitor. ACS Med Chem Lett 2021; 12:791-797. [PMID: 34055227 DOI: 10.1021/acsmedchemlett.1c00063] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 03/31/2021] [Indexed: 02/06/2023] Open
Abstract
Structure-based optimization of a set of aryl urea RAF inhibitors has led to the identification of Type II pan-RAF inhibitor GNE-9815 (7), which features a unique pyrido[2,3-d]pyridazin-8(7H)-one hinge-binding motif. With minimal polar hinge contacts, the pyridopyridazinone hinge binder moiety affords exquisite kinase selectivity in a lipophilic efficient manner. The improved physicochemical properties of GNE-9815 provided a path for oral dosing without enabling formulations. In vivo evaluation of GNE-9815 in combination with the MEK inhibitor cobimetinib demonstrated synergistic MAPK pathway modulation in an HCT116 xenograft mouse model. To the best of our knowledge, GNE-9815 is among the most highly kinase-selective RAF inhibitors reported to date.
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Affiliation(s)
- Malcolm P. Huestis
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Matthew R. Durk
- Drug Metabolism and Pharmacokinetics, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Charles Eigenbrot
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Paul Gibbons
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Thomas L. Hunsaker
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Hank La
- Drug Metabolism and Pharmacokinetics, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Dennis H. Leung
- Small Molecule Pharmaceutical Sciences, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Wendy Liu
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Shiva Malek
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Mark Merchant
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - John G. Moffat
- Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christine S. Muli
- Small Molecule Pharmaceutical Sciences, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christine J. Orr
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Brendan T. Parr
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Frances Shanahan
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christopher J. Sneeringer
- Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Weiru Wang
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Ivana Yen
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jianping Yin
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Joachim Rudolph
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Michael Siu
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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4
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Huestis MP, Dela Cruz D, DiPasquale AG, Durk MR, Eigenbrot C, Gibbons P, Gobbi A, Hunsaker TL, La H, Leung DH, Liu W, Malek S, Merchant M, Moffat JG, Muli CS, Orr CJ, Parr BT, Shanahan F, Sneeringer CJ, Wang W, Yen I, Yin J, Siu M, Rudolph J. Targeting KRAS Mutant Cancers via Combination Treatment: Discovery of a 5-Fluoro-4-(3 H)-quinazolinone Aryl Urea pan-RAF Kinase Inhibitor. J Med Chem 2021; 64:3940-3955. [PMID: 33780623 DOI: 10.1021/acs.jmedchem.0c02085] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Optimization of a series of aryl urea RAF inhibitors led to the identification of type II pan-RAF inhibitor GNE-0749 (7), which features a fluoroquinazolinone hinge-binding motif. By minimizing reliance on common polar hinge contacts, this hinge binder allows for a greater contribution of RAF-specific residue interactions, resulting in exquisite kinase selectivity. Strategic substitution of fluorine at the C5 position efficiently masked the adjacent polar NH functionality and increased solubility by impeding a solid-state conformation associated with stronger crystal packing of the molecule. The resulting improvements in permeability and solubility enabled oral dosing of 7. In vivo evaluation of 7 in combination with the MEK inhibitor cobimetinib demonstrated synergistic pathway inhibition and significant tumor growth inhibition in a KRAS mutant xenograft mouse model.
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Affiliation(s)
- Malcolm P Huestis
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Darlene Dela Cruz
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Antonio G DiPasquale
- Small Molecule Pharmaceutical Sciences, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Matthew R Durk
- Drug Metabolism and Pharmacokinetics, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Charles Eigenbrot
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Paul Gibbons
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Alberto Gobbi
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Thomas L Hunsaker
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Hank La
- Drug Metabolism and Pharmacokinetics, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Dennis H Leung
- Small Molecule Pharmaceutical Sciences, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Wendy Liu
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Shiva Malek
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Mark Merchant
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - John G Moffat
- Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christine S Muli
- Small Molecule Pharmaceutical Sciences, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christine J Orr
- Translational Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Brendan T Parr
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Frances Shanahan
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Christopher J Sneeringer
- Biochemical and Cellular Pharmacology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Weiru Wang
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Ivana Yen
- Molecular Oncology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Jianping Yin
- Structural Biology, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Michael Siu
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
| | - Joachim Rudolph
- Discovery Chemistry, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, United States
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5
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Bronner SM, Merrick KA, Murray J, Salphati L, Moffat JG, Pang J, Sneeringer CJ, Dompe N, Cyr P, Purkey H, Boenig GDL, Li J, Kolesnikov A, Larouche-Gauthier R, Lai KW, Shen X, Aubert-Nicol S, Chen YC, Cheong J, Crawford JJ, Hafner M, Haghshenas P, Jakalian A, Leclerc JP, Lim NK, O'Brien T, Plise EG, Shalan H, Sturino C, Wai J, Xiao Y, Yin J, Zhao L, Gould S, Olivero A, Heffron TP. Design of a brain-penetrant CDK4/6 inhibitor for glioblastoma. Bioorg Med Chem Lett 2019; 29:2294-2301. [PMID: 31307887 DOI: 10.1016/j.bmcl.2019.06.021] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Revised: 06/10/2019] [Accepted: 06/17/2019] [Indexed: 12/21/2022]
Abstract
CDK4 and CDK6 are kinases with similar sequences that regulate cell cycle progression and are validated targets in the treatment of cancer. Glioblastoma is characterized by a high frequency of CDKN2A/CCND2/CDK4/CDK6 pathway dysregulation, making dual inhibition of CDK4 and CDK6 an attractive therapeutic approach for this disease. Abemaciclib, ribociclib, and palbociclib are approved CDK4/6 inhibitors for the treatment of HR+/HER2- breast cancer, but these drugs are not expected to show strong activity in brain tumors due to poor blood brain barrier penetration. Herein, we report the identification of a brain-penetrant CDK4/6 inhibitor derived from a literature molecule with low molecular weight and topological polar surface area (MW = 285 and TPSA = 66 Å2), but lacking the CDK2/1 selectivity profile due to the absence of a basic amine. Removal of a hydrogen bond donor via cyclization of the pyrazole allowed for the introduction of basic and semi-basic amines, while maintaining in many cases efflux ratios reasonable for a CNS program. Ultimately, a basic spiroazetidine (cpKa = 8.8) was identified that afforded acceptable selectivity over anti-target CDK1 while maintaining brain-penetration in vivo (mouse Kp,uu = 0.20-0.59). To probe the potency and selectivity, our lead compound was evaluated in a panel of glioblastoma cell lines. Potency comparable to abemaciclib was observed in Rb-wild type lines U87MG, DBTRG-05MG, A172, and T98G, while Rb-deficient cell lines SF539 and M059J exhibited a lack of sensitivity.
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Affiliation(s)
- Sarah M Bronner
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States.
| | - Karl A Merrick
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Jeremy Murray
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Laurent Salphati
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - John G Moffat
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Jodie Pang
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | | | - Nicholas Dompe
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Patrick Cyr
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Hans Purkey
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | | | - Jun Li
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | | | | | - Kwong Wah Lai
- WuXi AppTec Co., Ltd., 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People's Republic of China
| | - Xiaoli Shen
- WuXi AppTec Co., Ltd., 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People's Republic of China
| | | | - Yi-Chen Chen
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Jonathan Cheong
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - James J Crawford
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Marc Hafner
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Pouyan Haghshenas
- Paraza Pharma, Inc., 2525 Ave. Marie-Curie, Montreal, QC H4S 2E1, Canada
| | - Araz Jakalian
- Paraza Pharma, Inc., 2525 Ave. Marie-Curie, Montreal, QC H4S 2E1, Canada
| | | | - Ngiap-Kie Lim
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Tom O'Brien
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Emile G Plise
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Hadil Shalan
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Claudio Sturino
- Paraza Pharma, Inc., 2525 Ave. Marie-Curie, Montreal, QC H4S 2E1, Canada
| | - John Wai
- WuXi AppTec Co., Ltd., 288 Fute Zhong Road, Waigaoqiao Free Trade Zone, Shanghai 200131, People's Republic of China
| | - Yang Xiao
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Jianping Yin
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Liang Zhao
- Paraza Pharma, Inc., 2525 Ave. Marie-Curie, Montreal, QC H4S 2E1, Canada
| | - Stephen Gould
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Alan Olivero
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States
| | - Timothy P Heffron
- Genentech, Inc., 1 DNA Way, South San Francisco, CA 94080, United States.
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6
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Wu P, Sneeringer CJ, Pitts KE, Day ES, Chan BK, Wei B, Lehoux I, Mortara K, Li H, Wu J, Franke Y, Moffat JG, Grogan JL, Heffron TP, Wang W. Hematopoietic Progenitor Kinase-1 Structure in a Domain-Swapped Dimer. Structure 2018; 27:125-133.e4. [PMID: 30503777 DOI: 10.1016/j.str.2018.10.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Revised: 07/27/2018] [Accepted: 10/25/2018] [Indexed: 12/12/2022]
Abstract
Enhancement of antigen-specific T cell immunity has shown significant therapeutic benefit in infectious diseases and cancer. Hematopoietic progenitor kinase-1 (HPK1) is a negative-feedback regulator of T cell receptor signaling, which dampens T cell proliferation and effector function. A recent report showed that a catalytic dead mutant of HPK1 phenocopies augmented T cell responses observed in HPK1-knockout mice, indicating that kinase activity is critical for function. We evaluated active and inactive mutants and determined crystal structures of HPK1 kinase domain (HPK1-KD) in apo and ligand bound forms. In all structures HPK1-KD displays a rare domain-swapped dimer, in which the activation segment comprises a well-conserved dimer interface. Biophysical measurements show formation of dimer in solution. The activation segment adopts an α-helical structure which exhibits distinct orientations in active and inactive states. This face-to-face configuration suggests that the domain-swapped dimer may possess alternative selectivity for certain substrates of HPK1 under relevant cellular context.
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Affiliation(s)
- Ping Wu
- Department of Structural Biology, Genentech, South San Francisco, CA 94080, USA
| | | | - Keith E Pitts
- Department of Biochemical Pharmacology, Genentech, South San Francisco, CA 94080, USA
| | - Eric S Day
- Department of Late Stage Pharmaceutical Development, Genentech, South San Francisco, CA 94080, USA
| | - Bryan K Chan
- Department of Discovery Chemistry, Genentech, South San Francisco, CA 94080, USA
| | - Binqing Wei
- Department of Discovery Chemistry, Genentech, South San Francisco, CA 94080, USA
| | - Isabelle Lehoux
- Department of Biomolecular Resources, Genentech, South San Francisco, CA 94080, USA
| | - Kyle Mortara
- Department of Biomolecular Resources, Genentech, South San Francisco, CA 94080, USA
| | - Hong Li
- Department of Protein Chemistry, Genentech, South San Francisco, CA 94080, USA
| | - Jiansheng Wu
- Department of Protein Chemistry, Genentech, South San Francisco, CA 94080, USA
| | - Yvonne Franke
- Department of Biomolecular Resources, Genentech, South San Francisco, CA 94080, USA
| | - John G Moffat
- Department of Biochemical Pharmacology, Genentech, South San Francisco, CA 94080, USA
| | - Jane L Grogan
- Department of Cancer Immunology, Genentech, South San Francisco, CA 94080, USA
| | - Timothy P Heffron
- Department of Discovery Chemistry, Genentech, South San Francisco, CA 94080, USA
| | - Weiru Wang
- Department of Structural Biology, Genentech, South San Francisco, CA 94080, USA.
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7
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Knutson SK, Wigle TJ, Warholic NM, Sneeringer CJ, Allain CJ, Klaus CR, Sacks JD, Raimondi A, Majer CR, Song J, Scott MP, Jin L, Smith JJ, Olhava EJ, Chesworth R, Moyer MP, Richon VM, Copeland RA, Keilhack H, Pollock RM, Kuntz KW. A selective inhibitor of EZH2 blocks H3K27 methylation and kills mutant lymphoma cells. Nat Chem Biol 2012; 8:890-6. [PMID: 23023262 DOI: 10.1038/nchembio.1084] [Citation(s) in RCA: 603] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Accepted: 07/13/2012] [Indexed: 12/24/2022]
Abstract
EZH2 catalyzes trimethylation of histone H3 lysine 27 (H3K27). Point mutations of EZH2 at Tyr641 and Ala677 occur in subpopulations of non-Hodgkin's lymphoma, where they drive H3K27 hypertrimethylation. Here we report the discovery of EPZ005687, a potent inhibitor of EZH2 (K(i) of 24 nM). EPZ005687 has greater than 500-fold selectivity against 15 other protein methyltransferases and has 50-fold selectivity against the closely related enzyme EZH1. The compound reduces H3K27 methylation in various lymphoma cells; this translates into apoptotic cell killing in heterozygous Tyr641 or Ala677 mutant cells, with minimal effects on the proliferation of wild-type cells. These data suggest that genetic alteration of EZH2 (for example, mutations at Tyr641 or Ala677) results in a critical dependency on enzymatic activity for proliferation (that is, the equivalent of oncogene addiction), thus portending the clinical use of EZH2 inhibitors for cancers in which EZH2 is genetically altered.
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8
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Daigle SR, Olhava EJ, Therkelsen CA, Majer CR, Sneeringer CJ, Song J, Johnston LD, Scott MP, Smith JJ, Xiao Y, Jin L, Kuntz KW, Chesworth R, Moyer MP, Bernt KM, Tseng JC, Kung AL, Armstrong SA, Copeland RA, Richon VM, Pollock RM. Selective killing of mixed lineage leukemia cells by a potent small-molecule DOT1L inhibitor. Cancer Cell 2011; 20:53-65. [PMID: 21741596 PMCID: PMC4046888 DOI: 10.1016/j.ccr.2011.06.009] [Citation(s) in RCA: 699] [Impact Index Per Article: 53.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2010] [Revised: 05/09/2011] [Accepted: 06/16/2011] [Indexed: 01/27/2023]
Abstract
Mislocated enzymatic activity of DOT1L has been proposed as a driver of leukemogenesis in mixed lineage leukemia (MLL). The characterization of EPZ004777, a potent, selective inhibitor of DOT1L is reported. Treatment of MLL cells with the compound selectively inhibits H3K79 methylation and blocks expression of leukemogenic genes. Exposure of leukemic cells to EPZ004777 results in selective killing of those cells bearing the MLL gene translocation, with little effect on non-MLL-translocated cells. Finally, in vivo administration of EPZ004777 leads to extension of survival in a mouse MLL xenograft model. These results provide compelling support for DOT1L inhibition as a basis for targeted therapeutics against MLL.
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Affiliation(s)
| | | | | | | | | | - Jeffrey Song
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
| | | | | | - Jesse J. Smith
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
| | - Yonghong Xiao
- Belfer Institute for Applied Cancer Science, Dana-Farber Cancer Institute, Boston, MA 02115, USA
| | - Lei Jin
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
| | - Kevin W. Kuntz
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
| | | | - Mikel P. Moyer
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
| | - Kathrin M. Bernt
- Division of Hematology/Oncology, Children’s Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02115, USA
| | - Jen-Chieh Tseng
- Lurie Family Imaging Center, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Andrew L. Kung
- Division of Hematology/Oncology, Children’s Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02115, USA
- Lurie Family Imaging Center, Dana-Farber Cancer Institute, Boston, MA 02215, USA
| | - Scott A. Armstrong
- Division of Hematology/Oncology, Children’s Hospital and Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02115, USA
- Harvard Stem Cell Institute, Boston, MA 02138, USA
| | | | | | - Roy M. Pollock
- Epizyme, Inc., 325 Vassar Street, Cambridge, MA 02139 USA
- Correspondence:
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Richon VM, Johnston D, Sneeringer CJ, Jin L, Majer CR, Elliston K, Jerva LF, Scott MP, Copeland RA. Chemogenetic analysis of human protein methyltransferases. Chem Biol Drug Des 2011; 78:199-210. [PMID: 21564555 DOI: 10.1111/j.1747-0285.2011.01135.x] [Citation(s) in RCA: 153] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A survey of the human genome was performed to understand the constituency of protein methyltransferases (both protein arginine and lysine methyltransferases) and the relatedness of their catalytic domains. We identified 51 protein lysine methyltransferase proteins based on similarity to the canonical Drosophila Su(var)3-9, enhancer of zeste (E(z)), and trithorax (trx) domain. Disruptor of telomeric silencing-1-like, a known protein lysine methyltransferase, did not fit within the protein lysine methyltransferase family, but did group with the protein arginine methyltransferases, along with 44 other proteins, including the METTL and NOP2/Sun domain family proteins. We show that a representative METTL, METTL11A, demonstrates catalytic activity as a histone methyltransferase. We also solved the co-crystal structures of disruptor of telomeric silencing-1-like with S-adenosylmethionine and S-adenosylhomocysteine bound in its active site. The conformation of both ligands is virtually identical to that found in known protein arginine methyltransferases, METTL and NOP2/Sun domain family proteins and is distinct from that seen in the Drosophila Su(var)3-9, enhancer of zeste (E(z)), and trithorax (trx) domain protein lysine methyltransferases. We have developed biochemical assays for 11 members of the protein methyltransferase target class and have profiled the affinity of three ligands for these enzymes: the common methyl-donating substrate S-adenosylmethionine; the common reaction product S-adenosylhomocysteine; and the natural product sinefungin. The affinity of each of these ligands is mapped onto the family trees of the protein lysine methyltransferases and protein arginine methyltransferases to reveal patterns of ligand recognition by these enzymes.
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Affiliation(s)
- Victoria M Richon
- Epizyme, Inc., 840 Memorial Drive, Cambridge, MA 02139, USA Genstruct Inc., One Alewife Center, Cambridge, MA 02140, USA
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