Cited by 137Chronic Lymphocytic Leukemia ResearchProtein Degradation and InhibitorsLung Cancer Treatments and Mutations

Battling Btk mutants with noncovalent inhibitors that overcome Cys481 and Thr474 mutations

Johnson, Adam R., Kohli, Pawan Bir, Katewa, Arna, Gogol, Emily, Belmont, Lisa D., Choy, Regina, Penuel, Elicia, Burton, Luciana +14 more·2016·ACS Chemical Biology

Abstract

The Bruton's tyrosine kinase (Btk) inhibitor ibrutinib has shown impressive clinical efficacy in a range of B-cell malignancies. However, acquired resistance has emerged, and second generation therapies are now being sought. Ibrutinib is a covalent, irreversible inhibitor that modifies Cys481 in the ATP binding site of Btk and renders the enzyme inactive, thereby blocking B-cell receptor signal transduction. Not surprisingly, Cys481 is the most commonly mutated Btk residue in cases of acquired resistance to ibrutinib. Mutations at other sites, including Thr474, a gatekeeper residue, have also been detected. Herein, we describe noncovalent Btk inhibitors that differ from covalent inhibitors like ibrutinib in that they do not interact with Cys481, they potently inhibit the ibrutinib-resistant Btk C481S mutant in vitro and in cells, and they are exquisitely selective for Btk. Noncovalent inhibitors such as GNE-431 also show excellent potency against the C481R, T474I, and T474M mutants. X-ray crystallographic analysis of Btk provides insight into the unique mode of binding of these inhibitors that explains their high selectivity for Btk and their retained activity against mutant forms of Btk. This class of noncovalent Btk inhibitors may provide a treatment option to patients, especially those who have acquired resistance to ibrutinib by mutation of Cys481 or Thr474.

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Crossref · 10.1021/acschembio.6b00480

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  • New-generation noncovalent BTK inhibitors retain activity against Cys481 and gatekeeper Thr474 point mutants.

    “Newgeneration noncovalent BTK inhibitors have been developed that retain activity against the Cys481 and gatekeeper Thr474 point mutants.34”
  • Many noncovalent BTK inhibitors have activity on WT and C481-mutant BTK with equal potency, and some consistently inhibit all mutants.

    “Many of these noncovalent inhibitors have activity on WT and C481-mutant BTK with equal potency, and some even consistently inhibit all mutants.”

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Authors
Johnson, A. R., Kohli, P. B., Katewa, A., Gogol, E., Belmont, L. D., Choy, R., Penuel, E., Burton, L., Eigenbrot, C., Yu, C., Ortwine, D. F., Bowman, K., Franke, Y., Tam, C., Estevez, A., Mortara, K., Wu, J., Li, H., Lin, M., Bergeron, P., Crawford, J. J., & Young, W. B.
Affiliations
Genentech (US)
Corresponding author
Johnson, Adam R.
Venue
ACS Chemical Biology
Published
2016-09-07
Volume
11
Issue
10
Pages
2897-2907
ISSN
  • 1554-8929 (ISSN-L)
  • 1554-8937
OpenAlex
W2518577288
Cited by
137
References
44
Citations by year
2026: 5 · 2025: 7 · 2024: 12 · 2023: 16 · 2022: 16 · 2021: 21 · 2020: 19 · 2019: 18 · 2018: 13 · 2017: 9 · 2016: 1
FWCI
10.39
Type
journal article
Language
en
Open access
closed
Locations
  • ACS Chemical Biology (publishedVersion)
  • PubMed (publishedVersion)
  • OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) (submittedVersion)
Topics
  • Health Sciences › Medicine › Genetics › Chronic Lymphocytic Leukemia Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Degradation and Inhibitors
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Lung Cancer Treatments and Mutations
Keywords
Bruton's tyrosine kinase, BTK inhibitors, ibrutinib resistance, non-covalent inhibitors, B-cell malignancies, B cell receptor signaling, kinase selectivity, inhibitor binding mode, crystal structure
MeSH terms
Agammaglobulinaemia Tyrosine Kinase, Adenine, Antineoplastic Agents, Cysteine, Humans, Kinetics, Mutation, Piperidines, Protein-Tyrosine Kinases, Pyrazoles, Pyrimidines, Threonine, Leukemia, Lymphocytic, Chronic, B-Cell, Protein Kinase Inhibitors

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