Cited by 1,369Protein Kinase Regulation and GTPase SignalingPI3K/AKT/mTOR signaling in cancerCancer Mechanisms and Therapy

The specificities of protein kinase inhibitors: an update

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BAIN, Jenny, McLAUCHLAN, Hilary, ELLIOTT, Matthew, COHEN, Philip·2003·Biochemical Journal

Abstract

We have previously examined the specificities of 28 commercially available compounds, reported to be relatively selective inhibitors of particular serine/threonine-specific protein kinases [Davies, Reddy, Caivano and Cohen (2000) Biochem. J. 351, 95—105]. In the present study, we have extended this analysis to a further 14 compounds. Of these, indirubin-3′-monoxime, SP 600125, KT 5823 and ML-9 were found to inhibit a number of protein kinases and conclusions drawn from their use in cell-based assays are likely to be erroneous. Kenpaullone, Alsterpaullone, Purvalanol, Roscovitine, pyrazolopyrimidine 1 (PP1), PP2 and ML-7 were more specific, but still inhibited two or more protein kinases with similar potency. Our results suggest that the combined use of Roscovitine and Kenpaullone may be useful for identifying substrates and physiological roles of cyclin-dependent protein kinases, whereas the combined use of Kenpaullone and LiCl may be useful for identifying substrates and physiological roles of glycogen synthase kinase 3. The combined use of SU 6656 and either PP1 or PP2 may be useful for identifying substrates of Src family members. Epigallocatechin 3-gallate, one of the main polyphenolic constituents of tea, inhibited two of the 28 protein kinases in the panel, dual-specificity, tyrosine-phosphorylated and regulated kinase 1A (DYRK1A; IC50 = 0.33μM) and p38-regulated/activated kinase (PRAK; IC50 = 1.0μM).

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  • A recent study found that SP600125 is not highly JNK-specific and that it blocks some protein kinases as strongly or more strongly than JNK.

    “The latest result demonstrates that the JNK specificity of SP600125 is not so excellent and this compound inhibits some protein kinases with similar or greater potency than JNK (Bain et al , 2003).”

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Authors
BAIN, J., McLAUCHLAN, H., ELLIOTT, M., & COHEN, P.
Affiliations
University of Dundee (GB)
Corresponding author
  • BAIN, Jenny
  • McLAUCHLAN, Hilary
  • ELLIOTT, Matthew
  • COHEN, Philip
Venue
Biochemical Journal
Published
2003-04-01
Volume
371
Issue
1
Pages
199-204
ISSN
  • 0264-6021 (ISSN-L)
  • 1470-8728
OpenAlex
W2011588737
Cited by
1,369
References
42
Citations by year
2026: 9 · 2025: 21 · 2024: 12 · 2023: 16 · 2022: 26 · 2021: 35 · 2020: 28 · 2019: 38 · 2018: 42 · 2017: 48 · 2016: 42 · 2015: 44 · 2014: 52 · 2013: 66 · 2012: 70
FWCI
43.75
Type
journal article
Language
en
Open access
Locations
  • Biochemical Journal (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Discovery Research Portal (University of Dundee) (submittedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cancer Mechanisms and Therapy
Keywords
protein kinase inhibitors, kinase selectivity, serine/threonine kinase, indirubin-3'-monoxime, KT5823, ML-9, kenpaullone, roscovitine, pyrazolopyrimidines, cyclin-dependent kinases, glycogen synthase kinase-3, Src family kinases, epigallocatechin gallate, DYRK1A, kinase substrate identification
MeSH terms
Alkaloids, Anthracenes, Azepines, Benzazepines, Carbazoles, Catechin, Enzyme Inhibitors, Indoles, Kinetin, Naphthalenes, Oximes, Purines, Pyrazoles, Pyrimidines, Substrate Specificity, Signal Transduction, Cyclin-Dependent Kinases, src-Family Kinases, Mitogen-Activated Protein Kinases, Glycogen Synthase Kinase 3, Protein Kinase Inhibitors, JNK Mitogen-Activated Protein Kinases

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