A proteome-wide CDK/CRK-specific kinase inhibitor promotes tumor cell death in the absence of cell cycle progression.
The identification of molecular determinants of tumor cell survival is an important objective in cancer research. Here, we describe a small-molecule kinase inhibitor (RGB-286147), which, besides inhibiting tumor cell cycle progression, exhibits potent cytotoxic activity toward noncycling tumor cells, but not nontransformed quiescent fibroblasts. Extensive yeast three-hybrid (Y3H)-based proteome/kinome scanning with chemical dimerizers revealed CDK1/2/3/5/7/9 and the less well-characterized CDK-related kinases (CRKs) p42/CCRK, PCTK1/3, and PFTK1 as its predominant targets. Thus, RGB-286147 is a proteome-wide CDK/CRK-specific kinase inhibitor whose further study could yield new insight into molecular determinants of tumor cell survival. Our results also suggest that the [1, 3, 6]-tri-substituted-pyrazolo[3,4-d]-pyrimidine-4-one kinase inhibitor scaffold is a promising template for the rational design of kinase inhibitors with potential applications to disease indications other than cancer, such as neurodegeneration, cardiac hypertrophic growth, and AIDS.
Caligiuri
Maureen
M
GPC Biotech, Inc., Waltham, Massachusetts 02451, USA.
Becker
Frank
F
Murthi
Krishna
K
Kaplan
Faith
F
Dedier
Severine
S
Kaufmann
Christine
C
Machl
Andy
A
Zybarth
Gabriele
G
Richard
Judson
J
Bockovich
Nick
N
Kluge
Art
A
Kley
Nikolai
N
D000970:Antineoplastic Agents / Q000494:pharmacology; D017209:Apoptosis / Q000187:drug effects*; D002453:Cell Cycle; D045744:Cell Line, Tumor; D018844:Cyclin-Dependent Kinases / Q000037:antagonists & inhibitors*; D004354:Drug Screening Assays, Antitumor; D045325:HCT116 Cells; D006801:Humans; D047908:Intracellular Signaling Peptides and Proteins / Q000145:classification / Q000494:pharmacology*; D020543:Proteome / Q000187:drug effects*; D011743:Pyrimidines / Q000145:classification / Q000494:pharmacology*
D000970:Antineoplastic Agents; D047908:Intracellular Signaling Peptides and Proteins; D020543:Proteome; D011743:Pyrimidines; C015482:protein kinase modulator; D018844:Cyclin-Dependent Kinases