Specific CLK inhibitors from a novel chemotype for regulation of alternative splicing
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Specific CLK inhibitors from a novel chemotype for regulation of alternative splicing. / Fedorov, Oleg; Huber, Kilian; Eisenreich, Andreas; Filippakopoulos, Panagis; King, Oliver; Bullock, Alex N; Szklarczyk, Damian; Jensen, Lars J; Fabbro, Doriano; Trappe, Jörg; Rauch, Ursula; Bracher, Franz; Knapp, Stefan.
In: Chemistry & Biology, Vol. 18, No. 1, 2011, p. 67-76.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Specific CLK inhibitors from a novel chemotype for regulation of alternative splicing
AU - Fedorov, Oleg
AU - Huber, Kilian
AU - Eisenreich, Andreas
AU - Filippakopoulos, Panagis
AU - King, Oliver
AU - Bullock, Alex N
AU - Szklarczyk, Damian
AU - Jensen, Lars J
AU - Fabbro, Doriano
AU - Trappe, Jörg
AU - Rauch, Ursula
AU - Bracher, Franz
AU - Knapp, Stefan
N1 - Copyright © 2011 Elsevier Ltd. All rights reserved.
PY - 2011
Y1 - 2011
N2 - There is a growing recognition of the importance of protein kinases in the control of alternative splicing. To define the underlying regulatory mechanisms, highly selective inhibitors are needed. Here, we report the discovery and characterization of the dichloroindolyl enaminonitrile KH-CB19, a potent and highly specific inhibitor of the CDC2-like kinase isoforms 1 and 4 (CLK1/CLK4). Cocrystal structures of KH-CB19 with CLK1 and CLK3 revealed a non-ATP mimetic binding mode, conformational changes in helix aC and the phosphate binding loop and halogen bonding to the kinase hinge region. KH-CB19 effectively suppressed phosphorylation of SR (serine/arginine) proteins in cells, consistent with its expected mechanism of action. Chemical inhibition of CLK1/CLK4 generated a unique pattern of splicing factor dephosphorylation and had at low nM concentration a profound effect on splicing of the two tissue factor isoforms flTF (full-length TF) and asHTF (alternatively spliced human TF).
AB - There is a growing recognition of the importance of protein kinases in the control of alternative splicing. To define the underlying regulatory mechanisms, highly selective inhibitors are needed. Here, we report the discovery and characterization of the dichloroindolyl enaminonitrile KH-CB19, a potent and highly specific inhibitor of the CDC2-like kinase isoforms 1 and 4 (CLK1/CLK4). Cocrystal structures of KH-CB19 with CLK1 and CLK3 revealed a non-ATP mimetic binding mode, conformational changes in helix aC and the phosphate binding loop and halogen bonding to the kinase hinge region. KH-CB19 effectively suppressed phosphorylation of SR (serine/arginine) proteins in cells, consistent with its expected mechanism of action. Chemical inhibition of CLK1/CLK4 generated a unique pattern of splicing factor dephosphorylation and had at low nM concentration a profound effect on splicing of the two tissue factor isoforms flTF (full-length TF) and asHTF (alternatively spliced human TF).
KW - Alternative Splicing
KW - Catalytic Domain
KW - Endothelial Cells
KW - Heterocyclic Compounds, 2-Ring
KW - Humans
KW - Models, Molecular
KW - Nitriles
KW - Phosphorylation
KW - Protein Kinase Inhibitors
KW - Protein-Serine-Threonine Kinases
KW - Protein-Tyrosine Kinases
KW - RNA, Messenger
KW - RNA-Binding Proteins
KW - Substrate Specificity
KW - Thromboplastin
U2 - 10.1016/j.chembiol.2010.11.009
DO - 10.1016/j.chembiol.2010.11.009
M3 - Journal article
C2 - 21276940
VL - 18
SP - 67
EP - 76
JO - Chemistry and Biology
JF - Chemistry and Biology
SN - 2451-9448
IS - 1
ER -
ID: 40291054