Fascaplysin as a specific inhibitor for CDK4: insights from molecular modelling.
Cyclin-dependent kinases (CDKs) play a key role in the cell cycle and are important anti-cancer drug targets. The natural product fascaplysin inhibits CDK4 with surprising selectivity (IC(50) = 0.4 µM) compared to the close homolog CDK2 (IC(50) = 500 µM). Free energy calculations of the positively charged fascaplysin and an uncharged iso-electronic derivative in the CDK2 and CDK4 inhibitor complexes indicate that the positive charge of fascaplysin is crucial for selectivity. This finding will guide further improvements in the design of fascaplysin-based selective inhibitors for CDK4.
Department of Biochemistry, University of Leicester, Leicester, United Kingdom.
Muhammad Imtiaz
MI
Shafiq
Thomas
T
Steinbrecher
Ralf
R
Schmid
D000595:Amino Acid Sequence; D002244:Carbon / Q000737:chemistry; D020134:Catalytic Domain; D002453:Cell Cycle; D051358:Cyclin-Dependent Kinase 4 / Q000037:antagonists & inhibitors* / Q000737:chemistry* / Q000378:metabolism; D018844:Cyclin-Dependent Kinases / Q000378:metabolism; D015195:Drug Design; D006639:Histidine / Q000737:chemistry; D006801:Humans; D007211:Indoles / Q000494:pharmacology*; D020128:Inhibitory Concentration 50; D008024:Ligands; D008239:Lysine / Q000737:chemistry; D008956:Models, Chemical; D056004:Molecular Dynamics Simulation; D008969:Molecular Sequence Data; D011485:Protein Binding; D013816:Thermodynamics; D000644:Quaternary Ammonium Compounds; D002243:Carbolines; D007212:Indolizines
D002244:Carbon; D051358:Cyclin-Dependent Kinase 4; D018844:Cyclin-Dependent Kinases; D006639:Histidine; D007211:Indoles; D008024:Ligands; D008239:Lysine; C069346:fascaplysine; D000644:Quaternary Ammonium Compounds; D002243:Carbolines; D007212:Indolizines; C495900:CDK4 protein, human