Synthesis and Biological Evaluation of Cycloalkylidene Carboxylic Acids as Novel Effectors of Ras/Raf Interaction
作者:Anke Friese、Katja Hell-Momeni、Ilse Zündorf、Thomas Winckler、Theodor Dingermann、Gerd Dannhardt
DOI:10.1021/jm011101q
日期:2002.3.1
The protooncogenes Ras and Raf play important roles in signal transduction pathways regulated by mitogen-activated protein kinases. Mutations of Ras that arrest the protein in its active state are frequently implicated in tumor formation. We used Ras and Raf proteins in the yeast two-hybrid system to search for natural or synthesized substances capable of modulating Ras/ Raf interaction by specifically binding to one of the interacting partners. We found that cycloalkylidene carboxylic acids enhanced Ras/Raf interaction by acting on the cysteine-rich domain of Raf. Several analogues of the active substance 2-cyclohexylidene propanoic acid were synthesized and the importance of the semicyclic double bond in the stabilization of Ras/Raf interaction was demonstrated. Variation of the size and the substituents of the cyclic system as well as the length of the carboxylic acid resulted in enhanced Ras/Raf interaction.