Alkyl cinnamates as regulator for the C1 domain of protein kinase C isoforms

作者：Mamidi Narsimha; Gorai Sukhamoy; Sahoo Jashobanta; Manna Debasis^*

来源：Chemistry and Physics of Lipids, 2012, 165(3): 320-330.

DOI：10.1016/j.chemphyslip.2012.02.010

• Protein kinase C regulators
• Curcumin
• Alkyl cinnamates
• Diacylglycerols
• Binding

The protein kinase C (PKC) family of serine/threonine kinases is an attractive drug target for the treatment of cancer and other diseases. Natural product curcumin is known to interact with PKC isoforms through the C1 domain and modulate PKC activity. The reported results demonstrate that the symmetric curcumin molecule might act as two separate units during its recognition of C1 domains. To understand the importance of the two halves of curcumin in PKC binding and to develop effective PKC regulators, we synthesized a series of alkyl cinnamates (1-8), characterized absorption and fluorescence properties and measured binding affinities with the C1b subdomains of PKC isoforms. The binding parameters of the monomeric compounds and liposomes containing compounds confirmed their interaction with the C1b subdomains of PKC delta and PKC theta. The molecular docking analysis with PKC delta and PKC theta C1b subdomains revealed that the alkyl cinnamates form hydrogen bond with the backbone of the protein at the same binding site as that of diacylglycerol and phorbol esters. The results show that the alkyl cinnamates bind to the activator binding site of PKCs and both methoxy and hydroxyl groups play important roles in the binding process.

• 出版日期2012-4