Manoalide is a calcium channel blocker. It has antibiotic, analgesic and anti-inflammatory effects and is found in some sponges, including the West Pacific species Luffariella variabilis.[1]
Its functions are made possible by the permanent blockage of phospholipase A2 and C[2] with lysine residues. This could be made possible through the functional groups incorporated in gamma-hydroxybutenolide, alpha-hydroxydihydropyran and the trimethylcyclohexenyl. The gamma-hydroxybutenolide ring is present in the reaction between manoalide and phospholipase A2, the hemiacetal in alpha-hydroxydihydropyran is needed for permanent binding and hydrophobic trimethylcyclohexenyl ring makes it possible for non-bonded interactions to interact between manoalide and phospholipase A2 to strengthen the reaction. [3] Due to its potential of permanent inhibition, it was made possible for it to take part in oral cancer[4] and hepatitis C[5] research.
^Brusca, Richard C. and Brusca, Gary J. Invertebrates. 2nd ed. Sinauer Associates, 2002. p. 202.