Prodigiosin

Prodigiosin is a red tripyrrole alkaloid pigment originally isolated from Serratia marcescens and a prototypical member of the prodiginine family. Biosynthetically formed by coupling of methoxybipyrrolecarboxaldehyde and a monopyrrole unit, it exhibits broad biological activities including antibacterial, antifungal, antimalarial, and anticancer effects. Mechanistically, prodigiosin induces apoptosis in cancer cells by activating PP2A and suppressing Akt signaling, leading to p53/p21 upregulation and cell cycle arrest. Additional studies highlight its immunomodulatory properties and ability to inhibit biofilm formation. Prodigiosin therefore serves as a multifunctional natural product scaffold for oncology, infection, and chemical biology research.