Maculosin is a diketopiperazine formed by the fusion of tyrosine and proline, reported as a secondary metabolite of fungi and bacteria. In Pseudomonas aeruginosa, maculosin is capable of activating N-acylhomoserine lactones (AHLs). Maculosin is also capable of activating or antagonizing other LuxR-based quorum-sensing systems. While the mode of action of maculosin is not known, its activity suggests the existence of cross talk among bacterial signalling systems. Maculosin was identified as a host-specific toxin produced by Alternaria alternata on spotted knapweed.
规格
别名
马库洛辛
英文别名
Cyclo-(Pro-Tyr)
规格或纯度
≥95%
英文名称
Maculosin
生化机理
Maculosin is a host-specific phytotoxin for spotted knapweed from Alternaria alternata. Maculosin is a quorum-sensing molecule involved in cell-cell communication by Pseudomonas aeruginosa. Maculosin also acts as a signaling molecule regulating virulence gene expression in Lactobacillus reuteri. Maculosin shows antioxidant, anti-cancer and non-toxicity properties. Maculosin shows cytotoxic activity against the human liver cancer cell lines, with an IC50 of 48.90 µg/mL