A natural fungal metabolite which reversibly interferes with protein trafficking and secretion mediated by the Golgi apparatus and endoplasmic reticulum; directly and reversibly inhibits Sec7 domain-containing GEFs which are necessary for Arf activation associated with vesicular transport (IC50 =…

Brefeldin A is a lactone antibiotic found in fungi such as Eupenicillium; it exhibits anticancer and antiviral activities. Brefeldin A inhibits activity of guanine nucleotide exchange factors, preventing association with COPI and COPI-mediated vesicle formation and suppressing protein transport…