Leptomycin B is a potent inhibitor of the nuclear export of proteins. It directly blocks the interaction of CRM1 -exportin 1) with nuclear export signals -NES), preventing the export of a broad range of proteins. Leptomycin B will also indirectly inhibit the export of mRNA from the nucleus by blocking the nuclear export of mRNA-binding proteins -export factors). By blocking the nuclear export of p53, leptomycin B prevents entry of human normal fibroblasts into the S phase of the cell cycle, thus inhibiting proliferation. Leptomycin B was originally identified as an antifungal agent and is isolated from Streptomyces sp..
產(chǎn)品描述
A potent anti-fungal antibiotic that can directly block nuclear transport by inhibiting the action of CRM1; inhibits nuclear export of HIV-1 Rev -IC50 = 0.53)