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Leptomycin B (Elactocin, Antibiotic ATS 1287B, Antibiotic CI 940, Antibiotic CL 1957A, Antibiotic PD 114720, Mantuamycin)

Cat no: L1671-38A


Supplier: United States Biological
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Leptomycin B is the dominant and most studied member of the leptomycin class isolated from selected Streptomyces strains. Leptomycin B is a nanomolar active and specific nuclear export inhibitor. Its target is CRM1/exportin1 a protein in the nuclear export sequence (NES). Examples of proteins affected are c-Abl, cyclin B1, HIV-1 Rev, IkB, MPF, MAP/ERK, MDM2/p53, NF-kB/IkB7 and PKA. Export of many RNAs are also inhibited e.g. COX-2 and c-FOS mRNA. In addition Leptomycin B shows antifungal and antibacterial and potent antitumour activities. Purity: >99% by HPLC Form: Colorless film Solubility: Soluble in ethanol or methanol. Ethanol is recommended. Unstable in DMSO. Storage and Stability: Stable for 6 months at -20 degrees C. Related to: Anguinomycin A, Leptomycin A, Kazusamycin A, Kazusamycin B
Catalogue number: L1671-38A
Size: 500ug
Form: Colorless film
Purity: >99% by HPLC
Alternative names: Elactocin, Antibiotic ATS 1287B, Antibiotic CI 940, Antibiotic CL 1957A, Antibiotic PD 114720, Mantuamycin
References: 1. Leptomycin B, an inhibitor of the nuclear export receptor CRM1, inhibits COX-2 expression. Jang B.C. et al. J. Biol. Chem. 2003, 278, 2773. 2. Leptomycin B inhibition of signal-mediated nuclear export by direct binding to CRM1. Kudo N. et al. Exp. Cell. Res. 1998, 242, 540. 3. Nuclear-cytoplasmic shuttling of C-ABL tyrosine kinase. Taagepera S. et al. Proc. Natl. Acad. Sci. USA 1998, 95, 7457. 4. CRM1 is responsible for intracellular transport mediated by the nuclear export signal. Fukuda M. et al. Nature 1997, 390, 308.

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