生物活性
Leptomycins are antifungal antibiotics with unique unsaturated, branched-chain fatty acid structures.The physiochemical and biological properties of Leptomycins A and B are very similar.Both are considered to be specific inhibitors of nuclear export. The suggested inhibition mechanism involves the direct binding of leptomycins to CRM1 (Exportin-1), which is the main nuclear export protein. This blocks the binding of CRM1 to proteins containing a nuclear export signal (NES),and therefore prevents their export from the nucleus. Although more research on nuclear export inhibition has been performed using Leptomycin B, it has been shown that Leptomycin A has similar effects and can induce, for example, nuclearaccumulation of wild-type ERK5.
Leptomycin A is also active againstSchizosaccaromyces pombeandMucor rouxianus.
化学数据
| 分子量 | 526.7 |
| 分子式 | C32H46O6 |
| CAS号 | 87081-36-5 |
| 纯度 | >98% |
| 溶解性（25°C） | |
| 储存和运输条件 | 固体粉末： -20°C 冷藏长期储存
常温运输及临时存放 |
不同实验动物依据体表面积的等效剂量转换表（数据来源于FDA指南）
| 小鼠 | 大鼠 | 兔 | 豚鼠 | 仓鼠 | 狗 |
| 重量 (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| 体表面积 (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km系数 | 3 | 6 | 12 | 8 | 5 | 20 |
| 动物 A (mg/kg) = 动物 B (mg/kg) × | 动物 B的Km系数 |
| 动物 A的Km系数 |
例如，依据体表面积折算法，将化合物用于小鼠的剂量20 mg/kg 换算成大鼠的剂量，需要将20 mg/kg 乘以小鼠的Km系数（3），再除以大鼠的Km系数（6），得到化合物用于大鼠的等效剂量为10 mg/kg。
储备液配制
以下数据基于产品分子量，对于特殊产品，请参照COA中的储备液配制条件和说明进行操作。
| Concentration / Solvent Volume / Mass | 1 mg | 5 mg | 10 mg |
|---|
| 1 mM | 1.8986 mL | 9.4931 mL | 18.9861 mL |
| 5 mM | 0.3797 mL | 1.8986 mL | 3.7972 mL |
| 10 mM | 0.1899 mL | 0.9493 mL | 1.8986 mL |
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