Determine the necessary mass, volume, or concentration for preparing a solution.
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Leptomycin B is an anti-fungal antibiotic, anti-tumor cytotoxin that inhibits CRM1-dependent, NES-dependent nucleo-cytoplasmic translocation (nuclear export inhibitor). NES containing proteins include HIV-1 REV; actin, c-Abl, cyclin B1, MDM2/p53, IB, MPF, PKA and MEK.
Leptomycin B is a potent and specific nuclear export inhibitor. Leptomycin B alkylates and inhibits CRM1 (chromosomal region maintenance)/exportin 1, a protein required for nuclear export of proteins containing a nuclear export sequence (NES). In addition to antifungal and antibacterial activities, Leptomycin B blocks the cell cycle and is a potent anti-tumor agent. At low nM concentrations, Leptomycin B blocks the nuclear export of many proteins including HIV-1 Rev, MAPK/ERK, and NF-κB/IκB, and it stabilizes the expression of p53. Leptomycin B also inhibits the export and translation of many RNAs, including COX-2 and c-Fos mRNAs, by inhibiting export of ribonucleoproteins.
Taxonomy Tree
| Kingdom | Organic compounds |
|---|---|
| Superclass | Lipids and lipid-like molecules |
| Clase | Fatty Acyls |
| Subclass | Fatty acids and conjugates |
| Intermediate Tree Nodes | Not available |
| Direct Parent | Very long-chain fatty acids |
| Alternative Parents | Diterpene lactones Diterpenoids Methyl-branched fatty acids Hydroxy fatty acids Heterocyclic fatty acids Dihydropyranones Unsaturated fatty acids Beta-hydroxy ketones Dicarboxylic acids and derivatives Enoate esters Secondary alcohols Lactones Oxacyclic compounds Carboxylic acids Hydrocarbon derivatives Organic oxides |
| Molecular Framework | Aliphatic heteromonocyclic compounds |
| Substituents | Very long-chain fatty acid - Diterpene lactone - Diterpenoid - Branched fatty acid - Dihydropyranone - Methyl-branched fatty acid - Heterocyclic fatty acid - Hydroxy fatty acid - Beta-hydroxy ketone - Dicarboxylic acid or derivatives - Unsaturated fatty acid - Pyran - Alpha,beta-unsaturated carboxylic ester - Enoate ester - Carboxylic acid ester - Secondary alcohol - Lactone - Ketone - Organoheterocyclic compound - Oxacycle - Carboxylic acid - Carboxylic acid derivative - Hydrocarbon derivative - Alcohol - Carbonyl group - Organooxygen compound - Organic oxygen compound - Organic oxide - Aliphatic heteromonocyclic compound |
| Descripción | This compound belongs to the class of organic compounds known as very long-chain fatty acids. These are fatty acids with an aliphatic tail that contains at least 22 carbon atoms. |
| External Descriptors | leptomycin |
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| Solubilidad | Soluble in ethanol or methanol. Ethanol is recommended. Unstable in DMSO |
|---|---|
| Sensibilidad | Moisture sensitive,Light sensitive |
| Punto de inflamación (°F) | 64.4 °F |
| Punto de inflamación (°C) | 18 °C |
| Peso molecular | 540.700 g/mol |
| XLogP3 | 7.900 |
| Hydrogen Bond Donor Count | 2 |
| Hydrogen Bond Acceptor Count | 6 |
| Rotatable Bond Count | 15 |
| Exact Mass | 540.345 Da |
| Monoisotopic Mass | 540.345 Da |
| Topological Polar Surface Area | 101.000 Ų |
| Heavy Atom Count | 39 |
| Formal Charge | 0 |
| Complexity | 1020.000 |
| Isotope Atom Count | 0 |
| Defined Atom Stereocenter Count | 7 |
| Undefined Atom Stereocenter Count | 0 |
| Defined Bond Stereocenter Count | 5 |
| Undefined Bond Stereocenter Count | 0 |
| The total count of all stereochemical bonds | 5 |
| Covalently-Bonded Unit Count | 1 |
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