Spiro-Oxanthromicin A

Spiro-Oxanthromicin A

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Spiro-Oxanthromicin A
Category Enzyme inhibitors
Catalog number BBF-05246
CAS 1616622-10-6
Molecular Weight 618.58
Molecular Formula C36H26O10
Purity ≥95% by HPLC

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Description

Spiro-Oxanthromicin A is a polyketide first isolated from a soil-derived Streptomyces sp. Spiro-Oxanthromicin A inhibits mislocalisation of the oncogenic mutant K-Ras from the plasma membrane of intact Madin-Darby canine kidney (MDCK) cells. It inhibits Bacillus cereus but has no activity against HSV-1, Mycobacterium tuberculosis H37Ra and phytopathogenic fungi.

Specification

Synonyms Oxanthromicin A, spiro; (±)-spiro-oxanthromicin A; 2',7'-dihydro-2,5,6',10'-tetrahydroxy-4,5',6,8'-tetramethyl-7',10-dioxo-spiro[anthracene-9(10H),3'-[3H]benz[de]anthracene]-3,9'-dicarboxylic acid; 2,5,6',10'-tetrahydroxy-4,5',6,8'-tetramethyl-7',10-dioxo-2',7'-dihydro-10H-spiro[anthracene-9,3'-benzo[de]anthracene]-3,9'-dicarboxylic acid
Storage Store at -20°C
IUPAC Name 3',6,8',10-tetrahydroxy-1',5,7',8-tetramethyl-7,9'-dioxospiro[2H-benzo[a]phenalene-3,10'-anthracene]-2',9-dicarboxylic acid
Canonical SMILES CC1=C(C2=C(C=C1)C3(CC=C4C5=CC(=C(C(=C5C(=O)C6=C(C(=CC3=C46)C)O)C)C(=O)O)O)C7=CC(=C(C(=C7C2=O)C)C(=O)O)O)O
InChI InChI=1S/C36H26O10/c1-12-5-6-18-28(30(12)39)33(42)24-15(4)26(35(45)46)22(38)11-20(24)36(18)8-7-16-17-10-21(37)25(34(43)44)14(3)23(17)32(41)29-27(16)19(36)9-13(2)31(29)40/h5-7,9-11,37-40H,8H2,1-4H3,(H,43,44)(H,45,46)
InChI Key GLAYNHMYQPENCN-UHFFFAOYSA-N

Properties

Appearance Solid
Antibiotic Activity Spectrum Bacteria
Boiling Point 908.4±65.0°C at 760 mmHg
Density 1.7±0.1 g/cm3
Solubility Soluble in DMSO, Methanol

Reference Reading

1. Rare Streptomyces sp. polyketides as modulators of K-Ras localisation
Angela A Salim, Xue Xiao, Kwang-Jin Cho, Andrew M Piggott, Ernest Lacey, John F Hancock, Robert J Capon Org Biomol Chem. 2014 Jul 21;12(27):4872-8. doi: 10.1039/c4ob00745j.
Chemical investigations of a soil-derived Streptomyces sp. led to the isolation of five new polyketides, (+)-oxanthromicin, (±)-hemi-oxanthromicins A/B, (±)-spiro-oxanthromicin A and oxanthroquinone, and the known alkaloid staurosporine, and the detection of four new metastable analogues, (±)-spiro-oxanthromicins B1/B2/C1/C2. Among the compounds tested, SAR investigations established that the synthetic oxanthroquinone ethyl ester and 3-O-methyl-oxanthroquinone ethyl ester were optimal at mislocalising oncogenic mutant K-Ras from the plasma membrane of intact Madin-Darby canine kidney (MDCK) cells (IC50 4.6 and 1.2 μM), while a sub-EC50 dose of (±)-spiro-oxanthromicin A was optimal at potentiating (750%) the K-Ras inhibitory activity of staurosporine (IC50 60 pM). These studies demonstrate that a rare class of Streptomyces polyketide modulates K-Ras plasma membrane localisation, with implications for the future treatment of K-Ras dependent cancers.

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