CHEBI:66252 - topopyrone A

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ChEBI Name topopyrone A
ChEBI ID CHEBI:66252
Definition A naphthochromene that is 4H-naphtho[2,3-h]chromene-4,7,12-trione substituted by a chloro group at position 10, hydroxy groups at positions 5, 9 and 11 and a methyl group at position 2. It is isolated from a fungal strain Phoma sp.BAUA2861 and acts as an inhibitor of the enzyme topoisomerase I.
Stars This entity has been manually annotated by the ChEBI Team.
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Roles Classification
Biological Role(s): antimicrobial agent
A substance that kills or slows the growth of microorganisms, including bacteria, viruses, fungi and protozoans.
EC 5.99.1.2 (DNA topoisomerase) inhibitor
A topoisomerase inhibitor that inhibits the bacterial enzymes of the DNA topoisomerases, Type I class (EC 5.99.1.2) that catalyze ATP-independent breakage of one of the two strands of DNA, passage of the unbroken strand through the break, and rejoining of the broken strand. These bacterial enzymes reduce the topological stress in the DNA structure by relaxing negatively, but not positively, supercoiled DNA.
antiviral agent
A substance that destroys or inhibits replication of viruses.
metabolite
Any intermediate or product resulting from metabolism. The term 'metabolite' subsumes the classes commonly known as primary and secondary metabolites.
Application(s): antineoplastic agent
A substance that inhibits or prevents the proliferation of neoplasms.
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