Organic Chemical
okadaic acid
Subclass of:
Ethers, Cyclic; Marine Toxins
Definitions related to okadaic acid:
  • A cyclic polyether ionophore extracted from the black sponge Halichondria; inhibits protein phosphatases such as Cdc25 which serve as off switches for cell proliferation, and therefore acts as a tumor promoter; NLM also lists as a vasoconstrictor.
    CRISP Thesaurus
    National Institutes of Health, 2006
  • A specific inhibitor of phosphoserine/threonine protein phosphatase 1 and 2a. It is also a potent tumor promoter. It is produced by DINOFLAGELLATES and causes diarrhetic SHELLFISH POISONING.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2025
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