Definition of "thioester" []

• Any of several classes of organic compound in which one or both oxygen atoms of an ester group are replaced by those of sulfur (noun)

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• "The alternative pathway is initiated by members of the thioester protein family, which, in the sea urchin, was somewhat expanded with four genes."
• "Two of the thioester proteins, SpC3 and SpC3-2, are known to be expressed, respectively, in coelomocytes and in embryos and larvae."
• "It is known that an adenylated substrate, bound to an E1 enzyme's adenylation site, forms a thioester link with a key cysteine at its other site, the Cys domain."