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Fluorescent chloramphenicol derivatives for determination of chloramphenicol acetyltransferase activity
Fluorescent chloramphenicol derivatives for determination of chloramphenicol acetyltransferase activity
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机译:荧光氯霉素衍生物,用于测定氯霉素乙酰转移酶的活性
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摘要
Fluorescent compounds useful in the determination of chloramphenicol acetyltransferase (CAT) enzyme activity are described. The compounds are fluorescent derivatives related in structure to chloramphenicol comprising a base, ##STR1## substituted at one to five aromatic ring positions by substituents, which may be the same or different, that are alkyl-, hydroxy-, alkoxy-, aryl-, halo-, nitro-, amino-, alkylamido-, or arylamido-; and a fluorescent moiety linked to the base at --NH-- by an aliphatic chain of 1-12 atoms other than hydrogen, where such atoms are carbon, nitrogen, oxygen, or sulfur, or combinations thereof. The substrate compounds are acylated in the presence of CAT to produce fluorescent mono- and diacylated products, which are then physically separated from the reaction mixture and quantitated by means of their fluorescence and/or absorbance. Fluorescent molecules conjugated to chloramphenicol include derivatives of fluorescein, rhodamine, coumarin, dimethylaminonaphthalene sulfonic acid (dansyl), pyrene, anthracene, nitrobenzoxadiazole (NBD), acridine and dipyrrometheneboron difluoride.
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