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    Biochem Biophys Res Commun. 1991 Jul 31;178(2):679-85.

    A metabolite of halothane covalently binds to an endoplasmic reticulum protein that is highly homologous to phosphatidylinositol-specific phospholipase C-alpha but has no activity.

    Source

    Laboratory of Chemical Pharmacology, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland 20892.

    Abstract

    When the inhalation anesthetic halothane was administered to rats, a 58 kDa protein in the liver became covalently labeled by the trifluoroacetyl chloride metabolite of halothane. The amino acid sequences of the N-terminal and of several internal peptide fragments of the protein were 99% homologous to that of the deduced amino acid sequence of a cDNA reported to correspond to phosphatidylinositol-specific phospholipase C-alpha. The purified trifluoroacetylated 58 kDa protein or native 58 kDa protein, however, did not have phosphatidylinositol-specific phospholipase C activity. We conclude that the reported cDNA of phosphatidylinositol-specific phospholipase C-alpha may encode for a microsomal protein of unknown function.

    PMID:
    1650195
    [PubMed - indexed for MEDLINE]

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