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  • Title: An Escherichia coli cyoE gene homologue in thermophilic Bacillus PS3 encodes a thermotolerant heme O synthase.
    Author: Saiki K, Mogi T, Ishizuka M, Anraku Y.
    Journal: FEBS Lett; 1994 Sep 12; 351(3):385-8. PubMed ID: 8082800.
    Abstract:
    The cyoE gene of the Escherichia coli bo-type quinol oxidase operon (cyoABCDE) has been previously shown to encode heme O synthase. To demonstrate a catalytic role of a cyoE homologue (the caaE gene) in the gene cluster for caa3-type cytochrome c oxidase of thermophilic Bacillus PS3, we have carried out genetic complementation analysis using the chimeric operon cyoABCD-caaE and heme O synthase assay using the CaaE-overproduced E. coli membranes. We found that the caaE gene encodes a thermotolerant heme O synthase which provides an intermediate for heme A biosynthesis.
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