1.17.99.9: heme a synthase
This is an abbreviated version!
For detailed information about heme a synthase, go to the full flat file.
Reaction
Synonyms
ape1694, cCtaA, COX15, COX15p, ctaA, CtaA protein, HAS, TcCox15
ECTree
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General Information
General Information on EC 1.17.99.9 - heme a synthase
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malfunction
metabolism
physiological function
cox15 mutants are blocked in heme A but not heme O biosynthesis
malfunction
overexpression of a non-functional mutant causes a reduction in heme A content. This hindrance in the heme A synthesis provokes a reduction on CcO activity and, in consequence, an impairment on Trypanosoma cruzi survival, proliferation and infectivity
malfunction
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overexpression of a non-functional mutant causes a reduction in heme A content. This hindrance in the heme A synthesis provokes a reduction on CcO activity and, in consequence, an impairment on Trypanosoma cruzi survival, proliferation and infectivity
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heme O hydroxylation, catalyzed by Cox15p is an important regulatory step
metabolism
the enzyme is involved in biosynthesis of heme A, an obligatory cofactor in eukaryotic cytochrome c oxidase. The enzyme catalyses the conversion of heme o to heme a by two successive hydroxylations of the methyl group at C-8, using water as the oxygen source. The first hydroxylation forms heme i, the second hydroxylation results in an unstable dihydroxymethyl group, which spontaneously dehydrates, resulting in the formyl group of heme a
metabolism
the enzyme is required for heme A biosynthesis
metabolism
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the enzyme is involved in biosynthesis of heme A, an obligatory cofactor in eukaryotic cytochrome c oxidase. The enzyme catalyses the conversion of heme o to heme a by two successive hydroxylations of the methyl group at C-8, using water as the oxygen source. The first hydroxylation forms heme i, the second hydroxylation results in an unstable dihydroxymethyl group, which spontaneously dehydrates, resulting in the formyl group of heme a
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the COX15 protein is essential for the assembly of yeast cytochrome oxidase
physiological function
the enzyme is required for starvation survival, recovery, and cytochrome biosynthesis
physiological function
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the enzyme is required for starvation survival, recovery, and cytochrome biosynthesis
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