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  • Title: Fatty acid hydroperoxide lyase is a heme protein.
    Author: Shibata Y, Matsui K, Kajiwara T, Hatanaka A.
    Journal: Biochem Biophys Res Commun; 1995 Feb 06; 207(1):438-43. PubMed ID: 7857301.
    Abstract:
    Fatty acid hydroperoxide lyase (HPO lyase) is an enzyme that cleaves hydroperoxides of polyunsaturated fatty acids to form short chain aldehydes and omega-oxoacids. Spectrophotometric analyses of HPO lyase highly purified from green bell pepper fruits indicate that it is a heme protein. The heme species was revealed to be heme b (protoheme IX) from the absorption spectrum of the pyridine hemochromogen. Although the spectrum highly resembles that of a plant cytochrome P450, allene oxide synthase from flaxseed, CO treatment of the enzyme caused no appearance of a peak at 450 nm, which is an essential diagnostic feature of a cytochrome P450. Internal amino acid sequences determined with peptide fragments obtained from the lyase showed no homology with any reported sequences.
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