Identification of a Naturally Occurring Peroxidase-Lipoxygenase Fusion Protein

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Science  26 Sep 1997:
Vol. 277, Issue 5334, pp. 1994-1996
DOI: 10.1126/science.277.5334.1994

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A distant relative of catalase that is specialized for metabolism of a fatty acid hydroperoxide was identified. This heme peroxidase occurs in coral as part of a fusion protein, the other component of which is a lipoxygenase that forms the hydroperoxide substrate. The end product is an unstable epoxide (an allene oxide) that is a potential precursor of prostaglandin-like molecules. These results extend the known chemistry of catalase-like proteins and reveal a distinct type of enzymatic construct involved in the metabolism of polyunsaturated fatty acids.

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