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- W4293359975 endingPage "1003" @default.
- W4293359975 startingPage "985" @default.
- W4293359975 abstract "Abstract Heme (protoheme IX) is an essential cofactor for a large variety of proteins whose functions vary from one electron reactions to binding gases. While not ubiquitous, heme is found in the great majority of known life forms. Unlike most cofactors that are acquired from dietary sources, the vast majority of organisms that utilize heme possess a complete pathway to synthesize the compound. Indeed, dietary heme is most frequently utilized as an iron source and not as a source of heme. In Nature there are now known to exist three pathways to synthesize heme. These are the siroheme dependent (SHD) pathway which is the most ancient, but least common of the three; the coproporphyrin dependent (CPD) pathway which with one known exception is found only in gram positive bacteria; and the protoporphyrin dependent (PPD) pathway which is found in gram negative bacteria and all eukaryotes. All three pathways share a core set of enzymes to convert the first committed intermediate, 5-aminolevulinate (ALA) into uroporphyrinogen III. In the current review all three pathways are reviewed as well as the two known pathways to synthesize ALA. In addition, interesting features of some heme biosynthesis enzymes are discussed as are the regulation and disorders of heme biosynthesis." @default.
- W4293359975 created "2022-08-27" @default.
- W4293359975 creator A5025465166 @default.
- W4293359975 creator A5066534178 @default.
- W4293359975 date "2022-08-29" @default.
- W4293359975 modified "2023-09-27" @default.
- W4293359975 title "A primer on heme biosynthesis" @default.
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