Superoxide-mediated O2 activation drives radical cyclization in ergot alkaloid biosynthesis
Conventional heme enzymes utilize iron–oxygen intermediates to activate substrates and drive reactions. Recently, Chen et al. discovered a novel NADPH-independent superoxide mechanism of heme catalase EasC, which facilitates an O2-dependent radical oxidative cyclization reaction during ergot alkaloi...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-06-01
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| Series: | Engineering Microbiology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2667370325000219 |
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| Summary: | Conventional heme enzymes utilize iron–oxygen intermediates to activate substrates and drive reactions. Recently, Chen et al. discovered a novel NADPH-independent superoxide mechanism of heme catalase EasC, which facilitates an O2-dependent radical oxidative cyclization reaction during ergot alkaloid biosynthesis. This enzyme coordinates superoxide-mediated catalysis by connecting spatially distinct NADPH-binding pocket and heme pocket via a slender tunnel, offering a novel perspective on the catalytic mechanisms of heme enzymes in nature. |
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| ISSN: | 2667-3703 |