期刊
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卷 16, 期 20, 页码 5382-5385出版社
AMER CHEMICAL SOC
DOI: 10.1021/ol502596z
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资金
- NSF [CHE-1309148]
- NIH [GM093903]
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [1309148] Funding Source: National Science Foundation
Ergothioneine is a histidine thiol derivative. Its mycobacterial biosynthetic pathway has five steps (EgtA-E catalysis) with two novel reactions: a mononuclear nonheme iron enzyme (EgtB) catalyzed oxidative C-S bond formation and a PLP-mediated C-S lyase (EgtE) reaction. Our bioinformatic and biochemical analyses indicate that the fungus Neurospora crassa has a more concise ergothioneine biosynthetic pathway because its nonheme iron enzyme, Egt1, makes use of cysteine instead of gamma-Glu-Cys as the substrate. Such a change of substrate preference eliminates the competition between ergothioneine and glutathione biosyntheses. In addition, we have identified the N. crassa C-S lyase (NCU11365) and reconstituted its activity in vitro, which makes the future ergothioneine production through metabolic engineering feasible.
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