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| Phenolic 3-hydroxylases in land plants: biochemical diversity and molecular evolution | |
| Alber;Annette Veronika | |
| 出版年 | 2016 |
| 英文摘要 | Plants produce a rich variety of natural products to face environmental constraints. Enzymes of the cytochrome P450 CYP98 family are key actors in the production of phenolic bioactive compounds. They hydroxylate phenolic esters for lignin biosynthesis in angiosperms, but also produce various other bioactive phenolics. We characterized CYP98s from a moss, a lycopod, a fern, a conifer, a basal angiosperm, a monocot and from two eudicots. We found that substrate preference of the enzymes has changed during evolution of land plants with typical lignin-related activities only appearing in angiosperms, suggesting that ferns, similar to lycopods, produce lignin through an alternative route. A moss CYP98 knock-out mutant revealed coumaroyl-threonate as CYP98 substrate in vivo and showed a severe phenotype. Multiple CYP98s per species exist only in the angiosperms, where we generally found one isoform presumably involved in the biosynthesis of monolignols, and additional isoforms, resulting from independent duplications, with a broad range of functions in vitro Graduate 2017-08-31 |
| 英文关键词 | Cytochrome P450 Land plant evolution Monolignol CYP98 C3'H Populus trichocarpa Physcomitrella patens Phenolic conjugate Hydroxycinnamic Lignin Coumaroyl-threonate Coumaroyl-shikimate |
| 语种 | 英语 |
| URL | http://hdl.handle.net/1828/7651 |
| 资源类型 | 学位论文 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/250063 |
| 推荐引用方式 GB/T 7714 | Alber;Annette Veronika. Phenolic 3-hydroxylases in land plants: biochemical diversity and molecular evolution[D],2016. |
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