論文 - 詳細
| RRC ID | 81559 |
|---|---|
| 著者 | Ryota Akiyama, Bunta Watanabe, Junpei Kato, Masaru Nakayasu, Hyoung Jae Lee, Naoyuki Umemoto, Toshiya Muranaka, Kazuki Saito, Yukihiro Sugimoto, Masaharu Mizutani |
| タイトル | Tandem Gene Duplication of Dioxygenases Drives the Structural Diversity of Steroidal Glycoalkaloids in the Tomato Clade |
| ジャーナル | Plant And Cell Physiology |
| Abstract |
Cultivated tomato (Solanum lycopersicum) contains α-tomatine, a steroidal glycoalkaloid (SGA), which functions as a defense compound to protect against pathogens and herbivores; interestingly, wild species in the tomato clade biosynthesize a variety of SGAs. In cultivated tomato, the metabolic detoxification of α-tomatine during tomato fruit ripening is an important trait that aided in its domestication, and two distinct 2-oxoglutarate-dependent dioxygenases (DOXs), a C-23 hydroxylase of α-tomatine (Sl23DOX) and a C-27 hydroxylase of lycoperoside C (Sl27DOX), are key to this process. There are tandemly duplicated DOX genes on tomato chromosome 1, with high levels of similarity to Sl23DOX. While these DOX genes are rarely expressed in cultivated tomato tissues, the recombinant enzymes of Solyc01g006580 and Solyc01g006610 metabolized α-tomatine to habrochaitoside A and (20R)-20-hydroxytomatine and were therefore named as habrochaitoside A synthase (HAS) and α-tomatine 20-hydroxylase (20DOX), respectively. Furthermore, 20DOX and HAS exist in the genome of wild tomato S. habrochaites accession LA1777, which accumulates habrochaitoside A in its fruits, and their expression patterns were in agreement with the SGA profiles in LA1777. These results indicate that the functional divergence of α-tomatine-metabolizing DOX enzymes results from gene duplication and the neofunctionalization of catalytic activity and gene expression, and this contributes to the structural diversity of SGAs in the tomato clade. |
| 巻・号 | 63 |
| ページ | 981-990 |
| 公開日 | 2022-7-14 |
| DOI | 10.1093/pcp/pcac064 |
| PMID | 35560060 |
| MeSH | Dioxygenases* / metabolism Fruit / genetics Fruit / metabolism Gene Duplication Mixed Function Oxygenases / genetics Solanum lycopersicum* / genetics Solanum lycopersicum* / metabolism |
| IF | 4.062 |
| オルトメトリクス指標 |
オルトメトリクス指標項目
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| 最多言及媒体 | X(Twitter) |
| 各媒体での言及数の合計 | 11 |
| 過去6か月間でのオルトメトリクス指標の変動値 | 0.0 |
| リソース情報 | |
| トマト | TOMJPF00014 TOMJPF00001 |