洞察2,3-氧化二二烯循环酶在B,C环开放的三二烯生物合成中的新功能化 昆
Qian Zhou1, Peng Sun1, Hao-Ming Xiong2
1Key Laboratory of Molecular Design for Plant Cell Factory of Guangdong Higher Education Institutes, SUSTech-PKU Institute of Plant and Food Science, Department of Biology, School of Life Sciences, Southern University of Science and Technology, Shenzhen, Guangdong, 518055, China.
The New phytologist
|October 31, 2023
概括
研究人员在菜中发现了一种新型酶,氧化合成酶 (CqQS),可以产生罕见的B,C环开放的三烯. 这一发现揭示了新的植物生物合成途径和昆特征工程的潜力.
科学领域:
- 植物生物化学和分子生物学
- 自然产品的生物合成.
- 酶工程是什么?酶工程是什么?
背景情况:
- 生物活性三烯是复杂的分子,在植物中由2,3-氧化二二烯循环酶 (OSC) 合成.
- 具有B,C环开放骨的三聚很少见,它们的形成机制在很大程度上是未知的.
- 了解这些罕见的三烯对于探索新化学和生物学的研究至关重要.
研究的目的:
- 为了识别和表征涉及B,C环开放的B,C环三烯生物合成的新型OSCs在陈诺帕 (Chenopodium quinoa).
- 为了阐明这些独特的三烯骨架形成的分子机制.
- 探索这些发现在昆特征工程和质量改进方面的潜在应用.
主要方法:
- 基因组挖掘Chenopodium昆,以确定候选的OSC基因.
- 通过酶测定确定OSC的功能性特征.
- 蛋白质结构分析和位点定向突变发生,以了解酶机制.
- 量子计算和对接实验以建模催化过程.
主要成果:
- 在中鉴定出一种应激反应的,新功能化的OSC,氧化合成酶 (CqQS).
- CqQS生产B,C环开放的三烯,包括甲醇A,甲醇B和新型 (-) - 氧化A.
- 关键氨基酸残留物 (N612K) 被确定为五环和B,C环开放的三烯合成之间的功能互转.
- 建议CqQS中的保存残留物 (W613,F413) 稳定B,C环开放的三烯形成的碳酸介质.
结论:
- 在植物中发现了一种新的B,C环开放的三烯生物合成途径,由CqQS介导.
- 在植物物种中证明了B,C环开放的三烯形成的保存机制.
- 开辟了进入这些化合物的独特化学和生物学的途径.
- 为昆特征工程和提高作物质量提供了基础.
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