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Updated: May 28, 2025

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LcMYB43通过激活Litsea cubeba中的1-deoxy-D-xylulose-5-phosphate合成酶基因表达来增强单烯生物合成

Feifei Ni¹, Yunxiao Zhao², Ming Gao²

¹State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing 100091, China; Nanjing Forestry University, Nanjing 210037, China; Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou 311400, Zhejiang Province, China.

International journal of biological macromolecules

|February 12, 2025

概括

莱塞亚 MYB转录因子调节了烯生物合成. 该研究确定了激活LcDXS5的LcMYB43,从而增强了该植物的单烯产量.

科学领域:

植物分子生物学植物分子生物学
代谢工程是代谢工程.
基因组学就是基因组学.

背景情况:

MYB转录因子调节植物代谢过程,包括烯生物合成.
豆富含单烯,其生物合成由2-C-甲基-D-氨酸4-酸盐 (MEP) 路由酶DXS.调节.
在L. cubeba的基因生物合成中MYB基因的作用尚不清楚.

研究的目的:

为了对Litsea cubeba中的R2R3-MYB基因家族进行全基因组的表征.
研究L. cubeba R2R3-MYB基因的遗传关系,表达模式和调节作用.
阐明特定MYB成员在单烯生物合成中的功能.

主要方法:

在L. cubeba.中对R2R3-MYB基因进行全基因组识别和遗传学分析.
使用定量PCR进行基因表达分析.
功能测定包括酵母单杂交 (Y1H),电泳运动转移测定 (EMSA) 和双露西法酶记者测定.
在L. cubeba.中进行过度表达研究.

主要成果:

在L. cubeba中鉴定了129个R2R3-MYB成员,有证据表明基因家族通过串联和细分重复扩张.
发现LcMYB43激活了LcDXS5的表达,LcDXS5是单烯生物合成中的关键酶.
过度表达LcMYB43导致单烯积累的显著增加.
LcMYB43直接与LCDXS5促进体中的CAACAG基因结合,证实了转录激活.

结论:

在Litsea cubeba中,LCMYB43在增强单烯生物合成方面发挥着至关重要的作用.
该机制涉及LCMYB43.3通过LCMYB43.5直接转录激活LcDXS5.
这项研究为L. cubeba的单二烯生物合成的调节网络提供了新的见解,强调了MYB-DXS相互作用的重要性.

关键词:

DXS 是一个DXS.这就是MYB.单二烯生物合成

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