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两种咖啡因-协酶3a-o-甲基转移酶的功能分析,涉及梨树木素代谢中的二甲基转移酶

Guohui Li¹, Muhammad Aamir Manzoor², Xiang Ren³

¹Anhui Provincial Key Laboratory for Quality Evaluation and Improvement of Traditional Chinese Medicine, College of Biological and Pharmaceutical Engineering, West Anhui University, Lu'an 237012, China.

|August 1, 2024

概括

咖啡因共酶AO-甲基转移酶 (CCoAOMT) 基因对于植物中的素合成至关重要. 这项研究确定了九个梨CCoAOMT基因,其中PbCCoAOMT1/2过度表达增加了素含量,并提供了对石细胞发育的见解.

科学领域:

植物生物学植物生物学
生物化学生物化学
分子遗传学分子遗传学

背景情况:

素合成对于植物的结构完整性和防御是至关重要的.
咖啡因共酶AO-甲基转移酶 (CCoAOMT) 是素生物合成途径中的一个关键酶.
了解CCoAOMT基因在水果发育中的功能,就像在梨中一样,对于农业应用很重要.

研究的目的:

在梨 (Pyrus bretschneideri) 中识别和描述CCoAOMT基因.
研究特定的PbCCoAOMT基因在素生物合成和梨果中的石细胞发育中的作用.
探索涉及转录因子和PbCCoAOMT基因的调控机制.

主要方法:

9个PbCCoAOMT基因的识别和分类.
激素治疗 (ABA,MeJA,SA) 和使用qRT-PCR的基因表达分析.
在阿拉比多普西斯和梨果中过度表达PbCCoAOMT1/2.
复合蛋白质的体外酶活性测定.
酵母单杂交 (Y1H) 和双化酶 (双-LUC) 试验用于研究基因调节.

主要成果:

发现并对9个PbCCoAOMT基因进行了分类.
在激素治疗后观察到PbCCoAOMT基因的差异表达.
过度表达PbCCoAOMT1和PbCCoAOMT2显著增加了转基因植物中的红素含量.
确定PbMYB25是一种转录因子,它与PbCCoAOMT1.1.的促进物结合.
复合PbCCoAOMT1/2蛋白在体外表现出酶活性.

结论:

PbCCoAOMT1和PbCCoAOMT2是梨果中的素生物合成的重要贡献者.
这些基因在石细胞发育中起作用.
PbMYB25充当PbCCoAOMT1表达的积极调节者,表明对素合成的调节网络.

关键词:

这种基因是CCoAOMT基因.表达式分析表达式分析在Lignin的基础上.梨子果实梨子果实梨子果实规则规则规则规则规则规则

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