[在Astragalus membranaceus中发现的黄类甘油转移酶AmGT90的功能性特征]
Guo-Qing Peng1, Bing-Yan Xu2, Jian-Ping Huang2
1School of Pharmacy, Chengdu University of Traditional Chinese Medicine Chengdu 611137, China Key Laboratory of Phytochemistry and Natural Medicines, Kunming Institute of Botany,Chinese Academy of Sciences Kunming 650201, China.
概括
研究人员发现了一种新基因,AmGT90,来自Astragalus membranaceus,产生黄类单糖化物和二糖化物. 这一发现增强了对植物生物合成的理解,并为合成糖化物生产提供了潜力.
科学领域:
- 植物生物化学 植物生物化学
- 分子生物学分子生物学
- 合成生物学 合成生物学
背景情况:
- 阿斯特拉加勒斯膜含有黄,主要的生物活性化合物和质量指标.
- 在A.membranaceus中,黄主要是糖化,只有有限的已知酶能产生滴糖化物.
研究的目的:
- 从A. membranaceus. 克隆和表征一种新型的糖转移酶基因.
- 为了研究已识别的酶的基质特异性和糖化能力.
- 探索从黄素中形成的二甲糖化物机制.
主要方法:
- 从A. membranaceus. 中克隆AmGT90基因.
- 遗传学分析以确定酶家族.
- 在体外的酶测试以评估基质特异性和产品形成 (单糖化物和二糖化物).
主要成果:
- AmGT90基因编码的是属于UGT74家族的444氨基酸蛋白.
- AmGT90表现出广泛的基质特异性,可糖化各种类型的黄类.
- 该酶可以产生单糖化物和二糖化物,其中一种拟议的luteolin二糖化机制涉及C4'-OH和C7-OH的识别.
结论:
- 在A. membranaceus中发现了一种新型的糖系转移酶AmGT90,能够产生黄类单糖化物和二糖化物.
- 这一发现加深了对这种物种中黄类糖化物生物合成的理解.
- AmGT90介绍了一种通过合成生物学方法生产甘氨酸的新工具.
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