Identification and Characterization of Flavonoid Biosynthetic Enzyme Genes in Salvia miltiorrhiza (Lamiaceae).

Identification and Characterization of Flavonoid Biosynthetic Enzyme Genes in Salvia miltiorrhiza (Lamiaceae).
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唇形科丹参黄酮生物合成酶基因的鉴定与表征

DOI:
10.3390/molecules23061467
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发表时间:
2018-06-16
期刊:
Molecules (Basel, Switzerland)
影响因子:
--
通讯作者:
Lu S
Lu S
中科院分区:
其他
文献类型:
--
作者:
Deng Y;Li C;Li H;Lu S

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黄酮类化合物是一类重要的次生代谢产物,具有广泛的药理作用。丹参(Salvia miltiorrhiza Bunge,丹参)是我国著名的传统中草药,含有丰富的黄酮类化合物。然而,目前对S.丹参。通过全基因组预测和分子克隆,共鉴定出26个类黄酮生物合成相关候选基因,其中20个为新基因。它们分属于9个家族,分别编码查尔酮合成酶(CHS)、查尔酮异构酶(CHI)、黄酮合成酶(FNS)、黄烷酮3-羟化酶(F3 H)、黄酮3′-羟化酶(F3′H)、黄酮3′,5 ′-羟化酶(F3′5′H)、黄酮醇合成酶(FLS)、二氢黄酮醇4-还原酶(DFR)和花青素合成酶(ANS)。内含子/外显子结构、推导蛋白特征及系统发育关系分析揭示了S.丹参类黄酮生物合成相关蛋白及其同源物。这些基因表现出组织特异性表达模式,并对MeJA治疗有不同的反应。通过全面系统的分析,确定了14个最可能编码类黄酮生物合成酶的基因。研究结果为深入了解药用植物中黄酮类化合物的生物合成途径提供了有价值的信息。
Flavonoids are a class of important secondary metabolites with a broad spectrum of pharmacological functions. Salvia miltiorrhiza Bunge (Danshen) is a well-known traditional Chinese medicinal herb with a broad diversity of flavonoids. However, flavonoid biosynthetic enzyme genes have not been systematically and comprehensively analyzed in S. miltiorrhiza. Through genome-wide prediction and molecular cloning, twenty six flavonoid biosynthesis-related gene candidates were identified, of which twenty are novel. They belong to nine families potentially encoding chalcone synthase (CHS), chalcone isomerase (CHI), flavone synthase (FNS), flavanone 3-hydroxylase (F3H), flavonoid 3′-hydroxylase (F3′H), flavonoid 3′,5′-hydroxylase (F3′5′H), flavonol synthase (FLS), dihydroflavonol 4-reductase (DFR), and anthocyanidin synthase (ANS), respectively. Analysis of intron/exon structures, features of deduced proteins and phylogenetic relationships revealed the conservation and divergence of S. miltiorrhiza flavonoid biosynthesis-related proteins and their homologs from other plant species. These genes showed tissue-specific expression patterns and differentially responded to MeJA treatment. Through comprehensive and systematic analysis, fourteen genes most likely to encode flavonoid biosynthetic enzymes were identified. The results provide valuable information for understanding the biosynthetic pathway of flavonoids in medicinal plants.
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