Molecular Cloning and Metabolomic Characterization of the 5-enolpyruvylshikimate-3-phosphate Synthase Gene from Baphicacanthus Cusia

Overview

Journal BMC Plant Biol

Publisher Biomed Central

Specialty Biology

Date 2019 Nov 11

PMID 31706293

Citations 2

Authors

Jian Yu

Yihan Zhang

Shuju Ning

Qi Ye

Hexin Tan

Ruibing Chen

Qitao Bu

Rui Zhang

Peimin Gong

Xiaoli Ma

Lei Zhang

Daozhi Wei

Affiliations

Soon will be listed here.

Abstract

Background: Indigo alkaloids, such as indigo, indirubin and its derivatives, have been identified as effective antiviral compounds in Baphicacanthus cusia. Evidence suggests that the biosynthesis of indigo alkaloids in plants occurs via the shikimate pathway. The enzyme 5-enolpyruvylshikimate-3-phosphate synthase (EPSPS) is involved in plant metabolism; however, its underlying putative mechanism of regulating the production of indigo alkaloids is currently unknown.

Results: One gene encoding EPSPS was isolated from B. cusia. Quantitative real-time PCR analysis revealed that BcEPSPS was expressed at the highest level in the stem and upregulated by methyl jasmonate (MeJA), salicylic acid (SA) and abscisic acid (ABA) treatment. The results of subcellular localization indicated that BcEPSPS is mainly expressed in both the plastids and cytosol, which has not been previously reported. An enzyme assay revealed that the heterogeneously expressed BcEPSPS protein catalysed the generation of 5-enolpyruvyl shikimate-3-phosphate. The overexpression of BcEPSPS in Isatis indigotica hairy roots resulted in the high accumulation of indigo alkaloids, such as indigo, secologanin, indole and isorhamnetin.

Conclusions: The function of BcEPSPS in catalysing the production of EPSP and regulating indigo alkaloid biosynthesis was revealed, which provided a distinct view of plant metabolic engineering. Our findings have practical implications for understanding the effect of BcEPSPS on active compound biosynthesis in B. cusia.

Citing Articles

Molecular cloning and functional characterization of BcTSA in the biosynthesis of indole alkaloids in .

Guo Z, Chen J, Lv Z, Huang Y, Tan H, Zhang L Front Plant Sci. 2023; 14:1174582.

PMID: 37139111 PMC: 10149986. DOI: 10.3389/fpls.2023.1174582.

High-Quality Genome of the Medicinal Plant Provides Insights Into the Biosynthesis of Indole Alkaloids.

Hu Y, Ma D, Ning S, Ye Q, Zhao X, Ding Q Front Plant Sci. 2021; 12:742420.

PMID: 34659312 PMC: 8515051. DOI: 10.3389/fpls.2021.742420.

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