Molecular Cloning and Differential Gene Expression Analysis of 1-Deoxy-D-xylulose 5-Phosphate Synthase (DXS) in Andrographis paniculata (Burm. f) Nees.

Molecular Biotechnology
Mote SrinathCharu Chandra Giri

Abstract

Andrographis paniculata 1-deoxy-D-xylulose-5-phosphate synthase (ApDXS) gene (GenBank Accession No MG271749.1) was isolated and cloned from leaves for the first time. Expression of ApDXS gene was carried out in Escherichia coli Rosetta cells. Tissue-specific ApDXS gene expression by quantitative RT-PCR (qRT-PCR) revealed maximum fold expression in the leaves followed by stem and roots. Further, the differential gene expression profile of Jasmonic acid (JA)-elicited in vitro adventitious root cultures showed enhanced ApDXS expression compared to untreated control cultures. A. paniculata 3-hydroxy-3-methylglutaryl-coenzyme A reductase (ApHMGR) gene expression was also studied where it was up-regulated by JA elicitation but showed lower expression compared to ApDXS. The highest expression of both genes was found at 25 µm JA elicitation followed by 50 µm. HPLC data indicated that the transcription levels were correlated with increased andrographolide accumulation. The peak level of andrographolide accumulation was recorded at 25 μM JA (9.38-fold) followed by 50 µM JA (7.58-fold) in elicitation treatments. The in silico generated ApDXS 3D model revealed 98% expected amino acid residues in the favored and 2% in the allowed regions of...Continue Reading

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Citations

Sep 28, 2021·Applied Microbiology and Biotechnology·Hosakatte Niranjana Murthy, Dayanand Dalawai

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Datasets Mentioned

BETA
MG271750.1

Methods Mentioned

BETA
PCR

Software Mentioned

RAMPAGE
ESpript
Oligo Analyzer
Structure Analysis and Verification Server (
Marvin View
BLASTp
Errat
Marvin
Molegro Virtual Docker ( MVD )
Marvin space

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