Isolation, Cloning, Bioinformatics Analysis of Protein Properties and Gene Expression Analysis of Dihydrosanguinarine Oxidase (DBOX) from Opium Poppy (Papaveer somniferum L.)

Samiey, Kamran; Ismaili, Ahmad; Nazarian Firoz-abadi, Farhad; Sohrabi, Seyed Mohsen

doi:10.22055/ppd.2020.21559.1463

Document Type : Research Paper

Authors

¹ Ph.D. Student of Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

² Professor, Department of Agronomy and Plant Breeding, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

³ Ph.D. Student of Plant Biotechnology, Faculty of Agriculture, Lorestan University, Khorramabad, Iran

https://doi.org/10.22055/ppd.2020.21559.1463

Abstract

Abstract

Background and Objectives
Opium poppy (Paoaver somniferum L.) is one of the important medicinal plants considered the only source for several high-value pharmaceutically BIAs. Benzylisoquinoline alkaloieds (BIAs) are a very large and complex group of plant alkaloids. Today’s various methods of genetic engineering are applied to improve the biosynthetic pathways in medicinal plants. For successful implementation of techniques such as gene silencing and over-expression, it is important to get accurate and complete information about genetic characteristics of related genes in the biosynthesis of secondary metabolites. DBOX is one of the important genes in biosynthesis of sanguinarin and papaverin alkaloids of poppy. According to the cause, the present study was performed on DBOX to explain genetic characteristic and gene expression pattern.

Materials and Methods
Specific primers were designed based on databases, and complete sequences of DBOX gene were amplified using DNA and cDNA as a template, and then were cloned in pTZ57R/T plasmid. After sequencing of cloned fragments, CDD, CELLO and ProtParam tools were used to determine ORFs, domains and the location of protein accumulation. Phylogenetic relationship between the gene in this plant with other plants was determined. Finally, the pattern of gene expression in different tissues was assessed using real time RT-PCR technique and RNA-seq data derived from SRA data bank.

Results
Sequencing results showed the 1614-bp fragment that has 100% identity with the DBOX gene of P. somniferum. The protein encoded by this gene was analyzed by bioinformatics methods. Three domains including FAD binding, Berberine and FAD/FMN-containing dehydrogenase in the protein sequence were identified and the existence of an N-terminal signal peptide was also determined in this protein. The results also showed that the highest concentration of protein was present in the plasma membrane and highest function of this protein was in the extracellular. In order to analyze and determine the expression pattern of DBOX gene in different tissues, 5-gene libraries of RNA-seq data of opium poppy (with ERX651037, ERX651023, ERX651056, ERX651082 and ERX651062 access numbers) derived from NCBI-SRA were analyzed. The numbers of sequences from the alignment between different tissues were compared using the Fisher exact test and Chi-squared 2X2 tests. Results of the gene expression analysis showed that the highest level of gene expression of this gene performed in roots and the lowest level of gene expression occurred in the stems. In addition, results of the real-time RT-PCR experiment were similar to in silico tests and the present results demonstrated that DBOX gene transcript levels in root were significantly more than other plant tissues.

Discussion
Results showed that DBOX gene is an intron less gene. According to existing domains, this gene is a member of a FADOX gene family. Due to the presence of FAD and berberin like domains in protein sequence of this gene, its key function in biosynthesis of BIA alkaloids was confirmed. Different expression patterns of DBOX gene in root confirmed accumulation of high value sanguinarin alkaloid in this tissue.

Keywords

20.1001.1.2588543.1399.43.1.6.1

Main Subjects

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© 2020 by the authors. Licensee SCU, Ahvaz, Iran. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-Non Commercial 4.0 International (CC BY-NC 4.0 license) (http://creativecommons.org/licenses/by-nc/4.0/)

Isolation, Cloning, Bioinformatics Analysis of Protein Properties and Gene Expression Analysis of Dihydrosanguinarine Oxidase (DBOX) from Opium Poppy (Papaveer somniferum L.)

References

References

Jalilian, A., Ismaili, A., Nazarian Firouzabadi, F. and Hosseini, S. Z. (2017). Induction of transgenic hairy roots in medicinal plant poppy (Papaver somniferum L.) by agrobacterium rhizogenes-mediated transformation. Plant Productions, 39(4), 1-14. [In Farsi]

Siahmansour, Sh., Ismaili, A. and Nazarian Firouzabadi, F. (2018). Effect of different elicitor treatments on hairy root of medicinal plant poppies (Papaver somniferum L.). Plant Productions, 41(1), 29-42. [In Farsi]

Volume 43, Issue 1June 2020Pages 67-80

Jalilian, A., Ismaili, A., Nazarian Firouzabadi, F. and Hosseini, S. Z. (2017). Induction of transgenic hairy
roots in medicinal plant poppy (Papaver somniferum L.) by agrobacterium rhizogenes-mediated transformation. Plant Productions, 39(4), 1-14. [In Farsi]

Volume 43, Issue 1
June 2020
Pages 67-80