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Identification and characterization of Metal Tolerance Protein (MTP) family in Glycyrrhiza uralensis

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Abstract

Heavy metals (HMs) are among the most common environmental problems on a global scale and adversely affect plant growth and productivity. Several plants, including licorice, can carry out the phytoremediation process of HMs using a variety of protein families, including the Metal Tolerance Protein or MTP family. In the present study, 13 genes were recognized as MTP family members which had cation efflux domain. All of these proteins had transmembrane domains which were localized in a vacuole and divided phylogenetically into three sub-families (Zn-MTP, Mn-MTP, and Fe/Zn-MTP) and seven groups. GuMTPs exhibited similar gene structures inside the same sub-family, which was very evident for the Zn-MTP sub-family. The recognized simple sequence repeat (SSR) marker could be helpful in the marker selection associated programs. Analysis of gene-targeted miRNA and gene expression in different tissues and stress conditions found that the evaluated genes have a crucial role in plant development and respond to various stimuli. The expression of GuMTP9.2 and GuMTP8.1 increased under salinity stress due to their similar activation process thus it’s possible to up-regulation in response to HMs. Three-dimensional structures of this family identify the ligand-protein interactions through docking, which indicates this protein’s potential in the diffusion of HMs.

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Abbreviations

CDF:

Cation Diffusion Facilitator

CBI:

Codon Bias Index

ENC:

Effective Number of Codon

GC3:

GC content at the third site position

HMs:

Heavy Metals

JA :

Jasmonic Acid

KDD:

Knowledge Discovery from Data

MTP:

Metal Tolerance Protein

MeJA:

Methyl Jasmonate

OS :

OxidativeStress

ROS:

Reactive Oxygen Species

RSCU:

Relative Synonymous Codon Usage

SChi2:

Scaled Chi-square

SSR:

Simple Sequence Repeat

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Contributions

Z.SH conceived, designed, and performed the methodology. M.N.CH analyzes the SRA data, Z.SH and S.S write the manuscript. All authors read and approved the manuscript.

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Correspondence to Zahra Shirazi.

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The authors declare no conflict of interest.

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Shirazi, Z., Samavat, S., Nezamivand Chegini, M. et al. Identification and characterization of Metal Tolerance Protein (MTP) family in Glycyrrhiza uralensis. Biologia 76, 3221–3233 (2021). https://doi.org/10.1007/s11756-021-00880-0

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  • DOI: https://doi.org/10.1007/s11756-021-00880-0

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