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Isolation of Metallothionein (MT) Gene from Phytoremediation Agent, Eleusine indica

M Mardalisa, U M Batubara
Published: 1 November 2021
Abstract: Belulang grass (Eleusine indica) is a plant in the Poaceae family that is commonly found in the coastal area of Dumai, Riau Province. Eleusine indica is characterized by narrow leaves, concave stems that can reach up to 95 cm high and strong roots. E. indica is known to be very tolerant of its environment, including the environment contaminated with heavy metals. The ability of E. indica as a phytoremediation agent in absorbing heavy metals has been widely known as the role of metallothionein (MT) protein. MT is believed to have a function in the metal metabolism and detoxification process through the metal chelating interaction between the cysteine amino acid residues. This unique function prompted the interest to isolate the MT gene from E. indica. This method involves the isolation of genomic DNA from E. indica followed by the process of amplification of the MT gene using specific primers, namely MTFS and MTRS by polymerase chain reaction (PCR) technology. The success of the MT gene isolation process from E. indica was evidenced by the presence of a single band size of around 172 bp via the visualization process on 1% agarose gel. Furthermore, the results of the PCR product are purified for the purpose of sequencing activity. The results of sequencing analysis of the 172 bp fragment showed 99.31% identical similarity with the complete metallothionein gene from E. indica (DQ082855.1) by using the BLASTN tool, NCBI website.
Keywords: isolation / indica / function / contaminated / PCR / heavy / Eleusine / tolerant

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