Molecular screening and cloning of the Protease encoded gene from Streptomyces strains isolated from Persian Gulf
Publish Year: 1399
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IJMCM-10-1_002
تاریخ نمایه سازی: 18 اسفند 1402
Abstract:
Protease is an enzyme with various uses in medicine, industry and textile. One of the most important sources of protease production is bacteria such as Streptomyces. So, the aim of this study was cloning and sequencing of the protease gene in the Streptomyces spp isolated from Persian Gulf in Escherichia coli XL۱blue. After collection of marine sediments from the Persian Gul, Streptomyces strains were identified using standard laboratory tests. All isolates were confirmed using ۱۶S rRNA amplification test. Protease encoded gene were identified using specific primers in the PCR method. Protease gene was cloned in the E. coli host vector by TA cloning technique and finally the expression of the genes was measured using Real-time PCR method. ClustalX and Mega۵ software were used to draw the phylogenetic tree. Twelve isolates of Streptomyces were isolated and ۲۵% (n; ۳/۱۲) of them were positive for protease gene. After cloning of the gene, colony selection (blue / white colonies) were used for identification of success cloned strains. A relative expression of the protease gene was shown by real-time PCR test. Phylogenetic tree with the neighbor joining method show that, Streptomyces spp with bootstrap values ۹۹% located in a clade which indicated their close relatedness. Protease enzyme production was performed by recombinant plasmid and TA cloning, and further studies could be helpful to optimize different conditions for this enzyme production. So, The Persian Gulf is a large pool for the protease producing Streptomyces for medical and industrial use.
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Authors
Farnaz Heydari
East Tehran Branch, Islamic Azad University, Tehran, Iran
Elahe Aliasgari
East Tehran Branch, Islamic Azad University, Tehran, Iran
Kumarss Amini
Department of Microbiology, School of Basic Sciences, Saveh Branch, Islamic Azad University, Saveh, Iran