A NESTED-SPLICING BY OVERLAP EXTENSION PCR IMPROVES SPECIFICITY OF THIS STANDARD METHOD

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KARKHANEH ALI ASGHAR; YAKHCHALI BAGHER; RASTGAR JAZII FERDOUS; BAMBAEE BIJAN; AMINZADEH SAEED; RAHIMI FATEMEH

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Journal: Iranian Journal of Biotechnology Year:2015 | Volume:13 | Issue:2 Page(s): 56-59

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Title

A NESTED-SPLICING BY OVERLAP EXTENSION PCR IMPROVES SPECIFICITY OF THIS STANDARD METHOD

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Keywords

NESTED-SPLICING BY OVERLAP EXTENSION PCR

POLYMERASE CHAIN REACTION

SITE-DIRECTED MUTAGENESIS

Abstract

Background: Splicing by overlap extension (SOE) PCR is used to create mutation in the coding sequence of an enzyme in order to study the role of specific residues in protein’s structure and function.Objectives: We introduced a nested-SOE-PCR (N –SOE-PCR) in order to increase the specificity and generating mutations in a gene by SOE-PCR.Materials and Methods: Genomic DNA from Bacillus thermocatenulatus was extracted. Nested PCR was used to amplify B. thermocatenulatus lipase gene variants, namely wild type and mutant, using gene specific and mutagenic specific primers, followed by cloning in a suitable vector. Briefly in N-SOE-PCR method, instead of two pairs of primers, three pairs of primers are used to amplify a mutagenic fragment. Moreover, the first and second PCR products are slightly longer than PCR products in a conventional SOE. PCR products obtained from the first round of PCR are used for the second PCR by applying the nested and mutated primers. Following to the purification of the amplified fragments, they will be subject of the further purification and will be used as template to perform the third round of PCR using gene specific primers. In the end, the products will be cloned into a suitable vector for subsequent application.Results: In comparison to the conventional SOE-PCR, the improved method (i.e. N-SOE-PCR) increases the yield and specificity of the products. In addition, the proposed method shows a large reduction in the non-specific products.Conclusions: By applying two more primers in the conventional SOE, the specificity of the method will be improved. This would be in part due to annealing of the primers further inside the amplicon that increases both the efficiency and a better attachment of the primers. Positioning of the primer far from both ends of an amplicon leads to an enhanced binding as well as increased affinity in the third round of amplification in SOE.

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APA: Copy

KARKHANEH, ALI ASGHAR, YAKHCHALI, BAGHER, RASTGAR JAZII, FERDOUS, BAMBAEE, BIJAN, AMINZADEH, SAEED, & RAHIMI, FATEMEH. (2015). A NESTED-SPLICING BY OVERLAP EXTENSION PCR IMPROVES SPECIFICITY OF THIS STANDARD METHOD. IRANIAN JOURNAL OF BIOTECHNOLOGY, 13(2), 56-59. SID. https://sid.ir/paper/693372/en

Vancouver: Copy

KARKHANEH ALI ASGHAR, YAKHCHALI BAGHER, RASTGAR JAZII FERDOUS, BAMBAEE BIJAN, AMINZADEH SAEED, RAHIMI FATEMEH. A NESTED-SPLICING BY OVERLAP EXTENSION PCR IMPROVES SPECIFICITY OF THIS STANDARD METHOD. IRANIAN JOURNAL OF BIOTECHNOLOGY[Internet]. 2015;13(2):56-59. Available from: https://sid.ir/paper/693372/en

IEEE: Copy

ALI ASGHAR KARKHANEH, BAGHER YAKHCHALI, FERDOUS RASTGAR JAZII, BIJAN BAMBAEE, SAEED AMINZADEH, and FATEMEH RAHIMI, “A NESTED-SPLICING BY OVERLAP EXTENSION PCR IMPROVES SPECIFICITY OF THIS STANDARD METHOD,” IRANIAN JOURNAL OF BIOTECHNOLOGY, vol. 13, no. 2, pp. 56–59, 2015, [Online]. Available: https://sid.ir/paper/693372/en

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