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Abstract: site-directed mutagenesis (SDM) has been a very important method to probe the function-structure relationship of proteins. In this study, we introduced an easy-to-use, polymerase chain reaction (PCR)-based SDM method for double-stranded plasmid DNA, with a designed restriction site to ensure simple and efficient mutant screening. The DNA sequence to be mutated was first translated into amino acid sequence and then the amino acid sequence was reversely translated into DNA sequence with degenerate codons, resulting in a large number of sequences with silent mutations, which contained various restriction endonuclease (RE) sites. Certain mutated sequence with an appropriate RE site was selected as the target DNA sequence for designing a pair of mutation primers to amplify the full-length plasmid via inverse PCR. The amplified product was 5′-phosphorylated, circularized, and transformed into an Escherichia coli host. The transformants were screened by digesting with the designed RE. This protocol uses only one pair of primers and only one PCR is conducted, without the need for hybridization with hazardous isotope for mutant screening or subcloning step.

[1] An, Y., Ji, J., Wu, W., Lv, A., Huang, R., Wei, Y., 2005. A rapid and efficient method for multiple-site mutagenesis with a modified overlap extension PCR. Appl. Microbiol. Biotechnol., 68(6):774-778.

[2] Chapnik, N., Sherman, H., Froy, O., 2008. A one-tube site-directed mutagenesis method using PCR and primer extension. Anal. Biochem., 372(2):255-257.

[3] Heckman, K.L., Pease, L.R., 2007. Gene splicing and mutagenesis by PCR-driven overlap extension. Nat. Protoc., 2(4):924-932.

[4] Jin, C., Cai, X., Ma, H., Xue, Y., Yao, J., Yao, X., 2007. An efficient site-directed mutagenesis method for ColE1-type ori plasmid. Anal. Biochem., 363(1):151-153.

[5] Li, X., Qiu, Y., Shen, Y., Ding, C., Liu, P., Zhou, J., Ma, Z., 2008. Splicing together different regions of a gene by modified polymerase chain reaction-based site-directed mutagenesis. Anal. Biochem., 373(2):398-400.

[6] Nagy, Z.B., Felfoldi, F., Tamas, L., Puskas, L.G., 2004. A one-tube, two-step polymerase chain reaction-based site-directed mutagenesis method with simple identification of the mutated product. Anal. Biochem., 324(2): 301-303.

[7] Rabhi, I., Guedel, N., Chouk, I., Zerria, K., Barbouche, M.R., Dellagi, K., Fathallah, D.M., 2004. A novel simple and rapid PCR-based site-directed mutagenesis method. Mol. Biotechnol., 26(1):27-34.

[8] Seyfang, A., Jin, J.H., 2004. Multiple site-directed mutagenesis of more than 10 sites simultaneously and in a single round. Anal. Biochem., 324(2):285-291.

[9] Tseng, W.C., Lin, J.W., Wei, T.Y., Fang, T.Y., 2008. A novel megaprimed and ligase-free, PCR-based, site-directed mutagenesis method. Anal. Biochem., 375(2):376-378.

[10] Wei, D., Li, M., Zhang, X., Xing, L., 2004. An improvement of the site-directed mutagenesis method by combination of megaprimer, one-side PCR and DpnI treatment. Anal. Biochem., 331(2):401-403.

[11] Zheng, L., Baumann, U., Reymond, J.L., 2004. An efficient one-step site-directed and site-saturation mutagenesis protocol. Nucleic. Acids Res., 32(14):e115.