CRISPR-Cas9 targeting knockout of human breast cancer cell RASSF2 gene and specific sgRNA of RASSF2 gene
A human breast cancer cell, specific technology, applied in the direction of DNA/RNA fragment, retroRNA virus, genetic engineering, etc., can solve the problems of loss of tumor suppressor function, decreased tumor suppressor function of RASSF2, decreased transcriptional activity of RASSF2, etc.
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[0042] 1. Construction of knockout RASSF2 plasmid using CRISPR / Cas9 technology
[0043] 1.1 sgRNA oligonucleotide chain synthesis
[0044]Using the CRISPR online design tool (http: / / crispr.mit.edu / ) according to the scoring system, design a 20bp sgRNA on exon 2 of RASSF2, and verify that there is no non-specific gene by BLAST. Add CACC to the 5' end of the coding strand template, and add AAAC to the 3' end of the non-coding strand template, which is complementary to the cohesive end formed after digestion with BsmBI, and design a pair of CRISPR oligonucleotide chains, see Table 1, Table 1 RASSF2 targeting position Dot and sgRNA oligonucleotide sequence.
[0045]
[0046] 1.2 Vector construction
[0047] 1.2.1 Use BsmBI to digest 2 μg lentiCRISPRv2 plasmid (purchased from Addgene), 2h, 37°C, the enzyme digestion system is as follows:
[0048]
[0049] 1.2.2 Use the GENRY gel recovery kit to purify the digested plasmid product, and operate according to the instructions....
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