SgRNA directing sequence for specific targeting of human ABCG2 gene and application thereof

The invention discloses an sgRNA directing sequence for specific targeting of a human ABCG2 gene and an application thereof, and belongs to the field of gene engineering application. The sgRNA directing sequence has a nucleotide sequence of GCTGCAAGGAAAGATCCAAG. According to the sgRNA directing sequence, two single-stranded oligo sequences are designed and synthesized and then are annealed to form a double chain, and then the double chain is connected with a Cas9 vector; with use of the Cas9 vector, sgRNA and a CRISPR system are introduced into target cells, a Cas9 protein can find out a DNA sequence matched with the Cas9 protein under guidance of the sgRNA, shearing is performed, and the ABCG2 gene is knocked out. According to the sgRNA directing sequence provided by the invention, the ABCG2 gene is knocked out or edited by the CRISPR-Cas9 system, then the expression of the ABCG2 is inhibited or eliminated, and the problem of multi-drug resistance generated in treatment of tumor can be effectively solved.