Saito AC, Higashi T, Chiba H. Protocol for establishing knockout cell clones by deletion of a large gene fragment using CRISPR-Cas9 with multiple guide RNAs.
STAR Protoc 2024;
5:103179. [PMID:
38972040 PMCID:
PMC11264176 DOI:
10.1016/j.xpro.2024.103179]
[Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2024] [Revised: 05/22/2024] [Accepted: 06/17/2024] [Indexed: 07/09/2024] Open
Abstract
Genome editing is a powerful tool for establishing gene knockout or mutant cell lines. Here, we present a protocol for establishing knockout cell clones by deletion of large gene fragments using CRISPR-Cas9 with multiple guide RNAs. We describe steps for designing guide RNAs, cloning them into CRISPR-Cas9 vectors, cell seeding, transfection into cultured cells, clonal selection, and screening assays. This protocol can delete gene regions over 100 kbp, including GC-rich domains, and is applicable to various cell lines. For complete details on the use and execution of this protocol, please refer to Saito et al.,1 Saito and Endo et al.,2 and Higashi et al.3.
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