2007/10/15 by Kristen M. Kwan, E. Fujimoto, Esther Fujimoto +9 · 11 citations
Biochemistry, Genetics and Molecular Biology · #Advanced Fluorescence Microscopy Techniques #CRISPR and Genetic Engineering #Zebrafish Biomedical Research Applications
paper · doi:10.1002/dvdy.21343
openalex publication_date 2007/10/15 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/31
Transgenesis is an important tool for assessing gene function. In zebrafish, transgenesis has suffered from three problems: the labor of building complex expression constructs using conventional subcloning; low transgenesis efficiency, leading to mosaicism in transient transgenics and infrequent germline incorporation; and difficulty in identifying germline integrations unless using a fluorescent marker transgene. The Tol2kit system uses site-specific recombination-based cloning (multisite Gateway technology) to allow quick, modular assembly of [promoter]-[coding sequence]-[3' tag] constructs in a Tol2 transposon backbone. It includes a destination vector with a cmlc2:EGFP (enhanced green fluorescent protein) transgenesis marker and a variety of widely useful entry clones, including hsp70 and beta-actin promoters; cytoplasmic, nuclear, and membrane-localized fluorescent proteins; and internal ribosome entry sequence-driven EGFP cassettes for bicistronic expression. The Tol2kit greatly facilitates zebrafish transgenesis, simplifies the sharing of clones, and enables large-scale projects testing the functions of libraries of regulatory or coding sequences.