ArticleCell structure and function2023
Enhancement of Vivid-based photo-activatable Gal4 transcription factor in mammalian cells.
Article in Cell structure and function, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 3 citations in OpenAlex.
- An ultralow-background far-red light-responsive optogenetic tool based on an engineered biliverdin-binding domain.Nature methods · 2026Article
- Application of Lentivirus Vectors to Adult Neurogenesis and Manipulation of Neural Stem Cells.Methods in molecular biology (Clifton, N.J.) · 2026Article
- How fungi see the world: fungal photoreceptors and their role in the regulation of fungal biology.Microbiology and molecular biology reviews : MMBR · 2025Review
- Optical Approaches for Investigating Neuromodulation and G Protein-Coupled Receptor Signaling.Pharmacological reviews · 2023Review
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7 authors at 1 institution in 1 country.
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Abstract
The Gal4/UAS system is a versatile tool to manipulate exogenous gene expression of cells spatially and temporally in many model organisms. Many variations of light-controllable Gal4/UAS system are now available, following the development of photo-activatable (PA) molecular switches and integration of these tools. However, many PA-Gal4 transcription factors have undesired background transcription activities even in dark conditions, and this severely attenuates reliable light-controlled gene expression. Therefore, it is important to develop reliable PA-Gal4 transcription factors with robust light-induced gene expression and limited background activity. By optimization of synthetic PA-Gal4 transcription factors, we have validated configurations of Gal4 DNA biding domain, transcription activation domain and blue light-dependent dimer formation molecule Vivid (VVD), and applied types of transcription activation domains to develop a new PA-Gal4 transcription factor we have named eGAV (enhanced Gal4-VVD transcription factor). Background activity of eGAV in dark conditions was significantly lower than that of hGAVPO, a commonly used PA-Gal4 transcription factor, and maximum light-induced gene expression levels were also improved. Light-controlled gene expression was verified in cultured HEK293T cells with plasmid-transient transfections, and in mouse EpH4 cells with lentivirus vector-mediated transduction. Furthermore, light-controlled eGAV-mediated transcription was confirmed in transfected neural stem cells and progenitors in developing and adult mouse brain and chick spinal cord, and in adult mouse hepatocytes, demonstrating that eGAV can be applied to a wide range of experimental systems and model organisms.Key words: optogenetics, Gal4/UAS system, transcription, gene expression, Vivid.
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