Luciferase Reporter Cell Line - HeLa

Transcription is regulated by a variety of mechanisms, primarily by the recruitment of RNA polymerase complexes to the promoter region of DNA by transcription factors. Researchers have found that even transcription activator-like effectors (TALEs), which lack an activation structural domain, can enhance transcription in mammalian cells through adjacent binding to multiple different dimeric or monomeric transcription factors without the need for direct interaction. Studies have shown that TALE can function over distances of tens of nucleotides and enhance KRAB-mediated transcriptional repression. This regulatory mechanism is characteristic of TALE and, unlike the dCas9/gRNA, zinc finger, or Gal4 DNA-binding domains, may involve a deformational effect on DNA structure or dynamics. This mechanism not only regulates transcription but may also play a role in the natural function of TALE.

Figure 1. The researchers analyzed the transcriptional activation of TALE in different cell lines using luciferase reporter assays. Co-transfection of TALE-encoding plasmid (25 ng) significantly increased luciferase activity in the HeLa cell line. This result suggests that TALE effectively enhances transcriptional activation and exhibits significant transcriptional regulation in HeLa cell lines. (Leben K, et al., 2022)