Revision as of 19:49, 14 September 2024

MREdada-EGFP

Usage and Biology

The MRE-sites containing promoter enables the metal-dependent expression of a downstream positioned reporter gene via the metal ion-dependent transcription factor MTF-1 for cell-based metal detection.

In order to integrate the findings of Searle and colleagues (1985) and Wang and colleagues (2004) regarding the metal inducibility of a promoter with two MREa sites and a high affinity between MREd and MTF-1, we designed a synthetic promoter with two MREa and two MREd sites that alternate. The aim is to enhance the sensitivity and efficiency of the metal-dependent promoter.

Cloning

Theoretical Part Design

Placing the MRE containing promoter upstream of the reporter gene EGFP allows the visualization of primarily metal-dependent activation of MTF-1.

Sequence and Features

Cloning

To test the MREdada promoter functionality the reporter gene EGFP (K3338006) was cloned downstream of the promoter by inserting the MREdada promoter into the AseI- and NheI-digested EGFP-C2 backbone (K3338020) using NEB Hifi Assembly.

Table1: Primers used to create matching overhangs on promoter amplicon to digested pEGFP-C2 backbone

The vector map of the assembled construct is shown in figure 1.

Reference

Searle, P. F., Stuart, G. W., & Palmiter, R. D. (1985). Building a metal-responsive promoter with synthetic regulatory elements. Molecular and cellular biology, 5(6), 1480–1489. https://doi.org/10.1128/mcb.5.6.1480-1489.1985

Wang, Y., Lorenzi, I., Georgiev, O., & Schaffner, W. (2004). Metal-responsive transcription factor-1 (MTF-1) selects different types of metal response elements at low vs. high zinc concentration. Biological chemistry, 385(7), 623–632. https://doi.org/10.1515/BC.2004.077