Revision as of 19:33, 21 October 2019

Minimum TATA-box promoter

The minimum TATA promoter is a eukaryotic DNA sequence that indicates a transcription start site. The minimum TATA promoter shows low levels of transcription at baseline. Sequence and Features

Improvement: NUDT_CHINA 2019

Special Design

In order to improve this part, this year we have made a series of modification based on the Minimum TATA-box promoter designed by Daniel Tang of Stanford BIOE44 - S11.(BBa_M50098). Due to the low efficiency of TATA box promoter, we shorten the sequence into only minip. The minip can be considered as a microcosm of TATA promoter, for its function is almost similar to TATA promoter.In addition, we also added glucose-sensing fragment to enhance the part’s initiation strength, as well as glucose-sensing function. Because there is high blood glucose concentration in diabetics, in order to get improved gene which is sensitive to diabetics it’s convenient to employ promoter which reacts to high blood glucose. Transcription factor -- ChREBP -- can be effectively expressed with high blood glucose. Meanwhile, heterodimer which consists of ChREBP and Mlx can combine with gene promoter CHoRE to induce gene transcription. Therefore, we choose CHoRE as promoter of engineered plasmid and connect it with minP to indicates a transcription start site. In addition, we increase the number of CHoRE to realize that engineered gene will be activated by particular high blood glucose concentration instead of normal blood glucose concentration.
The structure diagram of the improved part is as below.

                       Figure 1. The structure diagram of the 9xGSP part.