Part:BBa_K2839000

TALEsp1-Pupsp1 stabilized promoter

Contents:

1. One Short Description
2. Two Biology and Functionality
3. Tree Usage in our Project
4. Four Illegal Sites Removal
5. Five Cloning Strategy
6. Six Results, Characterization
7. Seven Potential Applications
8. Eight References

1.Short description:

This part consists of a TAL Effector (TALEsp1), a TALEsp1-stabilized promoter (pupsp1) and a fluorescent marker (sfGFP). This part was originally designed by Thomas Hale Segall-Shapiro (Shapiro et al) and iGEM Thessaloniki modified it to exclude 2 PstI recognition sites, thus making it RFC[10] compatible .It can be used to achieve stabilised expression of the sfGFP marker, decoupled from gene/plasmid copy number.

2.Biology and Functionality:

Transcription Activator- Like Effectors (TAL Effectors or TALEs) are DNA binding proteins that are naturally expressed by members of the Xanthomonas genus when infecting plants. They contain a central repeat domain which defines their binding to specific promoter sequences in the plant genome, activating transcription and facilitating the bacterial infection.

Because of their modular architecture and their ability to recognise specific promoter sequences, TALEs are widely used in genome editing when precise targeting is required. They can be programmed/designed to tightly bind to target sites operating as transcription factors by either activating or repressing transcription initiation or elongation. and either activate or repress transcription.(1)

• DNA binding proteins
• Modular Architecture
• Precise Binding with negligible off target effects

3.Usage in our Project:

As a chassis for hosting the system’s devices we use DH5a E.coli cells. We utilize the ability of the TAL effectors to bind to specific promoter sequences and act as repressors by preventing the recruitment of the RNA polymerase in order to create a type I incoherent Feedforward Loop (iFFL) network motif that renders the expression of the downstream sequences independent of the plasmid’s copy number. A promoter under this effect is called a Stabilized Promoter. (Γενικό σχήμα TALE repression σε promoter και εικονα με input copy number, outputs: Tale and GOI repression).

Sequence and Features

Assembly Compatibility:

• 10
  COMPATIBLE WITH RFC[10]
• 12
  COMPATIBLE WITH RFC[12]
• 21
  INCOMPATIBLE WITH RFC[21]

  Illegal XhoI site found at 2734
  Illegal XhoI site found at 3677
  
• 23
  COMPATIBLE WITH RFC[23]
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal AgeI site found at 1707
  
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Illegal BsaI site found at 23