Part:BBa_K782015
12x[NicTAL] operator_CMV promoter_mCitrine
Introduction
Transcription activation like (TAL) effectors are proteins able to specifically bind desired DNA sequence. The central domain of the protein is constructed from variable number of tandem repeats differing only in two amino acids. The 12th and the 13th amino acid are called a “repeat variable diresidue” (RVD) and are responsible for specific interactions with the corresponding base pair (Scholze and Boch, 2011). This modularity of TAL effector binding domains therefore makes them a perfect tool to target specific DNA sequences.
Our construct contain twelve specific binding sites for TALD upstream of CMV promoter. Downstream of CMV promoter we cloned yellow fluorescent protein mCitrine an easy detectable monomer with excitation maximum at 516 nm and emission maximum at 529 nm. (Figure 1). After binding of TALD:KRAB on binding sites, a repression of reporter protein mCitrine occurs.
Single binding sequence for TALD:KRAB is: TCGTCCAATAGCTTCTC
Figure 1. Shematic representation of twelve specific binding site for TALD:KRAB upstream of CMV promoter and reporter protein mCitrine.
Characterization
Results: Specific TAL binding sites were further characterized with other reporter constructs.
- mCitrine was provided from host lab.
- Binding sites for TAL effectors were ordered from IDT.
Sequence and Features
- 10COMPATIBLE WITH RFC[10]
- 12COMPATIBLE WITH RFC[12]
- 21INCOMPATIBLE WITH RFC[21]Illegal BamHI site found at 464
Illegal XhoI site found at 1094 - 23COMPATIBLE WITH RFC[23]
- 25INCOMPATIBLE WITH RFC[25]Illegal AgeI site found at 16
Illegal AgeI site found at 248 - 1000COMPATIBLE WITH RFC[1000]
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