Artificially designed TALE-DNA-binding domains fused to nuclease or activation and repressor domains provide an outstanding toolbox for targeted gene editing and gene regulation in research, biotechnology and gene therapy.
Such control is made possible by designed transcriptional regulators which are fusions of engineered DNA binding proteins and activator or repressor domains.
23 NRSF is composed of a DNA binding domain located within the cluster of eight zinc fingers, and two repressor domains at the N- and C-termini, which are capable of interacting with corepressor complex components.
6 Both LAP$ and LAP are transcriptional activators, whereas LIP (which is the shortest isoform and lacks transactivation domains but retains DNA binding and dimerization domains) acts as a repressor or a dominant negative inhibitor of other C/EBP family transcription factors.
Several proteins have been shown to bind in the repressor domain including the CREB binding protein (CBP) [ 48], high mobility group protein 1 (HMG1) [ 49], members of the Maf family of basic-leucine zipper (bZip) activators [ 50], and geminin [ 51].
Furthermore, these data demonstrate that inhibition of EWS/FLI-1 transcription via sequence-specific DNA binding of the KRAB repressor domain is sufficient to inhibit the transformed phenotype.
Fezf2 contains two functional domains: a DNA-binding zinc finger domain, and an Eh1 repressor domain that interacts with TLEs (Buscarlet and Stifani, 2007).
Furthermore, a putative EAR (ethylene-responsive element-binding associated amphiphilic repression) repressor domain with the signature (S /(F DLN(L /(F XP was identified at the C-terminal positions 176 and 180 of CgZF1.
We generated custom perl script models for the following transactivation/repression domains to facilitate their identification across filozoan KLF/SP proteins (Supplementary Material online): SID repressor domain, PVDLS repressor domain, R2/R3 repressor domains, the Btd box, and the SP box.
Since Gli factors play complimentary roles [12], we utilized a Gli2 dominant-negative construct, created by fusing the Gli2 DNA binding domain to the Engrailed repressor domain, termed Gli/EnR.
