Difference between revisions of "Part:BBa K782064"

Revision as of 20:07, 25 September 2012

12x[TALD] operator_CMV promoter_TALB:NLS:KRAB

TALB and TALD labels represents TAL effectors 1297 and 1295 respectively from zebrafish experiments (Sander et al., 2011)

Introduction

TAL effectors (TALEs) are bacterial plant pathogen transcription factors, that bind to DNA by specifically recognizing one base pair with a single tandem repeat in their DNA-binding domain. A tandem TALE repeat contains 33 to 35 amino acids, where the 12th and 13th amino acid, called a “repeat variable diresidue” (RVD), are responsible for specific interactions with the corresponding base pair (Scholze and Boch, 2011).

This part contains 12 TALD binding sites, upstream of a CMV promoter (constitutive promoter for expression in mammalian cells). Downstream of the promoter there is a TAL repressor TALB:NLS:KRAB. This way we have a TAL effector under the control of another TAL effector, which allows us to create more complicated genetic circuits with more than one level of regulation.

Figure1:Schematic representation of the construct

References

Sander, J. D., Cade, L., Khayter, C., Reyon, D., Peterson, R. T., Joung, J. K., and Yeh, J.-R. J. (2011) Targeted gene disruption in somatic zebrafish cells using engineered TALENs. Nature Biotechnology 29, 697–698

Scholze, H., and Boch, J. (2011) TAL effectors are remote controls for gene activation. Curr. Opin. Microbiol. 14, 47-53

Sequence and Features