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Example of a T-REx system controlling the expression of shRNA. Tetracycline-controlled transcriptional activation is a method of inducible gene expression where transcription is reversibly turned on or off in the presence of the antibiotic tetracycline or one of its derivatives (e.g. doxycycline).
The use of bacteria-derived tetracycline-inducible system permitting the switching on or off (Tet-On/Tet-Off system) [36] Targeted mutations by knock in gene and knock out sequence by using Cre-Lox recombination system [37] Introduction of retro viral mutations [38] Introduction of chemically induced mutations
The overall structure of TetR can be broken down into two DNA-binding domains (one per monomer) and a regulatory core, which is responsible for tetracycline recognition and dimerization. TetR dimerizes by making hydrophobic contacts within the regulatory core. There is a binding cavity for tetracycline in the outer helices of the regulatory domain.
[1] [3] This whole system is inducible so a chemical can be added to knock genes out at a specific time. Two of the most commonly used chemicals are tetracycline, which activates transcription of the Cre recombinase gene and tamoxifen, which activates transport of the Cre recombinase protein to the nucleus. [4]
Members of the tetracycline class of antibiotics are often used as research reagents in in vitro and in vivo biomedical research experiments involving bacteria as well in experiments in eukaryotic cells and organisms with inducible protein expression systems using tetracycline-controlled transcriptional activation. [61]
Once the KRAB domain was fused to the tetracycline repressor (TetR), the TetR-KRAB fusion proteins were the first engineered drug-inducible repressor that worked in mammalian cells. [3] Two distinct types of KRAB A domains can be structurally and functionally distinguished.
Tetracycline, sold under various brand names, is an antibiotic in the tetracyclines family of medications, used to treat a number of infections, [3] including acne, cholera, brucellosis, plague, malaria, and syphilis. [3]
Tet-based transactivator system - ligand-inducible control of gene transcription based upon the Tet system (P. falciparum) [1] Integration systems. Rep20 mediated;