Structural highlights
Function
[TETR4_ECOLX] TetR is the repressor of the tetracycline resistance element; its N-terminal region forms a helix-turn-helix structure and binds DNA. Binding of tetracycline to TetR reduces the repressor affinity for the tetracycline resistance gene (tetA) promoter operator sites.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The tetracycline analog 9-(N, N-dimethylglycylamido)-6-demethyl-6-deoxy-tetracycline (9glyTc) belongs to a new group of tetracyclines called glycylcyclines. They are strong antibiotics showing reduced sensitivity against the major tetracycline resistance mechanisms. We have determined the crystal structure of 9glyTc in complex with Tet repressor class D, TetR(D), at 2.4 A resolution. Sterical hindrance at the entrance of the tetracycline binding tunnel of TetR by the bulky and charged glycyl amido substituent interferes with conformational changes required for the mechanism of induction, and leads to decreased induction efficiency as observed for point mutations of amino acid residues located in the neighbourhood to the glycylamido moiety of bound 9glyTc.
Crystal structure of the tet repressor in complex with a novel tetracycline, 9-(N,N-dimethylglycylamido)- 6-demethyl-6-deoxy-tetracycline.,Orth P, Schnappinger D, Sum PE, Ellestad GA, Hillen W, Saenger W, Hinrichs W J Mol Biol. 1999 Jan 15;285(2):455-61. PMID:9878420[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Orth P, Schnappinger D, Sum PE, Ellestad GA, Hillen W, Saenger W, Hinrichs W. Crystal structure of the tet repressor in complex with a novel tetracycline, 9-(N,N-dimethylglycylamido)- 6-demethyl-6-deoxy-tetracycline. J Mol Biol. 1999 Jan 15;285(2):455-61. PMID:9878420 doi:10.1006/jmbi.1998.2290
