1ORK image
Deposition Date 1998-05-21
Release Date 1999-06-15
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1ORK
Title:
TET REPRESSOR, CLASS D IN COMPLEX WITH 9-(N,N-DIMETHYLGLYCYLAMIDO)-6-DEMETHYL-6-DEOXY-TETRACYCLINE
Biological Source:
Source Organism:
Escherichia coli (Taxon ID: 562)
Host Organism:
Method Details:
Experimental Method:
Resolution:
2.40 Å
R-Value Free:
0.27
R-Value Work:
0.21
R-Value Observed:
0.21
Space Group:
I 41 2 2
Macromolecular Entities
Polymer Type:polypeptide(L)
Molecule:TETRACYCLINE REPRESSOR
Gene (Uniprot):tetR
Mutations:S2A
Chain IDs:A
Chain Length:207
Number of Molecules:1
Biological Source:Escherichia coli
Primary Citation
Crystal structure of the tet repressor in complex with a novel tetracycline, 9-(N,N-dimethylglycylamido)- 6-demethyl-6-deoxy-tetracycline.
J.Mol.Biol. 285 455 461 (1999)
PMID: 9878420 DOI: 10.1006/jmbi.1998.2290

Abstact

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.

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Primary Citation of related structures