Protein: DNA gyrase inhibitor (P33012)
Organism: Escherichia coli (strain K12)
Function: Inhibits the supercoiling activity of DNA gyrase. Acts by inhibiting DNA gyrase at an early step, prior to (or at the step of) binding of DNA by the gyrase. It protects cells against toxins that target DNA gyrase, by inhibiting activity of these toxins and reducing the formation of lethal double-strand breaks in the cell. Protects cells against the natural plasmid-encoded toxins microcin B17 (MccB17) and CcdB, and synthetic quinolones. Can also protect cells against alkylating agents that act independently of DNA gyrase, suggesting a more general role in protecting cells against DNA damage.
Subcellular location: Cytoplasm.
Sequence: MNYEIKQEEKRTVAGFHLVGPWEQTVKKGFEQLMMWVDSKNIVPKEWVAVYYDNPDETPAEKLRCDTVVTVPGYFTLPENSEGVILTEITGGQYAVAVARVVGDDFAKPWYQFFNSLLQDSAYEMLPKPCFEVYLNNGAEDGYWDIEMYVAVQPKHH
InterPro domains: - IPR010499: Bacterial transcription activator, effector binding (domain) [1-153]
- IPR029442: GyrI-like small molecule binding domain (domain) [1-152]
- IPR050908: DNA gyrase inhibitor (family) [1-154]
- IPR024911: DNA gyrase inhibitor GyrI (family) [1-155]
- IPR011256: Regulatory factor, effector binding domain superfamily (homologous_superfamily) [1-157]
Interaction partners: - Inner membrane protein YeeA
- Uncharacterized protein YbfE
- Putative acyl-CoA thioester hydrolase YbhC
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0097159 (organic cyclic compound binding), GO:1901363 (heterocyclic compound binding), GO:0003676 (nucleic acid binding), GO:0003677 (DNA binding), GO:0043565 (sequence-specific DNA binding)
Biological Process (BP): GO:0008150 (biological process), GO:0065007 (biological regulation), GO:0050789 (regulation of biological process), GO:0048519 (negative regulation of biological process), GO:0019222 (regulation of metabolic process), GO:0050794 (regulation of cellular process), GO:0048523 (negative regulation of cellular process), GO:0009892 (negative regulation of metabolic process), GO:0051172 (negative regulation of nitrogen compound metabolic process), GO:0010605 (negative regulation of macromolecule metabolic process), GO:0009889 (regulation of biosynthetic process), GO:0051171 (regulation of nitrogen compound metabolic process), GO:0060255 (regulation of macromolecule metabolic process), GO:0031323 (regulation of cellular metabolic process), GO:0009890 (negative regulation of biosynthetic process), GO:0080090 (regulation of primary metabolic process), GO:0031324 (negative regulation of cellular metabolic process), GO:0010556 (regulation of macromolecule biosynthetic process), GO:0031326 (regulation of cellular biosynthetic process), GO:0019219 (regulation of nucleobase-containing compound metabolic process), GO:0010558 (negative regulation of macromolecule biosynthetic process), GO:0031327 (negative regulation of cellular biosynthetic process), GO:0051252 (regulation of RNA metabolic process), GO:0051253 (negative regulation of RNA metabolic process), GO:0045934 (negative regulation of nucleobase-containing compound metabolic process), GO:0010468 (regulation of gene expression), GO:2001141 (regulation of RNA biosynthetic process), GO:1902679 (negative regulation of RNA biosynthetic process), GO:0006355 (regulation of DNA-templated transcription), GO:1903507 (negative regulation of nucleic acid-templated transcription), GO:1903506 (regulation of nucleic acid-templated transcription), GO:0045892 (negative regulation of DNA-templated transcription)
Cellular Component (CC): GO:0005575 (cellular component), GO:0110165 (cellular anatomical entity), GO:0005737 (cytoplasm), GO:0005829 (cytosol), GO:0005622 (intracellular anatomical structure)