2XKK image
Deposition Date 2010-07-08
Release Date 2010-09-01
Last Version Date 2024-11-06
Entry Detail
PDB ID:
2XKK
Keywords:
ISOMERASE/DNA/ANTIBIOTIC
Title:
CRYSTAL STRUCTURE OF MOXIFLOXACIN, DNA, and A. BAUMANNII TOPO IV (PARE-PARC FUSION TRUNCATE)
Biological Source:
Source Organism:
ACINETOBACTER BAUMANNII (Taxon ID: 470)
SYNTHETIC CONSTRUCT (Taxon ID: 32630)
Host Organism:
ESCHERICHIA COLI
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
3.25 Å
R-Value Free:
0.27
R-Value Work:
0.19
R-Value Observed:
0.19
Space Group:
C 1 2 1
2XKK validation report
Macromolecular Entities
Structures with similar UniProt ID
Protein Blast
Polymer Type:polypeptide(L)
Molecule:TOPOISOMERASE IV
Gene (Uniprot):parC
Chain IDs:A, B (auth: C)
Chain Length:767
Number of Molecules:2
Biological Source:ACINETOBACTER BAUMANNII
UniProt ID:B0VP98 Pfam ID:PF00521
Polymer Type:polydeoxyribonucleotide
Molecule:DNA
Chain IDs:C (auth: E)
Chain Length:34
Number of Molecules:1
Biological Source:SYNTHETIC CONSTRUCT
Polymer Type:polydeoxyribonucleotide
Molecule:DNA
Chain IDs:D (auth: F)
Chain Length:34
Number of Molecules:1
Biological Source:SYNTHETIC CONSTRUCT
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
PTR A TYR O-PHOSPHOTYROSINE
Ligand Molecules
MFX
MG
Primary Citation
Structural Basis of Quinolone Inhibition of Type Iia Topoisomerases and Target-Mediated Resistance
Nat.Struct.Mol.Biol. 17 1152 ? (2010)
PMID: 20802486 DOI: 10.1038/NSMB.1892

Abstact

Quinolone antibacterials have been used to treat bacterial infections for over 40 years. A crystal structure of moxifloxacin in complex with Acinetobacter baumannii topoisomerase IV now shows the wedge-shaped quinolone stacking between base pairs at the DNA cleavage site and binding conserved residues in the DNA cleavage domain through chelation of a noncatalytic magnesium ion. This provides a molecular basis for the quinolone inhibition mechanism, resistance mutations and invariant quinolone antibacterial structural features.

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Protein

Chemical

Disease

Primary Citation of related structures
2XKJ