Primary Citation PubMed: 19448616
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Structural insights into the quinolone resistance mechanism of Mycobacterium tuberculosis DNA gyrase.
(2010) PLoS One 5
PubMed: 20805881 | PubMedCentral: PMC2923608 | DOI: 10.1371/journal.pone.0012245
The sequence names are as follows: MtGyr (PDB code 3IFZ) (this work), M. tuberculosis DNA gyrase; SpTopIV (PDB code 3FOF) (26), S. pneumoniae topoisomerase IV and ScTopII (PDB code 2RGR) (29), S. cere... isiae topoisomerase II.
Molecular modeling The catalytic core model (GA57BK 2 +TopBK 2 +DNA) was generated by superposition onto the crystal structure of the Streptococcus pneumoniae topoisomerase IV catalytic core  (pdb accession code 3FOF).
The first picture of the enzyme-quinolone interactions was given by the low resolution structures of Streptococcus pneumoniae ParC breakage-reunion and ParE Toprim domain in complex with DNA and quinolones (PDB codes 3FOF and 3K9F,  ).
M. tuberculosis DNA gyrase GA57BK (3IFZ) (this work) in light green, M. tuberculosis DNA gyrase MtGyrA59 (3ILW, 25) in pale green, E. coli DNA gyrase (1AB4) (36) in dark green, S. pneumoniae topoisomerase IV (2NOV) (33) in red, S. aureus topoisomerase IV (2INR) (34) in pale red, S. pneumoniae complexed with DNA (3FOF) (26) in dark red and E. coli topoisomerase IV (1ZVU) in firebrick.
Chains A and B from 3IFZ (GA57BK) were superposed to the corresponding chains from 3FOF, respectively, using SSM implemented in coot.
Until now, this helix was only observed when the Toprim domain is also present, whether DNA is complexed (in the structure of the S. pneumoniae topoisomerase IV catalytic core in complex with DNA, 3FOF  and the yeast topoisomerase II catalytic core-DNA complex, 2RGR  ) or not (in the two structures of the yeast topoisomerase II catalytic core, 1BJT  and 1BGW  ).
Publication Year: 2010
PubMed ID is not available.
Published in 2015
The co-ordinates of ciprofloxacin (PDB: 2XCT), levofloxacin (PDB: 3K9F), dextrofloxacin (PDB: 2BML) and moxifloxacin (PDB: 3FOF) were obtained from the crystal structures of their respective complexes...
Publication Year: 2015
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