3RAD

Quinolone(Clinafloxacin)-DNA cleavage complex of type IV topoisomerase from S. pneumoniae

3RAD の概要

• エントリーDOI: 10.2210/pdb3rad/pdb
• 関連するPDBエントリー: 2NOV 3FOE 3FOF 3K9F 3KSA 3KSB 3LTN 3RAE 3RAF
• 分子名称: DNA topoisomerase 4 subunit A, DNA topoisomerase 4 subunit B, 5'-D(*CP*AP*TP*GP*AP*AP*T)-3', ... (9 entities in total)
• 機能のキーワード: protein-dna cleavage complex, topoisomerase iia, clinafloxacin, isomerase-dna-antibiotic complex, isomerase/dna/antibiotic
• 由来する生物種: Streptococcus pneumoniae; 詳細
• タンパク質・核酸の鎖数: 8
• 化学式量合計: 185560.94

構造登録者

Laponogov, I.,Pan, X.-S.,Veselkov, D.A.,McAuley, K.E.,Fisher, L.M.,Sanderson, M.R. (登録日: 2011-03-28, 公開日: 2012-04-25, 最終更新日: 2024-11-06)

主引用文献

Laponogov, I.,Pan, X.S.,Veselkov, D.A.,Cirz, R.T.,Wagman, A.,Moser, H.E.,Fisher, L.M.,Sanderson, M.R.
Exploring the active site of the Streptococcus pneumoniae topoisomerase IV-DNA cleavage complex with novel 7,8-bridged fluoroquinolones.
Open Biol, 6:-, 2016

PubMed Abstract: As part of a programme of synthesizing and investigating the biological properties of new fluoroquinolone antibacterials and their targeting of topoisomerase IV from Streptococcus pneumoniae, we have solved the X-ray structure of the complexes of two new 7,8-bridged fluoroquinolones (with restricted C7 group rotation favouring tight binding) in complex with the topoisomerase IV from S. pneumoniae and an 18-base-pair DNA binding site-the E-site-found by our DNA mapping studies to bind drug strongly in the presence of topoisomerase IV (Leo et al. 2005 J. Biol. Chem. 280, 14 252-14 263, doi:10.1074/jbc.M500156200). Although the degree of antibiotic resistance towards fluoroquinolones is much lower than that of β-lactams and a range of ribosome-bound antibiotics, there is a pressing need to increase the diversity of members of this successful clinically used class of drugs. The quinolone moiety of the new 7,8-bridged agents ACHN-245 and ACHN-454 binds similarly to that of clinafloxocin, levofloxacin, moxifloxacin and trovofloxacin but the cyclic scaffold offers the possibility of chemical modification to produce interactions with other topoisomerase residues at the active site.

PubMed: 27655731
DOI: 10.1098/rsob.160157

実験手法

X-RAY DIFFRACTION (3.35 Å)