Structural Flexibility of an Inhibitor Overcomes Drug Resistance Mutations in Staphylococcus aureus FtsZ.
Structural Flexibility of an Inhibitor Overcomes Drug Resistance Mutations in Staphylococcus aureus FtsZ.
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DOI:
10.1021/acschembio.7b00323
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发表时间:
2017-07-21
影响因子:
4
通讯作者:
Matsumura H
中科院分区:
文献类型:
--
作者:
Fujita J;Maeda Y;Mizohata E;Inoue T;Kaul M;Parhi AK;LaVoie EJ;Pilch DS;Matsumura H
In the effort to combat antibiotic resistance, inhibitors of the essential bacterial protein FtsZ have emerged as a promising new class of compounds with clinical potential. One such FtsZ inhibitor (TXA707) is associated with potent activity against clinical isolates of methicillin-resistant Staphylococcus aureus (MRSA) that are resistant to current standard-of-care antibiotics. However, mutations in S. aureus FtsZ (SaFtsZ) that confer resistance to TXA707 have been observed, with mutations in the Gly196 and Gly193 residues being among the most prevalent. Here, we describe structural studies of an FtsZ inhibitor, TXA6101, which retains activity against MRSA that express either G196S or G193D mutant FtsZ. We present the crystal structures of TXA6101 in complex with both wildtype SaFtsZ and G196S mutant SaFtsZ, as well the crystal structure of TXA707 in complex with wildtype SaFtsZ. Comparison of the three structures reveals a molecular basis for the differential targeting abilities of TXA6101 and TXA707. The greater structural flexibility of TXA6101 relative to TXA707 enables TXA6101 to avoid steric clash with Ser196 and Asp193. Our structures also demonstrate that the binding of TXA6101 induces previously unobserved conformational rearrangements of SaFtsZ residues in the binding pocket. In the aggregate, the structures reported in this work reveal key factors for overcoming drug resistance mutations in SaFtsZ, and offer a structural basis for the design of FtsZ inhibitors with enhanced antibacterial potency and a reduced susceptibility to mutational resistance.
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影响因子:
5.8
作者:
Kaul, Malvika;Mark, Lilly;Pilch, Daniel S.
通讯作者:
Pilch, Daniel S.
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
影响因子:
4.9
作者:
Kaul, Malvika;Mark, Lilly;Pilch, Daniel S.
通讯作者:
Pilch, Daniel S.
影响因子:
56.9
作者:
Haydon, David J.;Stokes, Neil R.;Czaplewski, Lloyd G.
通讯作者:
Czaplewski, Lloyd G.
DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH