Inhibition of D-Ala:D-Ala ligase through a phosphorylated form of the antibiotic D-cycloserine.

Inhibition of D-Ala:D-Ala ligase through a phosphorylated form of the antibiotic D-cycloserine.
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DOI:
10.1038/s41467-017-02118-7
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发表时间:
2017-12-05
影响因子:
16.6
通讯作者:
Roper DI
Roper DI
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Batson S;de Chiara C;Majce V;Lloyd AJ;Gobec S;Rea D;Fülöp V;Thoroughgood CW;Simmons KJ;Dowson CG;Fishwick CWG;de Carvalho LPS;Roper DI

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D-环丝氨酸是一种抗生素,其靶向连续的细菌细胞壁肽聚糖生物合成酶:丙氨酸消旋酶和D-丙氨酸:D-丙氨酸连接酶。通过结构,化学和机理的研究相结合,在这里,我们表明,抑制D-丙氨酸:D-丙氨酸连接酶的抗生素D-环丝氨酸收益通过一个独特的磷酸化形式的药物。这一机制的洞察力揭示了一个双峰作用机制的单一抗生素对不同的酶的目标,并具有重要意义的设计未来的抑制剂分子的基础上,这种化学结构。抗生素D-环丝氨酸(DCS)靶向肽聚糖生物合成酶D-Ala-D-Ala连接酶(Ddl)。通过对E. coliDdlB中的活性位点具有磷酸化的DCS分子,其在晶体中形成并模拟D-丙氨酰磷酸中间体。
D-cycloserine is an antibiotic which targets sequential bacterial cell wall peptidoglycan biosynthesis enzymes: alanine racemase and D-alanine:D-alanine ligase. By a combination of structural, chemical and mechanistic studies here we show that the inhibition of D-alanine:D-alanine ligase by the antibiotic D-cycloserine proceeds via a distinct phosphorylated form of the drug. This mechanistic insight reveals a bimodal mechanism of action for a single antibiotic on different enzyme targets and has significance for the design of future inhibitor molecules based on this chemical structure. The antibiotic D-cycloserine (DCS) targets the peptidoglycan biosynthesis enzyme D-Ala-D-Ala ligase (Ddl). Here the authors reveal the DCS inhibitory mechanism by determining the structure of E. coli DdlB with a phosphorylated DCS molecule in the active site that formed in crystallo and mimics the D-alanyl phosphate intermediate.
DOI: 10.1128/jb.110.3.978-987.1972
发表时间: 1972-01-01
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