Beta-lactam antibiotics induce a lethal malfunctioning of the bacterial cell wall synthesis machinery.

Beta-lactam antibiotics induce a lethal malfunctioning of the bacterial cell wall synthesis machinery.
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β-内酰胺抗生素诱导细菌细胞壁合成机械的致命故障。

DOI:
10.1016/j.cell.2014.11.017
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发表时间:
2014-12-04
期刊:
影响因子:
64.5
通讯作者:
Bernhardt TG
Bernhardt TG
中科院分区:
生物学1区
文献类型:
--
作者:
Cho H;Uehara T;Bernhardt TG

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青霉素和相关的β-内酰胺包括我们最古老,使用最广泛的抗生素疗法之一。长期以来,已知这些药物靶向构建细菌细胞壁的称为青霉素结合蛋白(PBP)。研究目标抑制的下游后果以及它们如何促进这些重要药物的致命作用,我们证明了β-内酰胺类不仅可以抑制PBP,而且通常是通常的。相反,它们引起了目标生物合成机制的有毒故障,涉及细胞壁合成和降解的徒劳循环,从而耗尽细胞资源并增强其杀伤活性。这种作用方式的表征还揭示了在细胞壁基质中切割键的酶的质量控制功能。因此,结果为细胞壁组装机理提供了深入的了解,并提出了如何最好地干扰未来抗生素发育的过程。
Penicillin and related beta-lactams comprise one of our oldest and most widely used antibiotic therapies. These drugs have long been known to target enzymes called penicillin-binding proteins (PBPs) that build the bacterial cell wall. Investigating the downstream consequences of target inhibition and how they contribute to the lethal action of these important drugs, we demonstrate that beta-lactams do more than just inhibit the PBPs as is commonly believed. Rather, they induce a toxic malfunctioning of their target biosynthetic machinery involving a futile cycle of cell wall synthesis and degradation, thereby depleting cellular resources and bolstering their killing activity. Characterization of this mode of action additionally revealed a quality-control function for enzymes that cleave bonds in the cell wall matrix. The results thus provide insight into the mechanism of cell wall assembly and suggest how best to interfere with the process for future antibiotic development.
DOI: 10.1016/s0092-8674(00)81928-5
发表时间: 1997-03-21
期刊: CELL
影响因子: 64.5
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