当前位置: X-MOL 学术Mol. Microbiol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Characterization of TseB: A new actor in cell wall elongation in Bacillus subtilis
Molecular Microbiology ( IF 2.6 ) Pub Date : 2021-08-19 , DOI: 10.1111/mmi.14798
Jordan Delisle 1 , Baptiste Cordier 1 , Stéphane Audebert 2 , Matthieu Pophillat 2 , Caroline Cluzel 3 , Leon Espinosa 1 , Christophe Grangeasse 4 , Anne Galinier 1 , Thierry Doan 1
Affiliation  

Penicillin-binding proteins (PBPs) are crucial enzymes of peptidoglycan assembly and targets of β-lactam antibiotics. However, little is known about their regulation. Recently, membrane proteins were shown to regulate the bifunctional transpeptidases/glycosyltransferases aPBPs in some bacteria. However, up to now, regulators of monofunctional transpeptidases bPBPs have yet to be revealed. Here, we propose that TseB could be such a PBP regulator. This membrane protein was previously found to suppress tetracycline sensitivity of a Bacillus subtilis strain deleted for ezrA, a gene encoding a regulator of septation ring formation. In this study, we show that TseB is required for B. subtilis normal cell shape, tseB mutant cells being shorter and wider than wild-type cells. We observed that TseB interacts with PBP2A, a monofunctional transpeptidase. While TseB is not required for PBP2A activity, stability, and localization, we show that the overproduction of PBP2A is deleterious in the absence of TseB. In addition, we showed that TseB is necessary not only for efficient cell wall elongation during exponential phase but also during spore outgrowth, as it was also observed for PBP2A. Altogether, our results suggest that TseB is a new member of the elongasome that regulates PBP2A function during cell elongation and spore germination.

中文翻译:

TseB 的表征:枯草芽孢杆菌细胞壁伸长的新参与者

青霉素结合蛋白 (PBPs) 是肽聚糖组装的关键酶和 β-内酰胺类抗生素的靶标。然而,人们对他们的监管知之甚少。最近,膜蛋白被证明可以调节一些细菌中的双功能转肽酶/糖基转移酶 aPBPs。然而,到目前为止,尚未揭示单功能转肽酶 bPBPs 的调节剂。在这里,我们建议 TseB 可以成为这样的 PBP 监管机构。先前发现这种膜蛋白可以抑制 ezrA 缺失的枯草芽孢杆菌菌株的四环素敏感性, ezrA是编码分隔环形成调节因子的基因。在这项研究中,我们表明B需要 TseB 。枯草杆菌正常细胞形状,tseB突变细胞比野生型细胞更短更宽。我们观察到 TseB 与 PBP2A(一种单功能转肽酶)相互作用。虽然 PBP2A 的活性、稳定性和本地化不需要 TseB,但我们表明,在没有 TseB 的情况下,PBP2A 的过度生产是有害的。此外,我们发现 TseB 不仅对于指数期的有效细胞壁伸长是必要的,而且在孢子生长期间也是必要的,正如 PBP2A 也观察到的那样。总之,我们的研究结果表明,TseB 是细长体的一个新成员,它在细胞伸长和孢子萌发过程中调节 PBP2A 的功能。
更新日期:2021-10-25
down
wechat
bug