The Type VI Secretion System Engages a Redox-Regulated Dual-Functional Heme Transporter for Zinc Acquisition.
The Type VI Secretion System Engages a Redox-Regulated Dual-Functional Heme Transporter for Zinc Acquisition.
复制标题
VI 型分泌系统利用氧化还原调节的双功能血红素转运蛋白来获取锌。
DOI:
10.1016/j.celrep.2017.06.081
复制
发表时间:
2017-07
期刊:
影响因子:
--
通讯作者:
Shen X
中科院分区:
文献类型:
--
作者:
Si M;Wang Y;Zhang B;Zhao C;Kang Y;Bai H;Wei D;Zhu L;Zhang L;Dong TG;Shen X
The type VI secretion system was recently reported to be involved in zinc acquisition, but the underlying mechanism remains unclear. Here, we report thatBurkholderia thailandensisT6SS4 is involved in zinc acquisition via secretion of a zinc-scavenging protein, TseZ, that interacts with the outer membrane heme transporter HmuR. We find that HmuR is a redox-regulated dual-functional transporter that transports heme iron under normal conditions but zinc upon sensing extracellular oxidative stress, triggered by formation of an intramolecular disulfide bond. Acting as the first line of defense against oxidative stress, HmuR not only guarantees an immediate response to the changing environment but also provides a fine-tuned mechanism that allows a gradual response to perceived stress. The T6SS/HmuR-mediated active zinc transport system is also involved in bacterial virulence and contact-independent bacterial competition. We describe a sophisticated bacterial zinc acquisition mechanism affording insights into the role of metal ion transport systems.
登录
查看更多内容
影响因子:
6.7
作者:
Wang T;Si M;Song Y;Zhu W;Gao F;Wang Y;Zhang L;Zhang W;Wei G;Luo ZQ;Shen X
通讯作者:
Shen X
影响因子:
3.7
作者:
Burtnick MN;Brett PJ
通讯作者:
Brett PJ
影响因子:
5.3
作者:
Zhang, DD;Lo, SC;Hannink, M
通讯作者:
Hannink, M
DOI:
10.1038/nrmicro2836
发表时间:
2012-07-16
期刊:
Nature reviews. Microbiology
影响因子:
--
作者:
通讯作者:
--
影响因子:
16.6
作者:
Lin J;Zhang W;Cheng J;Yang X;Zhu K;Wang Y;Wei G;Qian PY;Luo ZQ;Shen X
通讯作者:
Shen X