A role for the periplasmic adaptor protein AcrA in vetting substrate access to the RND efflux transporter AcrB.
A role for the periplasmic adaptor protein AcrA in vetting substrate access to the RND efflux transporter AcrB.
复制标题
DOI:
10.1038/s41598-022-08903-9
复制
发表时间:
2022-03-19
影响因子:
4.6
通讯作者:
Blair JMA
中科院分区:
文献类型:
--
作者:
Alav I;Bavro VN;Blair JMA
Tripartite resistance-nodulation-division (RND) efflux pumps, such as AcrAB-TolC of Salmonella Typhimurium, contribute to antibiotic resistance and comprise an inner membrane RND-transporter, an outer membrane factor, and a periplasmic adaptor protein (PAP). The role of the PAP in the assembly and active transport process remains poorly understood. Here, we identify the functionally critical residues involved in PAP-RND-transporter binding between AcrA and AcrB and show that the corresponding RND-binding residues in the closely related PAP AcrE, are also important for its interaction with AcrB. We also report a residue in the membrane-proximal domain of AcrA, that when mutated, differentially affects the transport of substrates utilising different AcrB efflux channels, namely channels 1 and 2. This supports a potential role for the PAP in sensing the substrate-occupied state of the proximal binding pocket of the transporter and substrate vetting. Understanding the PAP’s role in the assembly and function of tripartite RND pumps can guide novel ways to inhibit their function to combat antibiotic resistance.
登录
查看更多内容
影响因子:
3.2
作者:
Elkins, CA;Nikaido, H
通讯作者:
Nikaido, H
影响因子:
3.6
作者:
Nishino, K;Latifi, T;Groisman, EA
通讯作者:
Groisman, EA
影响因子:
62.1
作者:
Alav I;Kobylka J;Kuth MS;Pos KM;Picard M;Blair JMA;Bavro VN
通讯作者:
Bavro VN
影响因子:
2.6
作者:
Neuberger, Arthur;Du, Dijun;Luisi, Ben E.
通讯作者:
Luisi, Ben E.
影响因子:
64.8
作者:
Murakami, Satoshi;Nakashima, Ryosuke;Yamaguchi, Akihito
通讯作者:
Yamaguchi, Akihito