Molecular mechanism of SbmA, a promiscuous transporter exploited by antimicrobial peptides.
Molecular mechanism of SbmA, a promiscuous transporter exploited by antimicrobial peptides.
复制标题
DOI:
10.1126/sciadv.abj5363
复制
发表时间:
2021-09-10
期刊:
影响因子:
13.6
通讯作者:
Beis K
中科院分区:
文献类型:
--
作者:
Ghilarov D;Inaba-Inoue S;Stepien P;Qu F;Michalczyk E;Pakosz Z;Nomura N;Ogasawara S;Walker GC;Rebuffat S;Iwata S;Heddle JG;Beis K
Antimicrobial peptide transporter SbmA is an evolutionary link between ABC and proton-driven transporters. Antibiotic metabolites and antimicrobial peptides mediate competition between bacterial species. Many of them hijack inner and outer membrane proteins to enter cells. Sensitivity of enteric bacteria to multiple peptide antibiotics is controlled by the single inner membrane protein SbmA. To establish the molecular mechanism of peptide transport by SbmA and related BacA, we determined their cryo–electron microscopy structures at 3.2 and 6 Å local resolution, respectively. The structures show a previously unknown fold, defining a new class of secondary transporters named SbmA-like peptide transporters. The core domain includes conserved glutamates, which provide a pathway for proton translocation, powering transport. The structures show an outward-open conformation with a large cavity that can accommodate diverse substrates. We propose a molecular mechanism for antibacterial peptide uptake paving the way for creation of narrow-targeted therapeutics.
登录
查看更多内容
DOI:
10.1107/s0907444904019158
发表时间:
2004-12-01
影响因子:
2.2
作者:
Emsley, P;Cowtan, K
通讯作者:
Cowtan, K
DOI:
10.1007/978-1-4939-7454-2_7
发表时间:
2018-01-01
期刊:
BACTERIAL MULTIDRUG EXPORTERS
影响因子:
--
作者:
Jaenecke, Frank;Nakada-Nakura, Yoshiko;Tanabe, Mikio
通讯作者:
Tanabe, Mikio
影响因子:
4
作者:
Ghosal, Anubrata;Vitali, Ally;Nielsen, Peter E.
通讯作者:
Nielsen, Peter E.
影响因子:
3.6
作者:
Mattiuzzo, Maura;Bandiera, Antonella;Scocchi, Marco
通讯作者:
Scocchi, Marco
DOI:
10.1107/s2059798318006551
发表时间:
2018-06-01
期刊:
Acta crystallographica. Section D, Structural biology
影响因子:
--
作者:
Afonine PV;Poon BK;Read RJ;Sobolev OV;Terwilliger TC;Urzhumtsev A;Adams PD
通讯作者:
Adams PD