Structural and functional insights into oligopeptide acquisition by the RagAB transporter from Porphyromonas gingivalis.
Structural and functional insights into oligopeptide acquisition by the RagAB transporter from Porphyromonas gingivalis.
复制标题
DOI:
10.1038/s41564-020-0716-y
复制
发表时间:
2020-08
影响因子:
28.3
通讯作者:
van den Berg B
中科院分区:
文献类型:
--
作者:
Madej M;White JBR;Nowakowska Z;Rawson S;Scavenius C;Enghild JJ;Bereta GP;Pothula K;Kleinekathoefer U;Baslé A;Ranson NA;Potempa J;van den Berg B
Porphyromonas gingivalis, an asaccharolytic member of the Bacteroidetes, is a keystone pathogen in human periodontitis that may also contribute to the development of other chronic inflammatory diseases. P. gingivalis utilizes protease-generated peptides derived from extracellular proteins for growth, but how those peptides enter the cell is not clear. Here we identify RagAB as the outer membrane importer for peptides. X-ray crystal structures show that the transporter forms a dimeric RagA2B2complex, with the RagB substrate-binding surface-anchored lipoprotein forming a closed lid on the RagA TonB-dependent transporter. Cryo-electron microscopy structures reveal the opening of the RagB lid and thus provide direct evidence for a "pedal bin" nutrient uptake mechanism. Together with mutagenesis, peptide bindingstudies and RagAB peptidomics, our work identifies RagAB as a dynamic,selective OM oligopeptide acquisition machine that is essential for the efficient utilisation of proteinaceous nutrients by P. gingivalis.
登录
查看更多内容
影响因子:
4.6
作者:
Ho MH;Lamont RJ;Xie H
通讯作者:
Xie H
影响因子:
64.8
作者:
Glenwright AJ;Pothula KR;Bhamidimarri SP;Chorev DS;Baslé A;Firbank SJ;Zheng H;Robinson CV;Winterhalter M;Kleinekathöfer U;Bolam DN;van den Berg B
通讯作者:
van den Berg B
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
影响因子:
48
作者:
Gibson, Daniel G.;Young, Lei;Smith, Hamilton O.
通讯作者:
Smith, Hamilton O.
影响因子:
--
作者:
Belanger, Myriam;Rodrigues, Paulo;Progulske-Fox, Ann
通讯作者:
Progulske-Fox, Ann