Pseudomonas aeruginosa (PAO1) Outer membrane PilQ (Secretin) with SlkB in C14 symmetry
マップデータ
試料
複合体: Pseudomonas aeruginosa (PAO1) Outer membrane PilQ (Secretin) with SlkB
タンパク質・ペプチド: Fimbrial assembly protein PilQ
タンパク質・ペプチド: Multidrug transporter
リガンド: PHOSPHATIDYLETHANOLAMINE
キーワード
type IV pili / secretin / plug / outer membrane / permeability barrier / antibiotics / drug resistance / TRANSPORT PROTEIN
機能・相同性
機能・相同性情報
type IV pilus assembly / protein secretion / cell outer membrane 類似検索 - 分子機能
Type IV pilus secretin PilQ / : / AMIN domain / AMIN domain / Secretin and TonB N terminus short domain / Secretin/TonB, short N-terminal domain / Secretin and TonB N terminus short domain / GspD/PilQ family / Bacterial type II secretion system protein D signature. / Type II secretion system protein GspD, conserved site ...Type IV pilus secretin PilQ / : / AMIN domain / AMIN domain / Secretin and TonB N terminus short domain / Secretin/TonB, short N-terminal domain / Secretin and TonB N terminus short domain / GspD/PilQ family / Bacterial type II secretion system protein D signature. / Type II secretion system protein GspD, conserved site / NolW-like / NolW-like superfamily / Bacterial type II/III secretion system short domain / Type II/III secretion system / Bacterial type II and III secretion system protein 類似検索 - ドメイン・相同性
Fimbrial assembly protein PilQ / Multidrug transporter 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2026 タイトル: Secretin-interacting plug proteins prevent antibiotic influx during type IV pilus assembly in Pseudomonas aeruginosa. 著者: Oh Hyun Kwon / Yeseul Lee / Bumhan Ryu / Joel W Sher / Sohee Park / Frédéric Lauber / Bi-O Kim / Youngki Yoo / Seung-Hyun Cho / Donghui Choe / You-Hee Cho / Jean-François Collet / Melanie ...著者: Oh Hyun Kwon / Yeseul Lee / Bumhan Ryu / Joel W Sher / Sohee Park / Frédéric Lauber / Bi-O Kim / Youngki Yoo / Seung-Hyun Cho / Donghui Choe / You-Hee Cho / Jean-François Collet / Melanie D Ohi / Thomas G Bernhardt / Jeong Min Chung / Hongbaek Cho / 要旨: Type IV pili (T4P) are important virulence factors that mediate host attachment and other pathogenic functions. In Gram-negative bacteria, T4P are assembled from pilin subunits at the inner membrane ...Type IV pili (T4P) are important virulence factors that mediate host attachment and other pathogenic functions. In Gram-negative bacteria, T4P are assembled from pilin subunits at the inner membrane (IM) and extend through the outer membrane (OM) via secretin channels. Although essential for T4P function, secretin complexes can impair the OM permeability barrier, potentially allowing entry of toxic compounds. The mechanisms that prevent such influx remain poorly understood. Here, we identify SlkA and SlkB (PA5122 and PA5123) as periplasmic proteins that interact with the T4P secretin channel and block antibiotic influx. Our data indicate that these proteins function as physical plugs sealing the channel until the IM complex docks and pilus assembly begins. These findings demonstrate that Slk proteins and the IM complex function redundantly to maintain OM barrier integrity, and that their interaction with the secretin channel represents a promising target for antibiotic potentiation.