- PDB-8odn: RcpA-TadD with C13 symmetry from the Pseudomonas aeruginosa Tight... -
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基本情報
登録情報
データベース: PDB / ID: 8odn
タイトル
RcpA-TadD with C13 symmetry from the Pseudomonas aeruginosa Tight Adherence Secretion System
要素
RcpA
TPR repeat-containing protein PA4299
キーワード
MEMBRANE PROTEIN / Secretin / Pilotin / RcpA / TadD / TAD
機能・相同性
機能・相同性情報
type II protein secretion system complex / protein secretion / plasma membrane 類似検索 - 分子機能
Uncharacterised conserved protein UCP029658, TPR / Pilus formation protein, N-terminal / Pilus formation protein N terminal region / GspD/PilQ family / : / Type II/III secretion system / Bacterial type II and III secretion system protein / TPR repeat region circular profile. / TPR repeat profile. / Tetratricopeptide repeat ...Uncharacterised conserved protein UCP029658, TPR / Pilus formation protein, N-terminal / Pilus formation protein N terminal region / GspD/PilQ family / : / Type II/III secretion system / Bacterial type II and III secretion system protein / TPR repeat region circular profile. / TPR repeat profile. / Tetratricopeptide repeat / Prokaryotic membrane lipoprotein lipid attachment site profile. / Tetratricopeptide-like helical domain superfamily 類似検索 - ドメイン・相同性
RcpA / TPR repeat-containing protein PA4299 類似検索 - 構成要素
ジャーナル: Nat Commun / 年: 2023 タイトル: Assembly mechanism of a Tad secretion system secretin-pilotin complex. 著者: Matteo Tassinari / Marta Rudzite / Alain Filloux / Harry H Low / 要旨: The bacterial Tight adherence Secretion System (TadSS) assembles surface pili that drive cell adherence, biofilm formation and bacterial predation. The structure and mechanism of the TadSS is mostly ...The bacterial Tight adherence Secretion System (TadSS) assembles surface pili that drive cell adherence, biofilm formation and bacterial predation. The structure and mechanism of the TadSS is mostly unknown. This includes characterisation of the outer membrane secretin through which the pilus is channelled and recruitment of its pilotin. Here we investigate RcpA and TadD lipoprotein from Pseudomonas aeruginosa. Light microscopy reveals RcpA colocalising with TadD in P. aeruginosa and when heterologously expressed in Escherichia coli. We use cryogenic electron microscopy to determine how RcpA and TadD assemble a secretin channel with C13 and C14 symmetries. Despite low sequence homology, we show that TadD shares a similar fold to the type 4 pilus system pilotin PilF. We establish that the C-terminal four residues of RcpA bind TadD - an interaction essential for secretin formation. The binding mechanism between RcpA and TadD appears distinct from known secretin-pilotin pairings in other secretion systems.