4Q1Q

Crystal structure of TibC-catalyzed hyper-glycosylated TibA55-350 fragment


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

An iron-containing dodecameric heptosyltransferase family modifies bacterial autotransporters in pathogenesis

Lu, Q.Yao, Q.Xu, Y.Li, L.Li, S.Liu, Y.Gao, W.Niu, M.Sharon, M.Ben-Nissan, G.Zamyatina, A.Liu, X.Chen, S.Shao, F.

(2014) Cell Host Microbe 16: 351-363

  • DOI: 10.1016/j.chom.2014.08.008
  • Also Cited By: 4RAP

  • PubMed Abstract: 
  • Autotransporters deliver virulence factors to the bacterial surface by translocating an effector passenger domain through a membrane-anchored barrel structure. Although passenger domains are diverse, those found in enteric bacteria autotransporters, ...

    Autotransporters deliver virulence factors to the bacterial surface by translocating an effector passenger domain through a membrane-anchored barrel structure. Although passenger domains are diverse, those found in enteric bacteria autotransporters, including AIDA-I in diffusely adhering Escherichia coli (DAEC) and TibA in enterotoxigenic E. coli, are commonly glycosylated. We show that AIDA-I is heptosylated within the bacterial cytoplasm by autotransporter adhesin heptosyltransferase (AAH) and its paralogue AAH2. AIDA-I heptosylation determines DAEC adhesion to host cells. AAH/AAH2 define a bacterial autotransporter heptosyltransferase (BAHT) family that contains ferric ion and adopts a dodecamer assembly. Structural analyses of the heptosylated TibA passenger domain reveal 35 heptose conjugates forming patterned and solenoid-like arrays on the surface of a β helix. Additionally, CARC, the AIDA-like autotransporter from Citrobacter rodentium, is essential for colonization in mice and requires heptosylation by its cognate BAHT. Our study establishes a bacterial glycosylation system that regulates virulence and is essential for pathogenesis.


    Related Citations: 
    • A structural mechanism for bacterial autotransporter glycosylation by a dodecameric heptosyltransferase family
      Yao, Q.,Lu, Q.,Wan, X.,Song, F.,Xu, Y.,Hu, M.,Zamyatina, A.,Liu, X.,Huang, N.,Zhu, P.,Shao, F.
      (2014) Elife 3: e03714


    Organizational Affiliation

    National Institute of Biological Sciences, Beijing 102206, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Adhesin/invasin TibA autotransporter
A, B
305Escherichia coli O78:H11 (strain H10407 / ETEC)Mutation(s): 0 
Gene Names: tibA
Find proteins for Q9XD84 (Escherichia coli O78:H11 (strain H10407 / ETEC))
Go to UniProtKB:  Q9XD84
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
289
Query on 289

Download SDF File 
Download CCD File 
A, B
D-glycero-alpha-D-manno-heptopyranose
C7 H14 O7
BGWQRWREUZVRGI-QTNLNCNHSA-N
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A, B
L-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.11 Å
  • R-Value Free: 0.248 
  • R-Value Work: 0.205 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 46.807α = 90.00
b = 62.166β = 90.90
c = 97.288γ = 90.00
Software Package:
Software NamePurpose
Blu-Icedata collection
REFMACrefinement
HKL-2000data scaling
SHARPphasing
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2014-04-04 
  • Released Date: 2014-09-17 
  • Deposition Author(s): Yao, Q., Lu, Q., Shao, F.

Revision History 

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2014-10-29
    Type: Database references