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 
  • R-Value Observed: 0.208 

wwPDB Validation   3D Report Full Report


This is version 1.3 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
  • Primary Citation of Related Structures:  
    4Q1Q

  • 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, including AIDA-I in diffusely adhering Escherichia coli (DAEC) and TibA in enterotoxigenic E ...

    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; National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; National Institute of Biological Sciences, Beijing, Collaborative Innovation Center for Cancer Medicine, Beijing 102206, China. Electronic address: shaofeng@nibs.ac.cn.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Adhesin/invasin TibA autotransporterA, B305Escherichia coli ETEC H10407Mutation(s): 0 
Gene Names: tibAETEC_2141
UniProt
Find proteins for Q9XD84 (Escherichia coli O78:H11 (strain H10407 / ETEC))
Explore Q9XD84 
Go to UniProtKB:  Q9XD84
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
289 (Subject of Investigation/LOI)
Query on 289

Download Ideal Coordinates CCD File 
AA [auth A] , AB [auth B] , BA [auth A] , BB [auth B] , C [auth A] , CA [auth A] , CB [auth B] , D [auth A] , 
AA [auth A], AB [auth B], BA [auth A], BB [auth B], C [auth A], CA [auth A], CB [auth B], D [auth A], DA [auth A], DB [auth B], E [auth A], EA [auth A], EB [auth B], F [auth A], FA [auth A], FB [auth B], G [auth A], GA [auth A], GB [auth B], H [auth A], HA [auth A], HB [auth B], I [auth A], IA [auth A], IB [auth B], J [auth A], JA [auth A], JB [auth B], K [auth A], KA [auth A], KB [auth B], L [auth A], LA [auth B], LB [auth B], M [auth A], MA [auth B], MB [auth B], N [auth A], NA [auth B], NB [auth B], O [auth A], OA [auth B], OB [auth B], P [auth A], PA [auth B], PB [auth B], Q [auth A], QA [auth B], QB [auth B], R [auth A], RA [auth B], RB [auth B], S [auth A], SA [auth B], SB [auth B], T [auth A], TA [auth B], TB [auth B], U [auth A], UA [auth B], V [auth A], VA [auth B], W [auth A], WA [auth B], X [auth A], XA [auth B], Y [auth A], YA [auth B], Z [auth A], ZA [auth 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, BL-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 
  • R-Value Observed: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.807α = 90
b = 62.166β = 90.9
c = 97.288γ = 90
Software Package:
Software NamePurpose
Blu-Icedata collection
SHARPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report




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  (Full details and data files)

  • Version 1.0: 2014-09-17
    Type: Initial release
  • Version 1.1: 2014-10-29
    Changes: Database references
  • Version 1.2: 2020-06-24
    Changes: Advisory, Data collection, Database references, Derived calculations
  • Version 1.3: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Data collection, Derived calculations