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: https://doi.org/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. 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.


  • Organizational Affiliation

    National Institute of Biological Sciences, Beijing 102206, China.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Adhesin/invasin TibA autotransporter
A, B
305Escherichia coli ETEC H10407Mutation(s): 0 
Gene Names: tibA
UniProt
Find proteins for Q9XD84 (Escherichia coli O78:H11 (strain H10407 / ETEC))
Explore Q9XD84 
Go to UniProtKB:  Q9XD84
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9XD84
Sequence Annotations
Expand
  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
289
Query on 289

Download Ideal Coordinates CCD File 
AA [auth A]
AB [auth B]
BA [auth A]
BB [auth B]
C [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
Modified Residues  1 Unique
IDChains TypeFormula2D 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 
  • 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

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