6RJM

Complex structure of virulence factor SghA and its hydrolysis product glucose


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.112 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Agrobacteria reprogram virulence gene expression by controlled release of host-conjugated signals.

Wang, C.Ye, F.Chang, C.Liu, X.Wang, J.Wang, J.Yan, X.F.Fu, Q.Zhou, J.Chen, S.Gao, Y.G.Zhang, L.H.

(2019) Proc.Natl.Acad.Sci.USA 116: 22331-22340

  • DOI: 10.1073/pnas.1903695116
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • It is highly intriguing how bacterial pathogens can quickly shut down energy-costly infection machinery once successful infection is established. This study depicts that mutation of repressor SghR increases the expression of hydrolase SghA in <i>Agr ...

    It is highly intriguing how bacterial pathogens can quickly shut down energy-costly infection machinery once successful infection is established. This study depicts that mutation of repressor SghR increases the expression of hydrolase SghA in Agrobacterium tumefaciens , which releases plant defense signal salicylic acid (SA) from its storage form SA β-glucoside (SAG). Addition of SA substantially reduces gene expression of bacterial virulence. Bacterial vir genes and sghA are differentially transcribed at early and later infection stages, respectively. Plant metabolite sucrose is a signal ligand that inactivates SghR and consequently induces sghA expression. Disruption of sghA leads to increased vir expression in planta and enhances tumor formation whereas mutation of sghR decreases vir expression and tumor formation. These results depict a remarkable mechanism by which A. tumefaciens taps on the reserved pool of plant signal SA to reprogram its virulence upon establishment of infection.


    Organizational Affiliation

    School of Biological Sciences, Nanyang Technological University, 637551, Singapore.,Institute of Molecular and Cell Biology, 138673, Singapore.,Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, 510642 Guangzhou, China; lhzhang01@scau.edu.cn ygao@ntu.edu.sg.,Guangdong Province Key Laboratory of Microbial Signals and Disease Control, Integrative Microbiology Research Centre, South China Agricultural University, 510642 Guangzhou, China.,Institute of Molecular and Cell Biology, 138673, Singapore; lhzhang01@scau.edu.cn ygao@ntu.edu.sg.,Chongqing Academy of Chinese Materia Medica, Chongqing City, 400065, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-glucosidase
A, B
490Agrobacterium tumefaciens A6Mutation(s): 0 
Gene Names: sghA
EC: 3.2.1.21
Find proteins for A0A2I4PGZ0 (Agrobacterium tumefaciens A6)
Go to UniProtKB:  A0A2I4PGZ0
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GLC
Query on GLC

Download SDF File 
Download CCD File 
A, B
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.112 Å
  • R-Value Free: 0.230 
  • R-Value Work: 0.181 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 59.035α = 90.00
b = 84.590β = 90.00
c = 184.732γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata scaling
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
National Research Foundation (Singapore)SingaporeNRF-RF2009-RF001-267
National Basic Research Program of China(973 Program)China2015CB150600

Revision History 

  • Version 1.0: 2019-10-09
    Type: Initial release
  • Version 1.1: 2019-10-23
    Type: Data collection, Database references
  • Version 1.2: 2019-11-06
    Type: Data collection, Database references