4MI7 | pdb_00004mi7

Crystal Structure of Salmonella Effector Protein GtgE

• PDB DOI: https://doi.org/10.2210/pdb4MI7/pdb

• Classification: HYDROLASE, TOXIN
• Organism(s): Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2013-08-30 Released: 2014-02-12 
• Deposition Author(s): Kohler, A.C., Stebbins, C.E.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 
  0.230 (Depositor), 0.240 (DCC) 
• R-Value Work: 
  0.193 (Depositor), 0.200 (DCC) 
• R-Value Observed: 
  0.195 (Depositor) 

Literature

Structural and enzymatic characterization of a host-specificity determinant from Salmonella.

Kohler, A.C., Spano, S., Galan, J.E., Stebbins, C.E.

(2014) Acta Crystallogr D Biol Crystallogr 70: 384-391

• PubMed: 24531472 
• DOI: https://doi.org/10.1107/S1399004713028393
• Primary Citation of Related Structures:  
  4MI7


• PubMed Abstract: 
  

  GtgE is an effector protein from Salmonella Typhimurium that modulates trafficking of the Salmonella-containing vacuole. It exerts its function by cleaving the Rab-family GTPases Rab29, Rab32 and Rab38, thereby preventing the delivery of antimicrobial factors to the bacteria-containing vacuole. Here, the crystal structure of GtgE at 1.65 Å resolution is presented, and structure-based mutagenesis and in vivo infection assays are used to identify its catalytic triad. A panel of cysteine protease inhibitors were examined and it was determined that N-ethylmaleimide, antipain and chymostatin inhibit GtgE activity in vitro. These findings provide the basis for the development of novel therapeutic strategies to combat Salmonella infections.

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Organizational Affiliation: 

Laboratory of Structural Microbiology, Rockefeller University, New York, NY 10065, USA.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 16.04 kDa 
• Atom Count: 1,129 
• Modelled Residue Count: 124 
• Deposited Residue Count: 140 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bacteriophage encoded virulence factor	A	140	Salmonella enterica subsp. enterica serovar Typhimurium str. SL1344	Mutation(s): 0  Gene Names: gtgE, SL1344_0995
UniProt
Find proteins for H9L447 (Salmonella typhimurium (strain LT2 / SGSC1412 / ATCC 700720)) Explore H9L447  Go to UniProtKB:  H9L447

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	B [auth A]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free:  0.230 (Depositor), 0.240 (DCC) 
• R-Value Work:  0.193 (Depositor), 0.200 (DCC) 
• R-Value Observed: 0.195 (Depositor) 

Space Group: P 4₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 56.181	α = 90
b = 56.181	β = 90
c = 125.124	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
PDB_EXTRACT	data extraction
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
SOLVE	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2014-02-12 
Deposition Author(s): Kohler, A.C., Stebbins, C.E.

Revision History  

• Version 1.0: 2014-02-12
  Type: Initial release
  
• Version 1.1: 2014-09-24
  Changes: Database references
• Version 1.2: 2024-02-28
  Changes: Data collection, Database references, Derived calculations