3Q1C

Structure of EspG Protein

• PDB DOI: https://doi.org/10.2210/pdb3Q1C/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Escherichia coli O127:H6 str. E2348/69
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2010-12-17 Released: 2011-02-23 
• Deposition Author(s): Spiller, B.W., Germane, K.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.188 
• R-Value Work: 0.161 
• R-Value Observed: 0.162 

Literature

Structural and Functional Studies Indicate That the EPEC Effector, EspG, Directly Binds p21-Activated Kinase.

Germane, K.L., Spiller, B.W.

(2011) Biochemistry 50: 917-919

• PubMed: 21235237 
• DOI: https://doi.org/10.1021/bi1020138
• Primary Citation of Related Structures:  
  3Q1C


• PubMed Abstract: 
  

  Bacterial pathogens secrete effectors into their hosts that subvert host defenses and redirect host processes. EspG is a type three secretion effector with a disputed function that is found in enteropathogenic Escherichia coli. Here we show that EspG is structurally similar to VirA, a Shigella virulence factor; EspG has a large, conserved pocket on its surface; EspG binds directly to the amino-terminal inhibitory domain of human p21-activated kinase (PAK); and mutations to conserved residues in the surface pocket disrupt the interaction with PAK.

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Organizational Affiliation: 

Department of Microbiology and Immunology, Vanderbilt University School of Medicine, Nashville, Tennessee 37232, United States.

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: 39.88 kDa 
• Atom Count: 3,163 
• Modelled Residue Count: 351 
• Deposited Residue Count: 360 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
LEE-encoded effector EspG	A	360	Escherichia coli O127:H6 str. E2348/69	Mutation(s): 0  Gene Names: E2348C_3970, E2348_C_3970, espG
UniProt
Find proteins for B7UMC8 (Escherichia coli O127:H6 (strain E2348/69 / EPEC)) Explore B7UMC8  Go to UniProtKB:  B7UMC8

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Free: 0.188 
• R-Value Work: 0.161 
• R-Value Observed: 0.162 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.15	α = 90
b = 74.378	β = 90
c = 93.921	γ = 90

Software Package:

Software Name	Purpose
PHENIX	model building
PHENIX	refinement
ADSC	data collection
HKL-2000	data reduction
HKL-2000	data scaling
PHENIX	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-02-23 
Deposition Author(s): Spiller, B.W., Germane, K.L.

Revision History  

• Version 1.0: 2011-02-23
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-02-21
  Changes: Data collection, Database references