1QOY | pdb_00001qoy

E.coli Hemolysin E (HlyE, ClyA, SheA)

• PDB DOI: https://doi.org/10.2210/pdb1QOY/pdb

• Classification: TOXIN
• Organism(s): Escherichia coli K-12
• Expression System: Escherichia coli K-12
• Mutation(s): Yes 


• Deposited: 1999-11-25 Released: 2000-01-23 
• Deposition Author(s): Wallace, A.J., Stillman, T.J., Atkins, A., Jamieson, S.J., Bullough, P.A., Green, J., Artymiuk, P.J.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Free: 
  0.252 (Depositor) 
• R-Value Work: 
  0.198 (Depositor) 

Literature

E. Coli Hemolysin E (Hlye, Clya, Shea): X-Ray Crystal Structure of the Toxin and Observation of Membrane Pores by Electron Microscopy

Wallace, A.J., Stillman, T.J., Atkins, A., Jamieson, S.J., Bullough, P.A., Green, J., Artymiuk, P.J.

(2000) Cell 100: 265

• PubMed: 10660049 
• DOI: https://doi.org/10.1016/s0092-8674(00)81564-0
• Primary Citation Related Structures: 
  1QOY


• PubMed Abstract: 
  

  Hemolysin E (HlyE) is a novel pore-forming toxin of Escherichia coli, Salmonella typhi, and Shigella flexneri. Here we report the X-ray crystal structure of the water-soluble form of E. coli HlyE at 2.0 A resolution and the visualization of the lipid-associated form of the toxin in projection at low resolution by electron microscopy. The crystal structure reveals HlyE to be the first member of a new family of toxin structures, consisting of an elaborated helical bundle some 100 A long. The electron micrographs show how HlyE oligomerizes in the presence of lipid to form transmembrane pores. Taken together, the data from these two structural techniques allow us to propose a simple model for the structure of the pore and for membrane interaction.

---

Organizational Affiliation: 
• The Krebs Institute, Department of Molecular Biology and Biotechnology, University of Sheffield, Western Bank, United Kingdom.

Biological Assembly 1  

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

Biological assembly 1 generated by PQS (software)

Macromolecule Content 

• Total Structure Weight: 35.1 kDa 
• Atom Count: 2,715 
• Modeled Residue Count: 303 
• Deposited Residue Count: 318 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
HEMOLYSIN E	A	318	Escherichia coli K-12	Mutation(s): 1  Gene Names: HLYE
UniProt
Find proteins for P77335 (Escherichia coli (strain K12)) Explore P77335  Go to UniProtKB:  P77335

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: 2.00 Å
• R-Value Free:  0.252 (Depositor) 
• R-Value Work:  0.198 (Depositor) 

Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 84.47	α = 90
b = 84.47	β = 90
c = 142.69	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
Agrovata	data scaling
ROTAVATA	data scaling
CCP4	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2000-01-23 
Deposition Author(s): Wallace, A.J., Stillman, T.J., Atkins, A., Jamieson, S.J., Bullough, P.A., Green, J., Artymiuk, P.J.

Revision History  

• Version 1.0: 2000-01-23
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2018-01-24
  Changes: Source and taxonomy
• Version 1.4: 2024-05-08
  Changes: Data collection, Database references, Derived calculations