Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

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

Macromolecule Content

• Total Structure Weight: 80.21 kDa 
• Atom Count: 5802 
• Residue Count: 678 
• Unique protein chains: 1

4AQN

Crystal structure of pesticin from Y. pestis

• DOI: 10.2210/pdb4AQN/pdb

• Classification: TOXIN
• Organism(s): Yersinia pestis
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• Deposited: 2012-04-19 Released: 2012-05-02 
• Deposition Author(s): Zeth, K., Albrecht, R.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.98 Å
• R-Value Free: 0.237 
• R-Value Work: 0.190 
• R-Value Observed: 0.192 

Literature

Structure and Mechanistic Studies of Pesticin, a Bacterial Homolog of Phage Lysozymes.

Patzer, S.I., Albrecht, R., Braun, V., Zeth, K.

(2012) J Biol Chem 287: 23381

• PubMed: 22593569 
• DOI: 10.1074/jbc.M112.362913
• Primary Citation of Related Structures:  
  4AQN, 4ARM, 4ARP, 4ARQ, 4ARJ, 4ARL


• PubMed Abstract: 
  

Yersinia pestis produces and secretes a toxin named pesticin that kills related bacteria of the same niche. Uptake of the bacteriocin is required for activity in the periplasm leading to hydrolysis of peptidoglycan. To understand the uptake mechanism and to investigate the function of pesticin, we combined crystal structures of the wild type enzyme, active site mutants, and a chimera protein with in vivo and in vitro activity assays. Wild type pesticin comprises an elongated N-terminal translocation domain, the intermediate receptor binding domain, and a C-terminal activity domain with structural analogy to lysozyme homologs. The full-length protein is toxic to bacteria when taken up to the target site via the outer or the inner membrane. Uptake studies of deletion mutants in the translocation domain demonstrate their critical size for import. To further test the plasticity of pesticin during uptake into bacterial cells, the activity domain was replaced by T4 lysozyme. Surprisingly, this replacement resulted in an active chimera protein that is not inhibited by the immunity protein Pim. Activity of pesticin and the chimera protein was blocked through introduction of disulfide bonds, which suggests unfolding as the prerequisite to gain access to the periplasm. Pesticin, a muramidase, was characterized by active site mutations demonstrating a similar but not identical residue pattern in comparison with T4 lysozyme.

---

Organizational Affiliation: 

Department of Protein Evolution, Max Planck Institute for Developmental Biology, Spemannstrasse 35, 72076 Tübingen, Germany.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PESTICIN	A, B	357	Yersinia pestis	Mutation(s): 0  Gene Names: pst, YPPCP1.05c, G4D65_19180, GD372_22925
Find proteins for Q57159 (Yersinia pestis) Explore Q57159  Go to UniProtKB:  Q57159

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MG	B	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.98 Å
• R-Value Free: 0.237 
• R-Value Work: 0.190 
• R-Value Observed: 0.192 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 36.55	α = 90
b = 86.78	β = 96.14
c = 122.27	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
SHARP	phasing
DM	phasing
BUCCANEER	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2012-04-19 
• Released Date: 2012-05-02 
Deposition Author(s): Zeth, K., Albrecht, R.

Revision History 

• Version 1.0: 2012-05-02
  Type: Initial release
  
• Version 1.1: 2012-05-30
  Changes: Other
• Version 1.2: 2012-07-18
  Changes: Other