Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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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: 29247.11 
• Atom Count: 1998 
• Residue Count: 246 
• Unique protein chains: 2

4N7G

Crystal structure of 14-3-3zeta in complex with a peptide derived from ExoS

• DOI: 10.2210/pdb4N7G/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Homo sapiens, Pseudomonas aeruginosa
• Expression System: Escherichia coli BL21(DE3)


• Deposited: 2013-10-15 Released: 2014-02-19 
• Deposition Author(s): Bier, D., Glas, A., Hahne, G., Grossmann, T., Ottmann, C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.223 
• R-Value Work: 0.189 

Literature

Constrained peptides with target-adapted cross-links as inhibitors of a pathogenic protein-protein interaction.

Glas, A., Bier, D., Hahne, G., Rademacher, C., Ottmann, C., Grossmann, T.N.

(2014) Angew.Chem.Int.Ed.Engl. 53: 2489-2493

• PubMed: 24504455 
• DOI: 10.1002/anie.201310082
• Primary Citation of Related Structures:  
  4N84, 4N7Y


• PubMed Abstract: 
  

Bioactive conformations of peptides can be stabilized by macrocyclization, resulting in increased target affinity and activity. Such macrocyclic peptides proved useful as modulators of biological functions, in particular as inhibitors of protein-protein interactions (PPI). However, most peptide-derived PPI inhibitors involve stabilized α-helices, leaving a large number of secondary structures unaddressed. Herein, we present a rational approach towards stabilization of an irregular peptide structure, using hydrophobic cross-links that replace residues crucially involved in target binding. The molecular basis of this interaction was elucidated by X-ray crystallography and isothermal titration calorimetry. The resulting cross-linked peptides inhibit the interaction between human adaptor protein 14-3-3 and virulence factor exoenzyme S. Taking into consideration that irregular peptide structures participate widely in PPIs, this approach provides access to novel peptide-derived inhibitors.

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Organizational Affiliation: 

Chemical Genomics Centre of the Max Planck Society, Otto-Hahn-Strasse 15, 44227 Dortmund (Germany).

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
14-3-3 protein zeta/delta	A	235	Homo sapiens	Mutation(s): 0  Gene Names: YWHAZ
Find proteins for P63104 (Homo sapiens) Go to Gene View: YWHAZ Go to UniProtKB:  P63104

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details
Exoenzyme S	B	11	Pseudomonas aeruginosa	Mutation(s): 0  Gene Names: exoS
Find proteins for Q93SQ3 (Pseudomonas aeruginosa) Go to UniProtKB:  Q93SQ3

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
P6G	A	HEXAETHYLENE GLYCOL POLYETHYLENE GLYCOL PEG400 C12 H26 O7 IIRDTKBZINWQAW-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.25 Å
• R-Value Free: 0.223 
• R-Value Work: 0.189 
• Space Group: P 3₁ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 105.420	α = 90.00
b = 105.420	β = 90.00
c = 114.280	γ = 120.00

Software Package:

Software Name	Purpose
XDS	data scaling
PDB_EXTRACT	data extraction
XDS	data reduction
XSCALE	data scaling
PHASER	phasing
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2013-10-15 
• Released Date: 2014-02-19 
• Deposition Author(s): Bier, D., Glas, A., Hahne, G., Grossmann, T., Ottmann, C.

Revision History 

• Version 1.0: 2014-02-19
  Type: Initial release
• Version 1.1: 2014-03-12
  Type: Database references