Biological Assembly 1  

 3D View: Structure | Electron Density

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

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 272.97 kDa 
• Atom Count: 17025 
• Modelled Residue Count: 2134 
• Deposited Residue Count: 2410 
• Unique protein chains: 1

6SUQ

Crystal Structure of TcdB2-TccC3-TEV

• DOI: 10.2210/pdb6SUQ/pdb

• Classification: TOXIN
• Organism(s): Photorhabdus luminescens, Tobacco etch virus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2019-09-16 Released: 2019-12-04 
• Deposition Author(s): Roderer, D., Schubert, E., Sitsel, O., Raunser, S.
• Funding Organization(s): European Research Council

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free: 0.302 
• R-Value Work: 0.269 

Literature

Towards the application of Tc toxins as a universal protein translocation system.

Roderer, D., Schubert, E., Sitsel, O., Raunser, S.

(2019) Nat Commun 10: 5263-5263

• PubMed: 31748551 
• DOI: 10.1038/s41467-019-13253-8
• Primary Citation of Related Structures:  
  6SUQ, 6SUP


• PubMed Abstract: 
  

Tc toxins are bacterial protein complexes that inject cytotoxic enzymes into target cells using a syringe-like mechanism. Tc toxins are composed of a membrane translocator and a cocoon that encapsulates a toxic enzyme. The toxic enzyme varies between Tc toxins from different species and is not conserved. Here, we investigate whether the toxic enzyme can be replaced by other small proteins of different origin and properties, namely Cdc42, herpes simplex virus ICP47, Arabidopsis thaliana iLOV, Escherichia coli DHFR, Ras-binding domain of CRAF kinase, and TEV protease. Using a combination of electron microscopy, X-ray crystallography and in vitro translocation assays, we demonstrate that it is possible to turn Tc toxins into customizable molecular syringes for delivering proteins of interest across membranes. We also infer the guidelines that protein cargos must obey in terms of size, charge, and fold in order to apply Tc toxins as a universal protein translocation system.

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Organizational Affiliation: 

Department of Structural Biochemistry, Max Planck Institute of Molecular Physiology, Otto-Hahn-Str. 11, 44227, Dortmund, Germany. [e-mail].

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
TcdB2,TccC3,Genome polyprotein	A	2410	Photorhabdus luminescens, Tobacco etch virus	Mutation(s): 0  Gene Names: tcdB2, TccC3 EC: 3.4 (PDB Primary Data), 3.4.22.45 (PDB Primary Data), 3.6.4 (PDB Primary Data), 3.4.22.44 (PDB Primary Data), 2.7.7.48 (PDB Primary Data)
Find proteins for P04517 (Tobacco etch virus) Explore P04517  Go to UniProtKB:  P04517
Find proteins for Q8GF99 (Photorhabdus luminescens) Explore Q8GF99  Go to UniProtKB:  Q8GF99
Find proteins for Q8GF97 (Photorhabdus luminescens) Explore Q8GF97  Go to UniProtKB:  Q8GF97

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.70 Å
• R-Value Free: 0.302 
• R-Value Work: 0.269 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 234.43	α = 90
b = 234.43	β = 90
c = 143.19	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
XDS	data reduction
XSCALE	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Deposited Date: 2019-09-16 
• Released Date: 2019-12-04 
Deposition Author(s): Roderer, D., Schubert, E., Sitsel, O., Raunser, S.

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Funding Organization	Location	Grant Number
European Research Council	Germany	615984

Revision History  

• Version 1.0: 2019-12-04
  Type: Initial release