8KBG

Structure of CbTad1 complexed with 2',3'-cGAMP

• PDB DOI: https://doi.org/10.2210/pdb8KBG/pdb

• Classification: VIRAL PROTEIN
• Organism(s): Clostridium botulinum
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2023-08-04 Released: 2024-08-21 
• Deposition Author(s): Xiao, Y., Feng, Y.
• Funding Organization(s): National Natural Science Foundation of China (NSFC)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.37 Å
• R-Value Free: 0.247 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 

Starting Model: in silico

Literature

Single phage proteins sequester signals from TIR and CGAS-like enzymes

Li, D., Xiao, Y., Fedorova, I., Xiong, W., Wang, Y., Liu, X., Huiting, E., Ren, J., Gao, Z., Zhao, X., Cao, X., Zhang, Y., Bondy-denomy, J., Feng, Y.

(2024) Nature 

• DOI: https://doi.org/10.1038/s41586-024-08122-4

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Homo 6-mer - A6 

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

Biological Assembly Evidence: gel filtration

Macromolecule Content

• Total Structure Weight: 89.51 kDa 
• Atom Count: 6,346 
• Modelled Residue Count: 744 
• Deposited Residue Count: 744 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Thoeris anti-defense 1	A [auth D], B [auth E], C [auth F], D [auth G], E [auth H], F [auth I]	124	Clostridium botulinum	Mutation(s): 0  Gene Names: tad1
UniProt
Find proteins for P0DW58 (Clostridium botulinum) Explore P0DW58  Go to UniProtKB:  P0DW58

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1SY (Subject of Investigation/LOI)	G [auth D], H [auth E], I [auth F], J [auth G], K [auth H], L [auth I]	cGAMP C20 H24 N10 O13 P2 XRILCFTWUCUKJR-INFSMZHSSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.37 Å
• R-Value Free: 0.247 
• R-Value Work: 0.206 
• R-Value Observed: 0.208 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 71.9	α = 90
b = 66.04	β = 98.3
c = 89.37	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
Aimless	data scaling
xia2	data reduction
PHENIX	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-08-21 
Deposition Author(s): Xiao, Y., Feng, Y.

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Funding Organization	Location	Grant Number
National Natural Science Foundation of China (NSFC)	China	--

Revision History  

• Version 1.0: 2024-08-21
  Type: Initial release
  
• Version 1.1: 2024-11-06
  Changes: Database references, Structure summary