8EAE

Structure of Ternary Complex of cGAS with dsDNA and Bound 5-pppG(2,5)pI

• PDB DOI: https://doi.org/10.2210/pdb8EAE/pdb
• NAKB: 8EAE

• Classification: TRANSFERASE/DNA
• Organism(s): Mus musculus, DNA molecule
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2022-08-29 Released: 2023-10-25 
• Deposition Author(s): Wu, S., Sohn, J.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.56 Å
• R-Value Free: 0.233 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 

Literature

The structural basis for 2'-5'/3'-5'-cGAMP synthesis by cGAS

Wu, S., Gabelli, S.B., Sohn, J.

(2024) Nat Commun 15: 4012

• DOI: https://doi.org/10.1038/s41467-024-48365-3

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 109.23 kDa 
• Atom Count: 7,463 
• Modelled Residue Count: 776 
• Deposited Residue Count: 800 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cyclic GMP-AMP synthase	A, B [auth C]	364	Mus musculus	Mutation(s): 0  Gene Names: Cgas, Mb21d1 EC: 2.7.7.86
UniProt & NIH Common Fund Data Resources
Find proteins for Q8C6L5 (Mus musculus) Explore Q8C6L5  Go to UniProtKB:  Q8C6L5
IMPC:  MGI:2442261

Entity ID: 2
Molecule	Chains	Length	Organism	Image
Palindromic DNA18	C [auth E], D [auth F], E [auth I], F [auth J]	18	DNA molecule

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
VLO (Subject of Investigation/LOI)	G [auth A], J [auth C]	[[(2~{R},3~{R},4~{R},5~{R})-5-(2-azanyl-6-oxidanylidene-1~{H}-purin-9-yl)-4-[[(2~{R},3~{S},4~{R},5~{R})-3,4-bis(oxidanyl)-5-(6-oxidanylidene-1~{H}-purin-9-yl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-3-oxidanyl-oxolan-2-yl]methoxy-oxidanyl-phosphoryl] phosphono hydrogen phosphate C20 H27 N9 O21 P4 QIEFBLFMZQEZSF-INFSMZHSSA-N
ZN	H [auth A], K [auth C]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
MG	I [auth A], L [auth C]	MAGNESIUM ION Mg JLVVSXFLKOJNIY-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.56 Å
• R-Value Free: 0.233 
• R-Value Work: 0.195 
• R-Value Observed: 0.197 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 77.428	α = 90
b = 99.322	β = 90
c = 141.723	γ = 90

Software Package:

Software Name	Purpose
XDS	data reduction
Aimless	data scaling
MOLREP	phasing
REFMAC	refinement
Coot	model building
PDB_EXTRACT	data extraction

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-10-25 
Deposition Author(s): Wu, S., Sohn, J.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	--

Revision History  

• Version 1.0: 2023-10-25
  Type: Initial release
  
• Version 1.1: 2024-05-22
  Changes: Database references