8SI0

Structure of binary complex of human cGAS and bound cGAMP

• PDB DOI: https://doi.org/10.2210/pdb8SI0/pdb

• Classification: TRANSFERASE
• Organism(s): Homo sapiens
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2023-04-14 Released: 2024-04-24 
• 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: 2.70 Å
• R-Value Free: 0.280 
• R-Value Work: 0.217 
• R-Value Observed: 0.223 

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: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: isothermal titration calorimetry

Macromolecule Content

• Total Structure Weight: 43.71 kDa 
• Atom Count: 2,834 
• Modelled Residue Count: 339 
• Deposited Residue Count: 369 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Cyclic GMP-AMP synthase	A	369	Homo sapiens	Mutation(s): 0  Gene Names: CGAS, C6orf150, MB21D1 EC: 2.7.7.86
UniProt & NIH Common Fund Data Resources
Find proteins for Q8N884 (Homo sapiens) Explore Q8N884  Go to UniProtKB:  Q8N884
PHAROS:  Q8N884 GTEx:  ENSG00000164430

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
1SY (Subject of Investigation/LOI)	B [auth A]	cGAMP C20 H24 N10 O13 P2 XRILCFTWUCUKJR-INFSMZHSSA-N
ZN	C [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Free: 0.280 
• R-Value Work: 0.217 
• R-Value Observed: 0.223 
• Space Group: P 2₁ 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 47.927	α = 90
b = 59.657	β = 90
c = 125.327	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2024-04-24 
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: 2024-04-24
  Type: Initial release
  
• Version 1.1: 2024-05-22
  Changes: Database references