› 4k9b

X-ray diffraction
2.26Å resolution

Structure of Ternary Complex of cGAS with dsDNA and Bound c[G(2 ,5 )pA(3 ,5 )p]

Released:
DOI: 10.2210/pdb4k9b/pdb
PDB entry 4k9b coloured by chain, front view.
PDB entry 4k9b coloured by chain, side view.
PDB entry 4k9b coloured by chain, top view.
Source organism: Mus musculus
Primary publication:
Cyclic [G(2',5')pA(3',5')p] is the metazoan second messenger produced by DNA-activated cyclic GMP-AMP synthase.
Gao P, Ascano M, Wu Y, Barchet W, Gaffney BL, Zillinger T, Serganov AA, Liu Y, Jones RA, Hartmann G, Tuschl T, Patel DJ
Cell 153 1094-107 (2013)
PMID: 23647843

Function and Biology Details

Reaction catalysed: 
(1a) ATP + GTP = pppG-P(2'-5')A + diphosphate
Biochemical function:
  • not assigned
Biological process:
  • not assigned
Cellular component:
  • not assigned
Sequence domains:

Structure analysis Details

Assembly composition:
hetero trimer (preferred)
Assembly name:
PDBe Complex ID:
PDB-CPX-117729 (preferred)
Entry contents:
1 distinct polypeptide molecule
2 distinct DNA molecules
Macromolecules (3 distinct):
Cyclic GMP-AMP synthase Chain: A
Molecule details ›
Chain: A
Length: 362 amino acids
Theoretical weight: 42.51 KDa
Source organism: Mus musculus
Expression system: Escherichia coli
UniProt:
  • Canonical: Q8C6L5 (Residues: 147-507; Coverage: 71%)
Gene names: Cgas, Mb21d1
Sequence domains:
Structure domains:
DNA-F Chain: D
Molecule details ›
Chain: D
Length: 17 nucleotides
Theoretical weight: 5.25 KDa
Source organism: Mus musculus
Expression system: Not provided
DNA-R Chain: E
Molecule details ›
Chain: E
Length: 17 nucleotides
Theoretical weight: 5.16 KDa
Source organism: Mus musculus
Expression system: Not provided

Ligands and Environments

4 bound ligands:
Ligand ZN 1 x ZN
Ligand PO4 1 x PO4
Ligand G 1 x G
Ligand A 1 x A
No modified residues

Experiments and Validation Details

Entry percentile scores
X-ray source: APS BEAMLINE 24-ID-E
Spacegroup: I222
Unit cell:
a: 85.311Å b: 98.278Å c: 130.032Å
α: 90° β: 90° γ: 90°
R-values:
R R work R free
0.176 0.172 0.218
Expression systems:
  • Escherichia coli
  • Not provided

Quick links

Citations

193 review citations

Regulation and function of the cGAS-STING pathway of cytosolic DNA sensing.
Chen et al. (2016)
192 more

10 mentions without citation

Cyclic [G(2',5')pA(3',5')p] is the metazoan second messenger produced by DNA-activated cyclic GMP-AMP synthase.
Gao et al. (2013)
9 more