4JLX

Structure of porcine cyclic GMP-AMP synthase (cGAS)


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.004 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.188 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural mechanism of cytosolic DNA sensing by cGAS

Civril, F.Deimling, T.Mann, C.C.O.Ablasser, A.Moldt, M.Witte, G.Hornung, V.Hopfner, K.P.

(2013) Nature 498: 332-337

  • DOI: 10.1038/nature12305
  • Primary Citation of Related Structures:  4JLZ, 4KB6

  • PubMed Abstract: 
  • Cytosolic DNA arising from intracellular bacterial or viral infections is a powerful pathogen-associated molecular pattern (PAMP) that leads to innate immune host defence by the production of type I interferon and inflammatory cytokines. Recognition ...

    Cytosolic DNA arising from intracellular bacterial or viral infections is a powerful pathogen-associated molecular pattern (PAMP) that leads to innate immune host defence by the production of type I interferon and inflammatory cytokines. Recognition of cytosolic DNA by the recently discovered cyclic-GMP-AMP (cGAMP) synthase (cGAS) induces the production of cGAMP to activate the stimulator of interferon genes (STING). Here we report the crystal structure of cGAS alone and in complex with DNA, ATP and GTP along with functional studies. Our results explain the broad DNA sensing specificity of cGAS, show how cGAS catalyses dinucleotide formation and indicate activation by a DNA-induced structural switch. cGAS possesses a remarkable structural similarity to the antiviral cytosolic double-stranded RNA sensor 2'-5'oligoadenylate synthase (OAS1), but contains a unique zinc thumb that recognizes B-form double-stranded DNA. Our results mechanistically unify dsRNA and dsDNA innate immune sensing by OAS1 and cGAS nucleotidyl transferases.


    Organizational Affiliation

    Department of Biochemistry and Gene Center, Ludwig-Maximilians-University, 81377 Munich, Germany.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Uncharacterized protein
A
366Sus scrofaGene Names: MB21D1
EC: 2.7.7.86
Find proteins for I3LM39 (Sus scrofa)
Go to Gene View: MB21D1
Go to UniProtKB:  I3LM39
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

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A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
MLI
Query on MLI

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A
MALONATE ION
C3 H2 O4
OFOBLEOULBTSOW-UHFFFAOYSA-L
 Ligand Interaction
GOL
Query on GOL

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A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
PG4
Query on PG4

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A
TETRAETHYLENE GLYCOL
C8 H18 O5
UWHCKJMYHZGTIT-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.004 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.188 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 47.402α = 90.00
b = 118.014β = 90.00
c = 142.599γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-06-12
    Type: Initial release
  • Version 1.1: 2013-07-10
    Type: Database references