5VDS

Human cyclic GMP-AMP synthase (cGAS) in complex with 3',3'-cdUMP


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.766 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.206 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The catalytic mechanism of cyclic GMP-AMP synthase (cGAS) and implications for innate immunity and inhibition.

Hall, J.Ralph, E.C.Shanker, S.Wang, H.Byrnes, L.J.Horst, R.Wong, J.Brault, A.Dumlao, D.Smith, J.F.Dakin, L.A.Schmitt, D.C.Trujillo, J.Vincent, F.Griffor, M.Aulabaugh, A.E.

(2017) Protein Sci. 26: 2367-2380

  • DOI: 10.1002/pro.3304
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Cyclic GMP-AMP synthase (cGAS) is activated by ds-DNA binding to produce the secondary messenger 2',3'-cGAMP. cGAS is an important control point in the innate immune response; dysregulation of the cGAS pathway is linked to autoimmune diseases while t ...

    Cyclic GMP-AMP synthase (cGAS) is activated by ds-DNA binding to produce the secondary messenger 2',3'-cGAMP. cGAS is an important control point in the innate immune response; dysregulation of the cGAS pathway is linked to autoimmune diseases while targeted stimulation may be of benefit in immunoncology. We report here the structure of cGAS with dinucleotides and small molecule inhibitors, and kinetic studies of the cGAS mechanism. Our structural work supports the understanding of how ds-DNA activates cGAS, suggesting a site for small molecule binders that may cause cGAS activation at physiological ATP concentrations, and an apparent hotspot for inhibitor binding. Mechanistic studies of cGAS provide the first kinetic constants for 2',3'-cGAMP formation, and interestingly, describe a catalytic mechanism where 2',3'-cGAMP may be a minor product of cGAS compared with linear nucleotides.


    Organizational Affiliation

    Worldwide Medicinal Chemistry, Pfizer, Eastern Point Road, Groton, Connecticut, 06340.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyclic GMP-AMP synthase
A, B
363Homo sapiensMutation(s): 0 
Gene Names: CGAS (C6orf150, MB21D1)
EC: 2.7.7.86
Find proteins for Q8N884 (Homo sapiens)
Go to UniProtKB:  Q8N884
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
9BJ
Query on 9BJ

Download SDF File 
Download CCD File 
A, B
3',3'-cdUMP
1-{(2R,6R,8R,10aR,12R,13R,13aS)-6-[(1R,2R)-2-(2,4-dioxo-3,4-dihydropyrimidin-1(2H)-yl)-1,2-dihydroxyethyl]-2,8,13-trihydroxy-2,8-dioxohexahydro-2H,4H,8H,10H-2lambda~5~,8lambda~5~-furo[3,2-d][1,3,7,9,2,8]tetraoxadiphosphacyclododecin-12-yl}pyrimidine-2,4(1H,3H)-dione
C18 H24 N4 O16 P2
SDBXSRQCWCPJQL-WXFFCYTBSA-N
 Ligand Interaction
ZN
Query on ZN

Download SDF File 
Download CCD File 
A, B
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.766 Å
  • R-Value Free: 0.245 
  • R-Value Work: 0.206 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 215.450α = 90.00
b = 48.408β = 104.81
c = 86.086γ = 90.00
Software Package:
Software NamePurpose
REFMACphasing
PHENIXrefinement
Aimlessdata scaling
PDB_EXTRACTdata extraction
Aimlessdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-09-27
    Type: Initial release
  • Version 1.1: 2017-10-04
    Type: Database references
  • Version 1.2: 2017-12-06
    Type: Database references