5XZE

Mouse cGAS bound to the inhibitor RU332


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.177 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Small molecule inhibition of cGAS reduces interferon expression in primary macrophages from autoimmune mice.

Vincent, J.Adura, C.Gao, P.Luz, A.Lama, L.Asano, Y.Okamoto, R.Imaeda, T.Aida, J.Rothamel, K.Gogakos, T.Steinberg, J.Reasoner, S.Aso, K.Tuschl, T.Patel, D.J.Glickman, J.F.Ascano, M.

(2017) Nat Commun 8: 750-750

  • DOI: 10.1038/s41467-017-00833-9
  • Primary Citation of Related Structures:  5XZB, 5XZG

  • PubMed Abstract: 
  • Cyclic GMP-AMP synthase is essential for innate immunity against infection and cellular damage, serving as a sensor of DNA from pathogens or mislocalized self-DNA. Upon binding double-stranded DNA, cyclic GMP-AMP synthase synthesizes a cyclic dinucle ...

    Cyclic GMP-AMP synthase is essential for innate immunity against infection and cellular damage, serving as a sensor of DNA from pathogens or mislocalized self-DNA. Upon binding double-stranded DNA, cyclic GMP-AMP synthase synthesizes a cyclic dinucleotide that initiates an inflammatory cellular response. Mouse studies that recapitulate causative mutations in the autoimmune disease Aicardi-Goutières syndrome demonstrate that ablating the cyclic GMP-AMP synthase gene abolishes the deleterious phenotype. Here, we report the discovery of a class of cyclic GMP-AMP synthase inhibitors identified by a high-throughput screen. These compounds possess defined structure-activity relationships and we present crystal structures of cyclic GMP-AMP synthase, double-stranded DNA, and inhibitors within the enzymatic active site. We find that a chemically improved member, RU.521, is active and selective in cellular assays of cyclic GMP-AMP synthase-mediated signaling and reduces constitutive expression of interferon in macrophages from a mouse model of Aicardi-Goutières syndrome. RU.521 will be useful toward understanding the biological roles of cyclic GMP-AMP synthase and can serve as a molecular scaffold for development of future autoimmune therapies.Upon DNA binding cyclic GMP-AMP synthase (cGAS) produces a cyclic dinucleotide, which leads to the upregulation of inflammatory genes. Here the authors develop small molecule cGAS inhibitors, functionally characterize them and present the inhibitor and DNA bound cGAS crystal structures, which will facilitate drug development.


    Organizational Affiliation

    Vanderbilt University School of Medicine, Nashville, TN, 37027, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure


Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Cyclic GMP-AMP synthase
A
362Mus musculusGene Names: Mb21d1
EC: 2.7.7.86
Find proteins for Q8C6L5 (Mus musculus)
Go to UniProtKB:  Q8C6L5
Entity ID: 2
MoleculeChainsLengthOrganism
DNA (5'-D(*AP*AP*AP*TP*TP*GP*CP*CP*GP*AP*AP*GP*AP*CP*G)-3')E15Mus musculus
Entity ID: 3
MoleculeChainsLengthOrganism
DNA (5'-D(P*CP*GP*TP*CP*TP*TP*CP*GP*GP*CP*AP*AP*TP*T)-3')F14Mus musculus
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
ZN
Query on ZN

Download SDF File 
Download CCD File 
A
ZINC ION
Zn
PTFCDOFLOPIGGS-UHFFFAOYSA-N
 Ligand Interaction
AE7
Query on AE7

Download SDF File 
Download CCD File 
A
(3R)-3-[1-(3H-1lambda~4~,3-benzothiazol-2-yl)-5-hydroxy-3-methyl-1H-pyrazol-4-yl]-2-benzofuran-1(3H)-one
C19 H15 N3 O3 S
LVLUTBWXLVGTPI-MRXNPFEDSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.177 Å
  • R-Value Free: 0.281 
  • R-Value Work: 0.242 
  • Space Group: I 2 2 2
Unit Cell:
Length (Å)Angle (°)
a = 85.285α = 90.00
b = 98.633β = 90.00
c = 129.175γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PDB_EXTRACTdata extraction
PHENIXrefinement
XDSdata scaling
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2017-10-11
    Type: Initial release