4LOJ

Crystal structure of mSting in complex with c[G(2',5')pA(3',5')p]


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.191 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structure-Function Analysis of STING Activation by c[G(2',5')pA(3',5')p] and Targeting by Antiviral DMXAA.

Gao, P.Ascano, M.Zillinger, T.Wang, W.Dai, P.Serganov, A.A.Gaffney, B.L.Shuman, S.Jones, R.A.Deng, L.Hartmann, G.Barchet, W.Tuschl, T.Patel, D.J.

(2013) Cell 154: 748-762

  • DOI: 10.1016/j.cell.2013.07.023
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Binding of dsDNA by cyclic GMP-AMP (cGAMP) synthase (cGAS) triggers formation of the metazoan second messenger c[G(2',5')pA(3',5')p], which binds the signaling protein STING with subsequent activation of the interferon (IFN) pathway. We show that hum ...

    Binding of dsDNA by cyclic GMP-AMP (cGAMP) synthase (cGAS) triggers formation of the metazoan second messenger c[G(2',5')pA(3',5')p], which binds the signaling protein STING with subsequent activation of the interferon (IFN) pathway. We show that human hSTING(H232) adopts a "closed" conformation upon binding c[G(2',5')pA(3',5')p] and its linkage isomer c[G(2',5')pA(2',5')p], as does mouse mSting(R231) on binding c[G(2',5')pA(3',5')p], c[G(3',5')pA(3',5')p] and the antiviral agent DMXAA, leading to similar "closed" conformations. Comparing hSTING to mSting, 2',5'-linkage-containing cGAMP isomers were more specific triggers of the IFN pathway compared to the all-3',5'-linkage isomer. Guided by structural information, we identified a unique point mutation (S162A) placed within the cyclic-dinucleotide-binding site of hSTING that rendered it sensitive to the otherwise mouse-specific drug DMXAA, a conclusion validated by binding studies. Our structural and functional analysis highlights the unexpected versatility of STING in the recognition of natural and synthetic ligands within a small-molecule pocket created by the dimerization of STING.


    Organizational Affiliation

    Structural Biology Program, Memorial Sloan-Kettering Cancer Center, New York, NY 10065, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Stimulator of interferon genes protein
A, B
188Mus musculusMutation(s): 0 
Gene Names: Tmem173 (Eris Mita, Mpys, Sting)
Find proteins for Q3TBT3 (Mus musculus)
Go to UniProtKB:  Q3TBT3
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
1SY
Query on 1SY

Download SDF File 
Download CCD File 
B
cGAMP
2',3' cGAMP, c-GMP-AMP, c[G(2',5')pA(3',5')p]
C20 H24 N10 O13 P2
XRILCFTWUCUKJR-INFSMZHSSA-N
 Ligand Interaction
External Ligand Annotations 
IDBinding Affinity (Sequence Identity %)
1SYKd: 300 nM PDBBIND
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.77 Å
  • R-Value Free: 0.212 
  • R-Value Work: 0.191 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.170α = 90.00
b = 46.480β = 90.00
c = 157.930γ = 90.00
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
HKL-2000data scaling
HKL-2000data reduction
REFMACrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-07-12 
  • Released Date: 2013-08-14 
  • Deposition Author(s): Gao, P., Patel, D.J.

Revision History 

  • Version 1.0: 2013-08-14
    Type: Initial release
  • Version 1.1: 2013-10-02
    Type: Database references
  • Version 1.2: 2015-08-05
    Type: Non-polymer description