6WT8

Structure of a STING-associated CdnE c-di-GMP synthase from Flavobacteriaceae sp.


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

STING cyclic dinucleotide sensing originated in bacteria.

Morehouse, B.R.Govande, A.A.Millman, A.Keszei, A.F.A.Lowey, B.Ofir, G.Shao, S.Sorek, R.Kranzusch, P.J.

(2020) Nature 586: 429-433

  • DOI: 10.1038/s41586-020-2719-5
  • Primary Citation of Related Structures:  
    6WT4, 6WT5, 6WT6, 6WT7, 6WT8, 6WT9

  • PubMed Abstract: 
  • Stimulator of interferon genes (STING) is a receptor in human cells that senses foreign cyclic dinucleotides that are released during bacterial infection and in endogenous cyclic GMP-AMP signalling during viral infection and anti-tumour immunity 1-5 ...

    Stimulator of interferon genes (STING) is a receptor in human cells that senses foreign cyclic dinucleotides that are released during bacterial infection and in endogenous cyclic GMP-AMP signalling during viral infection and anti-tumour immunity 1-5 . STING shares no structural homology with other known signalling proteins 6-9 , which has limited attempts at functional analysis and prevented explanation of the origin of cyclic dinucleotide signalling in mammalian innate immunity. Here we reveal functional STING homologues encoded within prokaryotic defence islands, as well as a conserved mechanism of signal activation. Crystal structures of bacterial STING define a minimal homodimeric scaffold that selectively responds to cyclic di-GMP synthesized by a neighbouring cGAS/DncV-like nucleotidyltransferase (CD-NTase) enzyme. Bacterial STING domains couple the recognition of cyclic dinucleotides with the formation of protein filaments to drive oligomerization of TIR effector domains and rapid NAD + cleavage. We reconstruct the evolutionary events that followed the acquisition of STING into metazoan innate immunity, and determine the structure of a full-length TIR-STING fusion from the Pacific oyster Crassostrea gigas. Comparative structural analysis demonstrates how metazoan-specific additions to the core STING scaffold enabled a switch from direct effector function to regulation of antiviral transcription. Together, our results explain the mechanism of STING-dependent signalling and reveal the conservation of a functional cGAS-STING pathway in prokaryotic defence against bacteriophages.


    Organizational Affiliation

    Parker Institute for Cancer Immunotherapy, Dana-Farber Cancer Institute, Boston, MA, USA. philip_kranzusch@dfci.harvard.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
STING-associated CdnE c-di-GMP synthaseA365FlavobacteriaceaeMutation(s): 0 
EC: 2.7.7.65
UniProt
Find proteins for P0DUE2 (Flavobacteriaceae sp. genome_bin_11)
Explore P0DUE2 
Go to UniProtKB:  P0DUE2
Protein Feature View
Expand
  • Reference Sequence
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
AL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.52 Å
  • R-Value Free: 0.188 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.169 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.181α = 90
b = 78.1β = 90
c = 111.105γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
AutoSolphasing

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2020-09-09
    Type: Initial release
  • Version 1.1: 2020-09-16
    Changes: Database references, Source and taxonomy, Structure summary
  • Version 1.2: 2020-10-28
    Changes: Database references