5CFR

Crystal structure of anemone STING (Nematostella vectensis) in apo 'unrotated' closed conformation


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.257 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Ancient Origin of cGAS-STING Reveals Mechanism of Universal 2',3' cGAMP Signaling.

Kranzusch, P.J.Wilson, S.C.Lee, A.S.Berger, J.M.Doudna, J.A.Vance, R.E.

(2015) Mol.Cell 59: 891-903

  • DOI: 10.1016/j.molcel.2015.07.022
  • Primary Citation of Related Structures:  5CFL, 5CFM, 5CFN, 5CFO, 5CFP, 5CFQ

  • PubMed Abstract: 
  • In humans, the cGAS-STING immunity pathway signals in response to cytosolic DNA via 2',3' cGAMP, a cyclic dinucleotide (CDN) second messenger containing mixed 2'-5' and 3'-5' phosphodiester bonds. Prokaryotes also produce CDNs, but these are exclusiv ...

    In humans, the cGAS-STING immunity pathway signals in response to cytosolic DNA via 2',3' cGAMP, a cyclic dinucleotide (CDN) second messenger containing mixed 2'-5' and 3'-5' phosphodiester bonds. Prokaryotes also produce CDNs, but these are exclusively 3' linked, and thus the evolutionary origins of human 2',3' cGAMP signaling are unknown. Here we illuminate the ancient origins of human cGAMP signaling by discovery of a functional cGAS-STING pathway in Nematostella vectensis, an anemone species >500 million years diverged from humans. Anemone cGAS appears to produce a 3',3' CDN that anemone STING recognizes through nucleobase-specific contacts not observed in human STING. Nevertheless, anemone STING binds mixed-linkage 2',3' cGAMP indistinguishably from human STING, trapping a unique structural conformation not induced by 3',3' CDNs. These results reveal that human mixed-linkage cGAMP achieves universal signaling by exploiting a deeply conserved STING conformational intermediate, providing critical insight for therapeutic targeting of the STING pathway.


    Organizational Affiliation

    Department of Molecular & Cell Biology, University of California, Berkeley, CA 94720, USA; Howard Hughes Medical Institute (HHMI), University of California, Berkeley, CA 94720, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Stimulator of Interferon Genes
A, B
202Nematostella vectensisN/A
Find proteins for A7SLZ2 (Nematostella vectensis)
Go to UniProtKB:  A7SLZ2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A, B
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.85 Å
  • R-Value Free: 0.278 
  • R-Value Work: 0.257 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 43.043α = 90.00
b = 43.037β = 90.00
c = 170.942γ = 90.00
Software Package:
Software NamePurpose
PHENIXrefinement
Aimlessdata scaling
XDSdata reduction
PHASERphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationCountryGrant Number
Howard Hughes Medical InstituteUnited States--
National Institutes of Health/National Institute Of Allergy and Infectious DiseasesUnited StatesAI063302

Revision History 

  • Version 1.0: 2015-08-26
    Type: Initial release
  • Version 1.1: 2015-09-09
    Type: Database references
  • Version 1.2: 2015-09-30
    Type: Database references
  • Version 1.3: 2017-09-27
    Type: Author supporting evidence, Database references, Derived calculations