4EF5

Crystal structure of STING CTD


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.227 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Structural analysis of the STING adaptor protein reveals a hydrophobic dimer interface and mode of cyclic di-GMP binding

Ouyang, S.Song, X.Wang, Y.Ru, H.Shaw, N.Jiang, Y.Niu, F.Zhu, Y.Qiu, W.Parvatiyar, K.Li, Y.Zhang, R.Cheng, G.Liu, Z.J.

(2012) Immunity 36: 1073-1086

  • DOI: 10.1016/j.immuni.2012.03.019
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • STING is an essential signaling molecule for DNA and cyclic di-GMP (c-di-GMP)-mediated type I interferon (IFN) production via TANK-binding kinase 1 (TBK1) and interferon regulatory factor 3 (IRF3) pathway. It contains an N-terminal transmembrane regi ...

    STING is an essential signaling molecule for DNA and cyclic di-GMP (c-di-GMP)-mediated type I interferon (IFN) production via TANK-binding kinase 1 (TBK1) and interferon regulatory factor 3 (IRF3) pathway. It contains an N-terminal transmembrane region and a cytosolic C-terminal domain (CTD). Here, we describe crystal structures of STING CTD alone and complexed with c-di-GMP in a unique binding mode. The strictly conserved aa 153-173 region was shown to be cytosolic and participated in dimerization via hydrophobic interactions. The STING CTD functions as a dimer and the dimerization was independent of posttranslational modifications. Binding of c-di-GMP enhanced interaction of a shorter construct of STING CTD (residues 139-344) with TBK1. This suggests an extra TBK1 binding site, other than serine 358. This study provides a glimpse into the unique architecture of STING and sheds light on the mechanism of c-di-GMP-mediated TBK1 signaling.


    Organizational Affiliation

    National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transmembrane protein 173
A
265Homo sapiensMutation(s): 0 
Gene Names: TMEM173 (ERIS, MITA, STING)
Find proteins for Q86WV6 (Homo sapiens)
Go to Gene View: TMEM173
Go to UniProtKB:  Q86WV6
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.45 Å
  • R-Value Free: 0.288 
  • R-Value Work: 0.227 
  • Space Group: C 2 2 21
Unit Cell:
Length (Å)Angle (°)
a = 81.041α = 90.00
b = 90.356β = 90.00
c = 73.315γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
PHASESphasing
HKL-2000data collection
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-05-16
    Type: Initial release
  • Version 1.1: 2012-05-23
    Type: Database references
  • Version 1.2: 2012-05-30
    Type: Database references
  • Version 1.3: 2013-07-03
    Type: Database references