4KC0

mSTING


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.194 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Novel c-di-GMP recognition modes of the mouse innate immune adaptor protein STING

Chin, K.H.Tu, Z.L.Su, Y.C.Yu, Y.J.Chen, H.C.Lo, Y.C.Chen, C.P.Barber, G.N.Chuah, M.L.Liang, Z.X.Chou, S.H.

(2013) Acta Crystallogr.,Sect.D 69: 352-366

  • DOI: 10.1107/S0907444912047269
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The mammalian ER protein STING (stimulator of interferon genes; also known as MITA, ERIS, MPYS or TMEM173) is an adaptor protein that links the detection of cytosolic dsDNA to the activation of TANK-binding kinase 1 (TBK1) and its downstream transcri ...

    The mammalian ER protein STING (stimulator of interferon genes; also known as MITA, ERIS, MPYS or TMEM173) is an adaptor protein that links the detection of cytosolic dsDNA to the activation of TANK-binding kinase 1 (TBK1) and its downstream transcription factor interferon regulatory factor 3 (IFN3). Recently, STING itself has been found to be the direct receptor of bacterial c-di-GMP, and crystal structures of several human STING C-terminal domain (STING-CTD) dimers in the apo form or in complex with c-di-GMP have been published. Here, a novel set of structures of mouse STING-CTD (mSTING(137-344)) in apo and complex forms determined from crystals obtained under different crystallization conditions are reported. These novel closed-form structures exhibited considerable differences from previously reported open-form human STING-CTD structures. The novel mSTING structures feature extensive interactions between the two monomers, a unique asymmetric c-di-GMP molecule with one guanine base in an unusual syn conformation that is well accommodated in the dimeric interface with many direct specific interactions and two unexpected equivalent secondary peripheral c-di-GMP binding sites. Replacement of the amino acids crucial for specific c-di-GMP binding in mSTING significantly changes the ITC titration profiles and reduces the IFN-β reporter luciferase activity. Taken together, these results reveal a more stable c-di-GMP binding mode of STING proteins that could serve as a template for rational drug design to stimulate interferon production by mammalian cells.


    Organizational Affiliation

    Agricultural Biotechnology Center, National Chung Hsing University, Taichung 40227, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Stimulator of interferon genes protein
A, B
207Mus musculusMutation(s): 0 
Gene Names: Tmem173 (Eris Mita, Mpys, Sting)
Find proteins for Q3TBT3 (Mus musculus)
Go to UniProtKB:  Q3TBT3
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.2 Å
  • R-Value Free: 0.251 
  • R-Value Work: 0.194 
  • Space Group: P 31
Unit Cell:
Length (Å)Angle (°)
a = 78.493α = 90.00
b = 78.493β = 90.00
c = 50.409γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data scaling
HKL-2000data reduction
CNSrefinement
PHENIXrefinement
HKL-2000data collection
CNSphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-05-29
    Type: Initial release