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- EMDB-0505: Cryo-EM structure of full-length chicken STING in the cGAMP-bound... -

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Basic information

Entry
Database: EMDB / ID: EMD-0505
TitleCryo-EM structure of full-length chicken STING in the cGAMP-bound tetrameric state
Map dataprimary map
Sample
  • Complex: full-length chicken STING
    • Protein or peptide: Stimulator of interferon genes protein
  • Ligand: cGAMP
KeywordsER / membrane / adaptor / IMMUNE SYSTEM
Function / homology
Function and homology information


STING mediated induction of host immune responses / 2',3'-cyclic GMP-AMP binding / proton channel activity / cyclic-di-GMP binding / cGAS/STING signaling pathway / reticulophagy / protein complex oligomerization / positive regulation of type I interferon production / positive regulation of macroautophagy / autophagosome membrane ...STING mediated induction of host immune responses / 2',3'-cyclic GMP-AMP binding / proton channel activity / cyclic-di-GMP binding / cGAS/STING signaling pathway / reticulophagy / protein complex oligomerization / positive regulation of type I interferon production / positive regulation of macroautophagy / autophagosome membrane / autophagosome assembly / activation of innate immune response / endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of interferon-beta production / autophagosome / Neutrophil degranulation / cytoplasmic vesicle / defense response to virus / Golgi membrane / innate immune response / endoplasmic reticulum membrane / perinuclear region of cytoplasm / protein homodimerization activity / cytoplasm
Similarity search - Function
: / Stimulator of interferon genes protein / Stimulator of interferon genes protein, C-terminal domain superfamily / Transmembrane protein 173
Similarity search - Domain/homology
Stimulator of interferon genes protein / Stimulator of interferon genes protein
Similarity search - Component
Biological speciesGallus gallus (chicken)
Methodsingle particle reconstruction / cryo EM / Resolution: 6.5 Å
AuthorsShang G / Zhang C
Funding support United States, 6 items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)GM088197 United States
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)R35GM130289 United States
Howard Hughes Medical Institute (HHMI) United States
Welch FoundationI-1389 United States
Welch FoundationI-1702 United States
Welch FoundationI-1944 United States
CitationJournal: Nature / Year: 2019
Title: Cryo-EM structures of STING reveal its mechanism of activation by cyclic GMP-AMP.
Authors: Guijun Shang / Conggang Zhang / Zhijian J Chen / Xiao-Chen Bai / Xuewu Zhang /
Abstract: Infections by pathogens that contain DNA trigger the production of type-I interferons and inflammatory cytokines through cyclic GMP-AMP synthase, which produces 2'3'-cyclic GMP-AMP (cGAMP) that binds ...Infections by pathogens that contain DNA trigger the production of type-I interferons and inflammatory cytokines through cyclic GMP-AMP synthase, which produces 2'3'-cyclic GMP-AMP (cGAMP) that binds to and activates stimulator of interferon genes (STING; also known as TMEM173, MITA, ERIS and MPYS). STING is an endoplasmic-reticulum membrane protein that contains four transmembrane helices followed by a cytoplasmic ligand-binding and signalling domain. The cytoplasmic domain of STING forms a dimer, which undergoes a conformational change upon binding to cGAMP. However, it remains unclear how this conformational change leads to STING activation. Here we present cryo-electron microscopy structures of full-length STING from human and chicken in the inactive dimeric state (about 80 kDa in size), as well as cGAMP-bound chicken STING in both the dimeric and tetrameric states. The structures show that the transmembrane and cytoplasmic regions interact to form an integrated, domain-swapped dimeric assembly. Closure of the ligand-binding domain, induced by cGAMP, leads to a 180° rotation of the ligand-binding domain relative to the transmembrane domain. This rotation is coupled to a conformational change in a loop on the side of the ligand-binding-domain dimer, which leads to the formation of the STING tetramer and higher-order oligomers through side-by-side packing. This model of STING oligomerization and activation is supported by our structure-based mutational analyses.
History
DepositionJan 28, 2019-
Header (metadata) releaseMar 6, 2019-
Map releaseMar 6, 2019-
UpdateMar 20, 2024-
Current statusMar 20, 2024Processing site: RCSB / Status: Released

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Structure visualization

Movie
  • Surface view with section colored by density value
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view colored by cylindrical radius
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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  • Surface view with fitted model
  • Atomic models: PDB-6nt8
  • Surface level: 0.015
  • Imaged by UCSF Chimera
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Movie viewer
Structure viewerEM map:
SurfViewMolmilJmol/JSmol
Supplemental images

emd_0505.png

Downloads & links

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Map

FileDownload / File: emd_0505.map.gz / Format: CCP4 / Size: 38.4 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
Annotationprimary map
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.84 Å/pix.
x 216 pix.
= 181.44 Å		0.84 Å/pix.
x 216 pix.
= 181.44 Å		0.84 Å/pix.
x 216 pix.
= 181.44 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.84 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.015 / Movie #1: 0.015
Minimum - Maximum-0.015100539 - 0.03823336
Average (Standard dev.)0.0007007503 (±0.0032038286)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions216216216
Spacing216216216
CellA=B=C: 181.43999 Å
α=β=γ: 90.0 °

CCP4 map header:

modeImage stored as Reals
Å/pix. X/Y/Z0.840.840.84
M x/y/z216216216
origin x/y/z0.0000.0000.000
length x/y/z181.440181.440181.440
α/β/γ90.00090.00090.000
MAP C/R/S123
start NC/NR/NS000
NC/NR/NS216216216
D min/max/mean-0.0150.0380.001

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Supplemental data

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Sample components

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Entire : full-length chicken STING

EntireName: full-length chicken STING
Components
  • Complex: full-length chicken STING
    • Protein or peptide: Stimulator of interferon genes protein
  • Ligand: cGAMP

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Supramolecule #1: full-length chicken STING

SupramoleculeName: full-length chicken STING / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1
Source (natural)Organism: Gallus gallus (chicken)

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Macromolecule #1: Stimulator of interferon genes protein

MacromoleculeName: Stimulator of interferon genes protein / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO
Source (natural)Organism: Gallus gallus (chicken)
Molecular weightTheoretical: 44.20707 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: MPQDPSTRSS PARLLIPEPR AGRARHAACV LLAVCFVVLF LSGEPLAPII RSVCTQLAAL QLGVLLKGCC CLAEEIFHLH SRHHGSLWQ VLCSCFPPRW YLALLLVGGS AYLDPPEDNG HSPRLALTLS CLCQLLVLAL GLQKLSAVEV SELTESSKKN V AHGLAWSY ...String:
MPQDPSTRSS PARLLIPEPR AGRARHAACV LLAVCFVVLF LSGEPLAPII RSVCTQLAAL QLGVLLKGCC CLAEEIFHLH SRHHGSLWQ VLCSCFPPRW YLALLLVGGS AYLDPPEDNG HSPRLALTLS CLCQLLVLAL GLQKLSAVEV SELTESSKKN V AHGLAWSY YIGYLKVVLP RLKECMEELS RTNPMLRAHR DTWKLHILVP LGCDIWDDLE KADSNIQYLA DLPETILTRA GI KRRVYKH SLYVIRDKDN KLRPCVLEFA SPLQTLCAMS QDDCAAFSRE QRLEQARLFY RSLRDILGSS KECAGLYRLI AYE EPAEPE SHFLSGLILW HLQQQQREEY MVQEELPLGT SSVELSLQVS SSDLPQPLRS DCPGIHRPDY KDDDDK

UniProtKB: Stimulator of interferon genes protein

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Macromolecule #2: cGAMP

MacromoleculeName: cGAMP / type: ligand / ID: 2 / Number of copies: 2 / Formula: 1SY
Molecular weightTheoretical: 674.411 Da
Chemical component information

ChemComp-1SY:
cGAMP

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Experimental details

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Structure determination

Methodcryo EM
Processingsingle particle reconstruction
Aggregation stateparticle

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Sample preparation

Concentration4.5 mg/mL
BufferpH: 8
GridPretreatment - Type: GLOW DISCHARGE / Details: unspecified
VitrificationCryogen name: ETHANE

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Electron microscopy

MicroscopeFEI TITAN KRIOS
Image recordingFilm or detector model: GATAN K2 SUMMIT (4k x 4k) / Detector mode: SUPER-RESOLUTION / Average electron dose: 40.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsIllumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD
Sample stageSpecimen holder model: FEI TITAN KRIOS AUTOGRID HOLDER / Cooling holder cryogen: NITROGEN
Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company

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Image processing

Startup modelType of model: OTHER / Details: Stochastic Gradient Descent
Final reconstructionApplied symmetry - Point group: C1 (asymmetric) / Resolution.type: BY AUTHOR / Resolution: 6.5 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: RELION / Number images used: 41033
Initial angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
Final angle assignmentType: MAXIMUM LIKELIHOOD / Software - Name: RELION
FSC plot (resolution estimation)

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Atomic model buiding 1

RefinementSpace: REAL / Protocol: RIGID BODY FIT
Output model

PDB-6nt8:
Cryo-EM structure of full-length chicken STING in the cGAMP-bound tetrameric state

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