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- EMDB-25142: Human STING bound to both cGAMP and 1-[(2-chloro-6-fluorophenyl)m... -
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Open data
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Basic information
Entry | Database: EMDB / ID: EMD-25142 | |||||||||||||||||||||
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Title | Human STING bound to both cGAMP and 1-[(2-chloro-6-fluorophenyl)methyl]-3,3-dimethyl-2-oxo-N-[(2,4,6-trifluorophenyl)methyl]-2,3-dihydro-1H-indole-6-carboxamide (Compound 53) | |||||||||||||||||||||
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![]() | Sting / agonist / activate conformation / oligomer / IMMUNE SYSTEM | |||||||||||||||||||||
Function / homology | ![]() STING complex / STAT6-mediated induction of chemokines / protein localization to endoplasmic reticulum / serine/threonine protein kinase complex / proton channel activity / 2',3'-cyclic GMP-AMP binding / STING mediated induction of host immune responses / cyclic-di-GMP binding / IRF3-mediated induction of type I IFN / positive regulation of type I interferon-mediated signaling pathway ...STING complex / STAT6-mediated induction of chemokines / protein localization to endoplasmic reticulum / serine/threonine protein kinase complex / proton channel activity / 2',3'-cyclic GMP-AMP binding / STING mediated induction of host immune responses / cyclic-di-GMP binding / IRF3-mediated induction of type I IFN / positive regulation of type I interferon-mediated signaling pathway / cGAS/STING signaling pathway / reticulophagy / pattern recognition receptor signaling pathway / cytoplasmic pattern recognition receptor signaling pathway / cellular response to exogenous dsRNA / autophagosome membrane / antiviral innate immune response / positive regulation of macroautophagy / cellular response to organic cyclic compound / autophagosome assembly / autophagosome / positive regulation of type I interferon production / cellular response to interferon-beta / signaling adaptor activity / positive regulation of defense response to virus by host / activation of innate immune response / Regulation of innate immune responses to cytosolic DNA / positive regulation of interferon-beta production / endoplasmic reticulum-Golgi intermediate compartment membrane / secretory granule membrane / cytoplasmic vesicle membrane / positive regulation of DNA-binding transcription factor activity / peroxisome / SARS-CoV-1 activates/modulates innate immune responses / positive regulation of protein binding / protein complex oligomerization / regulation of inflammatory response / defense response to virus / RNA polymerase II-specific DNA-binding transcription factor binding / mitochondrial outer membrane / endosome / Golgi membrane / innate immune response / ubiquitin protein ligase binding / Neutrophil degranulation / endoplasmic reticulum membrane / protein kinase binding / SARS-CoV-2 activates/modulates innate and adaptive immune responses / perinuclear region of cytoplasm / protein homodimerization activity / positive regulation of transcription by RNA polymerase II / nucleoplasm / identical protein binding / plasma membrane / cytosol Similarity search - Function | |||||||||||||||||||||
Biological species | ![]() | |||||||||||||||||||||
Method | single particle reconstruction / cryo EM / Resolution: 3.45 Å | |||||||||||||||||||||
![]() | Lu D / Shang G | |||||||||||||||||||||
Funding support | ![]()
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![]() | ![]() Title: Activation of STING by targeting a pocket in the transmembrane domain. Authors: Defen Lu / Guijun Shang / Jie Li / Yong Lu / Xiao-Chen Bai / Xuewu Zhang / ![]() Abstract: Stimulator of interferon genes (STING) is an adaptor protein in innate immunity against DNA viruses or bacteria. STING-mediated immunity could be exploited in the development of vaccines or cancer ...Stimulator of interferon genes (STING) is an adaptor protein in innate immunity against DNA viruses or bacteria. STING-mediated immunity could be exploited in the development of vaccines or cancer immunotherapies. STING is a transmembrane dimeric protein that is located in the endoplasmic reticulum or in the Golgi apparatus. STING is activated by the binding of its cytoplasmic ligand-binding domain to cyclic dinucleotides that are produced by the DNA sensor cyclic GMP-AMP (cGAMP) synthase or by invading bacteria. Cyclic dinucleotides induce a conformational change in the STING ligand-binding domain, which leads to a high-order oligomerization of STING that is essential for triggering the downstream signalling pathways. However, the cGAMP-induced STING oligomers tend to dissociate in solution and have not been resolved to high resolution, which limits our understanding of the activation mechanism. Here we show that a small-molecule agonist, compound 53 (C53), promotes the oligomerization and activation of human STING through a mechanism orthogonal to that of cGAMP. We determined a cryo-electron microscopy structure of STING bound to both C53 and cGAMP, revealing a stable oligomer that is formed by side-by-side packing and has a curled overall shape. Notably, C53 binds to a cryptic pocket in the STING transmembrane domain, between the two subunits of the STING dimer. This binding triggers outward shifts of transmembrane helices in the dimer, and induces inter-dimer interactions between these helices to mediate the formation of the high-order oligomer. Our functional analyses show that cGAMP and C53 together induce stronger activation of STING than either ligand alone. | |||||||||||||||||||||
History |
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Structure visualization
Movie |
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Structure viewer | EM map: ![]() ![]() ![]() |
Supplemental images |
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Downloads & links
-EMDB archive
Map data | ![]() | 14.1 MB | ![]() | |
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Header (meta data) | ![]() ![]() | 11.8 KB 11.8 KB | Display Display | ![]() |
FSC (resolution estimation) | ![]() | 5.8 KB | Display | ![]() |
Images | ![]() | 120 KB | ||
Filedesc metadata | ![]() | 5.4 KB | ||
Archive directory | ![]() ![]() | HTTPS FTP |
-Validation report
Summary document | ![]() | 551.9 KB | Display | ![]() |
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Full document | ![]() | 551.5 KB | Display | |
Data in XML | ![]() | 8.6 KB | Display | |
Data in CIF | ![]() | 10.9 KB | Display | |
Arichive directory | ![]() ![]() | HTTPS FTP |
-Related structure data
Related structure data | ![]() 7siiMC M: atomic model generated by this map C: citing same article ( |
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Similar structure data |
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Links
EMDB pages | ![]() ![]() |
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Related items in Molecule of the Month |
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Map
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Voxel size | X=Y=Z: 1.08 Å | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Density |
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Symmetry | Space group: 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Details | EMDB XML:
CCP4 map header:
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-Supplemental data
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Sample components
-Entire : human STING
Entire | Name: human STING |
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Components |
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-Supramolecule #1: human STING
Supramolecule | Name: human STING / type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1 |
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Source (natural) | Organism: ![]() |
-Macromolecule #1: Stimulator of interferon genes protein
Macromolecule | Name: Stimulator of interferon genes protein / type: protein_or_peptide / ID: 1 / Number of copies: 4 / Enantiomer: LEVO |
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Source (natural) | Organism: ![]() |
Molecular weight | Theoretical: 39.553398 KDa |
Recombinant expression | Organism: ![]() |
Sequence | String: MPHSSLHPSI PCPRGHGAQK AALVLLSACL VTLWGLGEPP EHTLRYLVLH LASLQLGLLL NGVCSLAEEL RHIHSRYRGS YWRTVRACL GCPLRRGALL LLSIYFYYSL PNAVGPPFTW MLALLGLSQA LNILLGLKGL APAEISAVCE KGNFNVAHGL A WSYYIGYL ...String: MPHSSLHPSI PCPRGHGAQK AALVLLSACL VTLWGLGEPP EHTLRYLVLH LASLQLGLLL NGVCSLAEEL RHIHSRYRGS YWRTVRACL GCPLRRGALL LLSIYFYYSL PNAVGPPFTW MLALLGLSQA LNILLGLKGL APAEISAVCE KGNFNVAHGL A WSYYIGYL RLILPELQAR IRTYNQHYNN LLRGAVSQRL YILLPLDCGV PDNLSMADPN IRFLDKLPQQ TGDRAGIKDR VY SNSIYEL LENGQRAGTC VLEYATPLQT LFAMSQYSQA GFSREDRLEQ AKLFCRTLED ILADAPESQN NCRLIAYQEP ADD SSFSLS QEVLRHLRQE EKEEVTVGTS SGLEVLFQ UniProtKB: Stimulator of interferon genes protein |
-Macromolecule #2: 1-[(2-chloro-6-fluorophenyl)methyl]-3,3-dimethyl-2-oxo-N-[(2,4,6-...
Macromolecule | Name: 1-[(2-chloro-6-fluorophenyl)methyl]-3,3-dimethyl-2-oxo-N-[(2,4,6-trifluorophenyl)methyl]-2,3-dihydro-1H-indole-6-carboxamide type: ligand / ID: 2 / Number of copies: 2 / Formula: 9IM |
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Molecular weight | Theoretical: 490.877 Da |
Chemical component information | ![]() ChemComp-9IM: |
-Macromolecule #3: cGAMP
Macromolecule | Name: cGAMP / type: ligand / ID: 3 / Number of copies: 2 / Formula: 1SY |
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Molecular weight | Theoretical: 674.411 Da |
Chemical component information | ![]() ChemComp-1SY: |
-Experimental details
-Structure determination
Method | cryo EM |
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![]() | single particle reconstruction |
Aggregation state | particle |
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Sample preparation
Buffer | pH: 7.5 |
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Vitrification | Cryogen name: NITROGEN |
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Electron microscopy
Microscope | FEI TITAN KRIOS |
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Image recording | Film or detector model: GATAN K3 BIOQUANTUM (6k x 4k) / Average electron dose: 50.0 e/Å2 |
Electron beam | Acceleration voltage: 300 kV / Electron source: ![]() |
Electron optics | Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD |
Experimental equipment | ![]() Model: Titan Krios / Image courtesy: FEI Company |
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Image processing
-Atomic model buiding 1
Refinement | Space: REAL / Protocol: AB INITIO MODEL |
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Output model | ![]() PDB-7sii: |