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- PDB-9ku4: Cryo-EM structure of E373A mutant RIG-I with 5'p-RNA -

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Basic information

Entry
Database: PDB / ID: 9ku4
TitleCryo-EM structure of E373A mutant RIG-I with 5'p-RNA
Components
  • Antiviral innate immune response receptor RIG-I
  • RNA (60-MER)
KeywordsIMMUNE SYSTEM / RNA recognition / RNA helicase / ATP hydrolysis / RLR signaling
Function / homology
Function and homology information


regulation of type III interferon production / RIG-I signaling pathway / positive regulation of myeloid dendritic cell cytokine production / OAS antiviral response / detection of virus / positive regulation of response to cytokine stimulus / NF-kB activation through FADD/RIP-1 pathway mediated by caspase-8 and -10 / positive regulation of granulocyte macrophage colony-stimulating factor production / Modulation of host responses by IFN-stimulated genes / TRAF6 mediated IRF7 activation ...regulation of type III interferon production / RIG-I signaling pathway / positive regulation of myeloid dendritic cell cytokine production / OAS antiviral response / detection of virus / positive regulation of response to cytokine stimulus / NF-kB activation through FADD/RIP-1 pathway mediated by caspase-8 and -10 / positive regulation of granulocyte macrophage colony-stimulating factor production / Modulation of host responses by IFN-stimulated genes / TRAF6 mediated IRF7 activation / cytoplasmic pattern recognition receptor signaling pathway / pattern recognition receptor activity / cellular response to exogenous dsRNA / RSV-host interactions / response to exogenous dsRNA / TRAF6 mediated NF-kB activation / positive regulation of interferon-alpha production / bicellular tight junction / positive regulation of defense response to virus by host / antiviral innate immune response / positive regulation of interferon-beta production / regulation of cell migration / positive regulation of interleukin-8 production / Negative regulators of DDX58/IFIH1 signaling / DDX58/IFIH1-mediated induction of interferon-alpha/beta / Evasion by RSV of host interferon responses / positive regulation of interleukin-6 production / ISG15 antiviral mechanism / response to virus / ruffle membrane / positive regulation of tumor necrosis factor production / SARS-CoV-1 activates/modulates innate immune responses / Ovarian tumor domain proteases / actin cytoskeleton / double-stranded RNA binding / TRAF3-dependent IRF activation pathway / double-stranded DNA binding / defense response to virus / gene expression / RNA helicase activity / single-stranded RNA binding / Ub-specific processing proteases / RNA helicase / ribonucleoprotein complex / innate immune response / ubiquitin protein ligase binding / positive regulation of gene expression / GTP binding / SARS-CoV-2 activates/modulates innate and adaptive immune responses / positive regulation of transcription by RNA polymerase II / ATP hydrolysis activity / zinc ion binding / ATP binding / identical protein binding / cytosol / cytoplasm
Similarity search - Function
RIG-I, CARD domain repeat 2 / RIG-I-like receptor, C-terminal / RIG-I receptor C-terminal domain / RIG-I-like receptor, C-terminal regulatory domain / RIG-I-like receptor, C-terminal domain superfamily / : / C-terminal domain of RIG-I / RIG-I-like receptor (RLR) C-terminal regulatory (CTR) domain profile. / Caspase recruitment domain / Caspase recruitment domain ...RIG-I, CARD domain repeat 2 / RIG-I-like receptor, C-terminal / RIG-I receptor C-terminal domain / RIG-I-like receptor, C-terminal regulatory domain / RIG-I-like receptor, C-terminal domain superfamily / : / C-terminal domain of RIG-I / RIG-I-like receptor (RLR) C-terminal regulatory (CTR) domain profile. / Caspase recruitment domain / Caspase recruitment domain / Death-like domain superfamily / DEAD/DEAH box helicase domain / DEAD/DEAH box helicase / Helicase conserved C-terminal domain / helicase superfamily c-terminal domain / Superfamilies 1 and 2 helicase C-terminal domain profile. / Superfamilies 1 and 2 helicase ATP-binding type-1 domain profile. / DEAD-like helicases superfamily / Helicase, C-terminal / Helicase superfamily 1/2, ATP-binding domain / P-loop containing nucleoside triphosphate hydrolase
Similarity search - Domain/homology
RNA / RNA (> 10) / Antiviral innate immune response receptor RIG-I
Similarity search - Component
Biological speciesHomo sapiens (human)
synthetic construct (others)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 2.4 Å
AuthorsTan, Y.B. / Luo, D.
Funding support Singapore, 1items
OrganizationGrant numberCountry
Ministry of Education (MoE, Singapore)MOE AcRF Tier 1 award RT22/23 Singapore
CitationJournal: To Be Published
Title: Cryo-EM structure of E373A mutant RIG-I with 5'p-RNA
Authors: Tan, Y.B. / Luo, D.
History
DepositionDec 3, 2024Deposition site: PDBJ / Processing site: PDBJ
Revision 1.0Dec 3, 2025Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Dec 3, 2025Data content type: Primary map / Data content type: Primary map / Provider: repository / Type: Initial release

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Structure visualization

Structure viewerMolecule:
MolmilJmol/JSmol

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Assembly

Deposited unit
B: Antiviral innate immune response receptor RIG-I
C: RNA (60-MER)
hetero molecules


Theoretical massNumber of molelcules
Total (without water)125,9903
Polymers125,9252
Non-polymers651
Water00
1


  • Idetical with deposited unit
  • defined by author
  • Evidence: electron microscopy, not applicable
TypeNameSymmetry operationNumber
identity operation1_5551

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Components

#1: Protein Antiviral innate immune response receptor RIG-I / ATP-dependent RNA helicase DDX58 / DEAD box protein 58 / RIG-I-like receptor 1 / RLR-1 / RNA sensor ...ATP-dependent RNA helicase DDX58 / DEAD box protein 58 / RIG-I-like receptor 1 / RLR-1 / RNA sensor RIG-I / Retinoic acid-inducible gene 1 protein / RIG-1 / Retinoic acid-inducible gene I protein / RIG-I


Mass: 106682.523 Da / Num. of mol.: 1 / Mutation: E373A
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: RIGI, DDX58 / Production host: Escherichia coli (E. coli) / References: UniProt: O95786, RNA helicase
#2: RNA chain RNA (60-MER)


Mass: 19242.414 Da / Num. of mol.: 1 / Source method: obtained synthetically / Source: (synth.) synthetic construct (others)
#3: Chemical ChemComp-ZN / ZINC ION


Mass: 65.409 Da / Num. of mol.: 1 / Source method: obtained synthetically / Formula: Zn / Feature type: SUBJECT OF INVESTIGATION
Has ligand of interestY
Has protein modificationN

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Experimental details

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Experiment

ExperimentMethod: ELECTRON MICROSCOPY
EM experimentAggregation state: PARTICLE / 3D reconstruction method: single particle reconstruction

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Sample preparation

Component
IDNameTypeDetailsEntity IDParent-IDSource
1RIG-I E373A mutant protein with 5'p-RNACOMPLEXRIG-I E373A mutant protein bind internally to the stem region of 5'p-RNA, providing insights to immune regulation.#1-#20MULTIPLE SOURCES
2RIG-ICOMPLEX#11RECOMBINANT
35'p-RNACOMPLEX#21SYNTHETIC
Molecular weightValue: 0.1066 MDa / Experimental value: NO
Source (natural)
IDEntity assembly-IDOrganismNcbi tax-ID
22Homo sapiens (human)9606
33synthetic construct (others)32630
Source (recombinant)Organism: Escherichia coli (E. coli)
Buffer solutionpH: 7.4 / Details: 25mM HEPES, 150mM NaCl
Buffer component
IDConc.NameFormulaBuffer-ID
125 mMHEPESHEPES1
2150 mMsodium chlorideNaCl1
SpecimenConc.: 2 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
VitrificationInstrument: FEI VITROBOT MARK III / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 283.15 K

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Electron microscopy imaging

Experimental equipment
Model: Titan Krios / Image courtesy: FEI Company
MicroscopyModel: TFS KRIOS
Electron gunElectron source: FIELD EMISSION GUN / Accelerating voltage: 300 kV / Illumination mode: FLOOD BEAM
Electron lensMode: BRIGHT FIELD / Nominal defocus max: 1600 nm / Nominal defocus min: 400 nm
Image recordingElectron dose: 50 e/Å2 / Film or detector model: TFS FALCON 4i (4k x 4k)

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Processing

EM software
IDNameVersionCategory
1Topazparticle selection
2cryoSPARCparticle selection
3EPUimage acquisition
5cryoSPARCCTF correction
8UCSF ChimeraXmodel fitting
10cryoSPARCinitial Euler assignment
11cryoSPARCfinal Euler assignment
12cryoSPARCclassification
13cryoSPARC3D reconstruction
14PHENIX1.20.1_4487:model refinement
15Cootmodel refinement
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Particle selectionNum. of particles selected: 2897164 / Details: topaz train/extract
SymmetryPoint symmetry: C1 (asymmetric)
3D reconstructionResolution: 2.4 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 441310 / Num. of class averages: 1 / Symmetry type: POINT
Atomic model buildingProtocol: RIGID BODY FIT / Space: REAL
Atomic model buildingPDB-ID: 7TO0

7to0


Pdb chain-ID: A / Accession code: 7TO0 / Source name: PDB / Type: experimental model
Refine LS restraints
Refine-IDTypeDev idealNumber
ELECTRON MICROSCOPYf_bond_d0.0026452
ELECTRON MICROSCOPYf_angle_d0.4368886
ELECTRON MICROSCOPYf_dihedral_angle_d6.3641185
ELECTRON MICROSCOPYf_chiral_restr0.0391025
ELECTRON MICROSCOPYf_plane_restr0.004994

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