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- PDB-9q3g: Cryo-EM structure of human AGO1 in complex with guide RNA -

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Basic information

Entry
Database: PDB / ID: 9q3g
TitleCryo-EM structure of human AGO1 in complex with guide RNA
Components
  • Non-homogenous guide RNA
  • Protein argonaute-1
KeywordsGENE REGULATION / Complex
Function / homology
Function and homology information


Post-transcriptional silencing by small RNAs / Competing endogenous RNAs (ceRNAs) regulate PTEN translation / Regulation of CDH11 mRNA translation by microRNAs / Regulation of NPAS4 mRNA translation / Regulation of PTEN mRNA translation / Small interfering RNA (siRNA) biogenesis / Transcriptional Regulation by MECP2 / RISC-loading complex / miRNA metabolic process / RISC complex assembly ...Post-transcriptional silencing by small RNAs / Competing endogenous RNAs (ceRNAs) regulate PTEN translation / Regulation of CDH11 mRNA translation by microRNAs / Regulation of NPAS4 mRNA translation / Regulation of PTEN mRNA translation / Small interfering RNA (siRNA) biogenesis / Transcriptional Regulation by MECP2 / RISC-loading complex / miRNA metabolic process / RISC complex assembly / regulatory ncRNA-mediated post-transcriptional gene silencing / miRNA processing / miRNA-mediated gene silencing by inhibition of translation / pre-miRNA processing / Regulation of MITF-M-dependent genes involved in apoptosis / RISC complex / TGFBR3 expression / Regulation of RUNX1 Expression and Activity / miRNA binding / MicroRNA (miRNA) biogenesis / RNA polymerase II complex binding / nuclear-transcribed mRNA catabolic process / Transcriptional Regulation by VENTX / Regulation of MECP2 expression and activity / core promoter sequence-specific DNA binding / Nuclear events stimulated by ALK signaling in cancer / NR1H3 & NR1H2 regulate gene expression linked to cholesterol transport and efflux / regulation of mRNA stability / negative regulation of angiogenesis / TP53 Regulates Metabolic Genes / P-body / Transcriptional regulation by small RNAs / positive regulation of non-canonical NF-kappaB signal transduction / MAPK6/MAPK4 signaling / RUNX1 regulates genes involved in megakaryocyte differentiation and platelet function / Oncogene Induced Senescence / Pre-NOTCH Transcription and Translation / cytoplasmic ribonucleoprotein granule / double-stranded RNA binding / Ca2+ pathway / Oxidative Stress Induced Senescence / Estrogen-dependent gene expression / single-stranded RNA binding / RNA polymerase II cis-regulatory region sequence-specific DNA binding / positive regulation of gene expression / positive regulation of transcription by RNA polymerase II / RNA binding / nucleoplasm / nucleus / cytoplasm / cytosol
Similarity search - Function
Protein argonaute, Mid domain / Mid domain of argonaute / Argonaute linker 2 domain / Protein argonaute, N-terminal / Argonaute-like, PIWI domain / N-terminal domain of argonaute / Argonaute linker 2 domain / DUF1785 / Argonaute, linker 1 domain / Argonaute linker 1 domain ...Protein argonaute, Mid domain / Mid domain of argonaute / Argonaute linker 2 domain / Protein argonaute, N-terminal / Argonaute-like, PIWI domain / N-terminal domain of argonaute / Argonaute linker 2 domain / DUF1785 / Argonaute, linker 1 domain / Argonaute linker 1 domain / Piwi domain profile. / Piwi domain / Piwi domain / Piwi / PAZ domain superfamily / PAZ / PAZ domain / PAZ domain profile. / PAZ domain / Ribonuclease H superfamily / Ribonuclease H-like superfamily
Similarity search - Domain/homology
RNA / Protein argonaute-1
Similarity search - Component
Biological speciesHomo sapiens (human)
Trichoplusia ni (cabbage looper)
MethodELECTRON MICROSCOPY / single particle reconstruction / cryo EM / Resolution: 3.3 Å
AuthorsSavidge, A. / Adhav, V. / Shen, Z. / Fu, T. / Nakanishi, K.
Funding support United States, 1items
OrganizationGrant numberCountry
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS) United States
CitationJournal: To Be Published
Title: Cryo-EM structure of human AGO1 in complex with guide RNA
Authors: Savidge, A. / Zhang, H. / Adhav, V. / Kehling, A. / Shen, Z. / Fu, T. / Nakanishi, K.
History
DepositionAug 18, 2025Deposition site: RCSB / Processing site: RCSB
Revision 1.0Oct 29, 2025Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: EM metadata / Data content type: EM metadata / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: FSC / Data content type: FSC / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Half map / Part number: 1 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Half map / Part number: 2 / Data content type: Half map / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Image / Data content type: Image / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 2025Data content type: Mask / Part number: 1 / Data content type: Mask / Provider: repository / Type: Initial release
Revision 1.0Oct 29, 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
A: Protein argonaute-1
B: Non-homogenous guide RNA


Theoretical massNumber of molelcules
Total (without water)100,4052
Polymers100,4052
Non-polymers00
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 Protein argonaute-1 / Argonaute1 / hAgo1 / Argonaute RISC catalytic component 1 / Eukaryotic translation initiation ...Argonaute1 / hAgo1 / Argonaute RISC catalytic component 1 / Eukaryotic translation initiation factor 2C 1 / eIF-2C 1 / eIF2C 1 / Putative RNA-binding protein Q99


Mass: 98880.906 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Homo sapiens (human) / Gene: AGO1, EIF2C1 / Production host: Trichoplusia ni (cabbage looper) / References: UniProt: Q9UL18
#2: RNA chain Non-homogenous guide RNA


Mass: 1523.801 Da / Num. of mol.: 1
Source method: isolated from a genetically manipulated source
Source: (gene. exp.) Trichoplusia ni (cabbage looper) / Production host: Trichoplusia ni (cabbage looper)
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

ComponentName: Complex of human Argonaute1 bound to a non-homogenous guide RNA
Type: COMPLEX / Entity ID: all / Source: MULTIPLE SOURCES
Molecular weightValue: 0.106 MDa / Experimental value: NO
Source (natural)Organism: Homo sapiens (human)
Source (recombinant)Organism: Trichoplusia ni (cabbage looper)
Buffer solutionpH: 7.5
Buffer component
IDConc.NameFormulaBuffer-ID
150 mMHEPES pH 7.5C8H18N2O4S1
2150 mMsodium chlorideNaCl1
30.5 mMTCEPC9H15O6P1
42 mMBS3C16H18N2Na2O14S21
SpecimenConc.: 0.35 mg/ml / Embedding applied: NO / Shadowing applied: NO / Staining applied: NO / Vitrification applied: YES
Specimen supportGrid material: GOLD / Grid mesh size: 300 divisions/in. / Grid type: UltrAuFoil R1.2/1.3
VitrificationInstrument: FEI VITROBOT MARK IV / Cryogen name: ETHANE / Humidity: 100 % / Chamber temperature: 277.15 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: -2500 nm / Nominal defocus min: -500 nm
Image recordingAverage exposure time: 2.75 sec. / Electron dose: 50 e/Å2 / Film or detector model: GATAN K3 (6k x 4k)

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Processing

EM software
IDNameVersionCategory
1cryoSPARC4.7.0particle selection
2PHENIX1.20.1_4487model refinement
3EPUimage acquisition
5cryoSPARC4.7.0CTF correction
10cryoSPARC4.7.0initial Euler assignment
11cryoSPARC4.7.0final Euler assignment
12cryoSPARCclassification
13cryoSPARC4.7.03D reconstruction
CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
3D reconstructionResolution: 3.3 Å / Resolution method: FSC 0.143 CUT-OFF / Num. of particles: 276867 / Symmetry type: POINT
RefinementHighest resolution: 3.3 Å
Stereochemistry target values: REAL-SPACE (WEIGHTED MAP SUM AT ATOM CENTERS)

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