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- EMDB-55625: 2'-fluoro-modified pyrimidine (FY) RNA aptamer binding to the rec... -

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Basic information

Entry
Database: EMDB / ID: EMD-55625
Title2'-fluoro-modified pyrimidine (FY) RNA aptamer binding to the receptor binding domain (RBD) of the SARS-CoV-2 spike protein. (focus map: RBD-aptamer)
Map dataHalf map of FY RNA anti-spike aptamer bound to the RBD of SARS-CoV-2 Spike protein.
Sample
  • Complex: Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptamer on a paranemic crossover triangle (PXT) and the SARS-CoV-2 Spike Protein
    • RNA: DNA/RNA (51-MER)
    • Protein or peptide: Spike glycoprotein
  • Ligand: MAGNESIUM ION
Keywordsorigami / modified nucleic acids / XNA / RNA / aptamer / 2'fluoro
Function / homology
Function and homology information


symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion ...symbiont-mediated disruption of host tissue / Maturation of spike protein / Translation of Structural Proteins / Virion Assembly and Release / host cell surface / host extracellular space / symbiont-mediated-mediated suppression of host tetherin activity / Induction of Cell-Cell Fusion / structural constituent of virion / membrane fusion / Attachment and Entry / entry receptor-mediated virion attachment to host cell / host cell endoplasmic reticulum-Golgi intermediate compartment membrane / positive regulation of viral entry into host cell / receptor-mediated virion attachment to host cell / host cell surface receptor binding / symbiont-mediated suppression of host innate immune response / endocytosis involved in viral entry into host cell / receptor ligand activity / fusion of virus membrane with host plasma membrane / fusion of virus membrane with host endosome membrane / viral envelope / symbiont entry into host cell / virion attachment to host cell / host cell plasma membrane / SARS-CoV-2 activates/modulates innate and adaptive immune responses / virion membrane / identical protein binding / membrane / plasma membrane
Similarity search - Function
Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal ...Spike (S) protein S1 subunit, receptor-binding domain, SARS-CoV-2 / Spike (S) protein S1 subunit, N-terminal domain, SARS-CoV-like / Coronavirus spike glycoprotein S1, C-terminal / Coronavirus spike glycoprotein S1, C-terminal / Spike glycoprotein, N-terminal domain superfamily / Spike S1 subunit, receptor binding domain superfamily, betacoronavirus / Spike glycoprotein, betacoronavirus / Betacoronavirus spike (S) glycoprotein S1 subunit N-terminal (NTD) domain profile. / Spike glycoprotein S1, N-terminal domain, betacoronavirus-like / Betacoronavirus-like spike glycoprotein S1, N-terminal / Betacoronavirus spike (S) glycoprotein S1 subunit C-terminal (CTD) domain profile. / Spike (S) protein S1 subunit, receptor-binding domain, betacoronavirus / Betacoronavirus spike glycoprotein S1, receptor binding / Spike glycoprotein S2 superfamily, coronavirus / Spike glycoprotein S2, coronavirus, heptad repeat 1 / Spike glycoprotein S2, coronavirus, heptad repeat 2 / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 1 (HR1) region profile. / Coronavirus spike (S) glycoprotein S2 subunit heptad repeat 2 (HR2) region profile. / Spike glycoprotein S2, coronavirus / Coronavirus spike glycoprotein S2
Similarity search - Domain/homology
Biological speciessynthetic construct (others) / synthetic RNA (others) / Severe acute respiratory syndrome coronavirus 2
Methodsingle particle reconstruction / cryo EM / Resolution: 3.46 Å
AuthorsKristoffersen EL / Andersen ES / Zwergious NH
Funding support Denmark, 1 items
OrganizationGrant numberCountry
Novo Nordisk FoundationNNF21OC0070452 Denmark
CitationJournal: To Be Published
Title: Serum-stable RNA origami nano-devices
Authors: Kristoffersen EL / Zwergius NH / Vallina NS / Gluck N / Stange A / Desdorf L / Civit L / Geary C / Kjems J / Valero J / Andersen ES
History
DepositionNov 10, 2025-
Header (metadata) releaseMar 4, 2026-
Map releaseMar 4, 2026-
UpdateMar 4, 2026-
Current statusMar 4, 2026Processing site: PDBe / Status: Released

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Structure visualization

Supplemental images

emd_55625.png

Downloads & links

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Map

FileDownload / File: emd_55625.map.gz / Format: CCP4 / Size: 1000 MB / Type: IMAGE STORED AS FLOATING POINT NUMBER (4 BYTES)
AnnotationHalf map of FY RNA anti-spike aptamer bound to the RBD of SARS-CoV-2 Spike protein.
Projections & slices

Image control

Size
Brightness
Contrast
Others
AxesZ (Sec.)Y (Row.)X (Col.)
0.97 Å/pix.
x 640 pix.
= 621.12 Å		0.97 Å/pix.
x 640 pix.
= 621.12 Å		0.97 Å/pix.
x 640 pix.
= 621.12 Å

Surface

Projections

Slices (1/3)

Slices (1/2)

Slices (2/3)

Images are generated by Spider.

Voxel sizeX=Y=Z: 0.9705 Å
Density

Histogram

Histogram (log scale)
Contour LevelBy AUTHOR: 0.3
Minimum - Maximum-0.5163686 - 1.1754938
Average (Standard dev.)0.000033986784 (±0.0053267274)
SymmetrySpace group: 1
Details

EMDB XML:

Map geometry
Axis orderXYZ
Origin000
Dimensions640640640
Spacing640640640
CellA=B=C: 621.12 Å
α=β=γ: 90.0 °

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Supplemental data

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Additional map: Half map of FY RNA anti-spike aptamer bound...

Fileemd_55625_additional_1.map
AnnotationHalf map of FY RNA anti-spike aptamer bound to the RBD of SARS-CoV-2 Spike protein (sharp).
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map of FY RNA anti-spike aptamer bound...

Fileemd_55625_half_map_1.map
AnnotationHalf map of FY RNA anti-spike aptamer bound to the RBD of SARS-CoV-2 Spike protein.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Half map: Half map of FY RNA anti-spike aptamer bound...

Fileemd_55625_half_map_2.map
AnnotationHalf map of FY RNA anti-spike aptamer bound to the RBD of SARS-CoV-2 Spike protein.
Projections & Slices
AxesZYX

Projections

Slices (1/2)
Density Histograms

Histogram

Histogram (log scale)

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Sample components

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Entire : Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptam...

EntireName: Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptamer on a paranemic crossover triangle (PXT) and the SARS-CoV-2 Spike Protein
Components
  • Complex: Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptamer on a paranemic crossover triangle (PXT) and the SARS-CoV-2 Spike Protein
    • RNA: DNA/RNA (51-MER)
    • Protein or peptide: Spike glycoprotein
  • Ligand: MAGNESIUM ION

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Supramolecule #1: Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptam...

SupramoleculeName: Complex of 2'Fluoro modified pyrimidine (FY) RNA Anti-Spike aptamer on a paranemic crossover triangle (PXT) and the SARS-CoV-2 Spike Protein
type: complex / ID: 1 / Parent: 0 / Macromolecule list: #1-#2
Details: FY RNA construct and protein were mixed at room temperature shortly before grid preparation.
Source (natural)Organism: synthetic construct (others)
Molecular weightTheoretical: 650 KDa

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Macromolecule #1: DNA/RNA (51-MER)

MacromoleculeName: DNA/RNA (51-MER) / type: rna / ID: 1 / Number of copies: 1
Source (natural)Organism: synthetic RNA (others)
Molecular weightTheoretical: 16.408471 KDa
SequenceString:
GG(CFZ)GA(CFZ)A(UFT)(UFT)(UFT) G(UFT)AA(UFT)(UFT)(CFZ)(CFZ)(UFT)G GA(CFZ)(CFZ)GA (UFT)A(CFZ) (UFT)(UFT)(CFZ)(CFZ)G(UFT)(CFZ)AGG A(CFZ)AGAGG(UFT)(UFT)G (CFZ)(CFZ)

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Macromolecule #2: Spike glycoprotein

MacromoleculeName: Spike glycoprotein / type: protein_or_peptide / ID: 2 / Number of copies: 1 / Enantiomer: LEVO
Source (natural)Organism: Severe acute respiratory syndrome coronavirus 2
Molecular weightTheoretical: 125.30775 KDa
Recombinant expressionOrganism: Homo sapiens (human)
SequenceString: QCVNLTTRTQ LPPAYTNSFT RGVYYPDKVF RSSVLHSTQD LFLPFFSNVT WFHAIHVSGT NGTKRFDNPV LPFNDGVYFA STEKSNIIR GWIFGTTLDS KTQSLLIVNN ATNVVIKVCE FQFCNDPFLG VYYHKNNKSW MESEFRVYSS ANNCTFEYVS Q PFLMDLEG ...String:
QCVNLTTRTQ LPPAYTNSFT RGVYYPDKVF RSSVLHSTQD LFLPFFSNVT WFHAIHVSGT NGTKRFDNPV LPFNDGVYFA STEKSNIIR GWIFGTTLDS KTQSLLIVNN ATNVVIKVCE FQFCNDPFLG VYYHKNNKSW MESEFRVYSS ANNCTFEYVS Q PFLMDLEG KQGNFKNLRE FVFKNIDGYF KIYSKHTPIN LVRDLPQGFS ALEPLVDLPI GINITRFQTL LALHRSYLTP GD SSSGWTA GAAAYYVGYL QPRTFLLKYN ENGTITDAVD CALDPLSETK CTLKSFTVEK GIYQTSNFRV QPTESIVRFP NIT NLCPFG EVFNATRFAS VYAWNRKRIS NCVADYSVLY NSASFSTFKC YGVSPTKLND LCFTNVYADS FVIRGDEVRQ IAPG QTGKI ADYNYKLPDD FTGCVIAWNS NNLDSKVGGN YNYLYRLFRK SNLKPFERDI STEIYQAGST PCNGVEGFNC YFPLQ SYGF QPTNGVGYQP YRVVVLSFEL LHAPATVCGP KKSTNLVKNK CVNFNFNGLT GTGVLTESNK KFLPFQQFGR DIADTT DAV RDPQTLEILD ITPCSFGGVS VITPGTNTSN QVAVLYQDVN CTEVPVAIHA DQLTPTWRVY STGSNVFQTR AGCLIGA EH VNNSYECDIP IGAGICASYQ TQTNSPSGAG SVASQSIIAY TMSLGAENSV AYSNNSIAIP TNFTISVTTE ILPVSMTK T SVDCTMYICG DSTECSNLLL QYGSFCTQLN RALTGIAVEQ DKNTQEVFAQ VKQIYKTPPI KDFGGFNFSQ ILPDPSKPS KRSFIEDLLF NKVTLADAGF IKQYGDCLGD IAARDLICAQ KFNGLTVLPP LLTDEMIAQY TSALLAGTIT SGWTFGAGAA LQIPFAMQM AYRFNGIGVT QNVLYENQKL IANQFNSAIG KIQDSLSSTA SALGKLQDVV NQNAQALNTL VKQLSSNFGA I SSVLNDIL SRLDPPEAEV QIDRLITGRL QSLQTYVTQQ LIRAAEIRAS ANLAATKMSE CVLGQSKRVD FCGKGYHLMS FP QSAPHGV VFLHVTYVPA QEKNFTTAPA ICHDGKAHFP REGVFVSNGT HWFVTQRNFY EPQIITTDNT FVSGNCDVVI GIV NNTVYD PLQPELDS

UniProtKB: Spike glycoprotein

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Macromolecule #4: MAGNESIUM ION

MacromoleculeName: MAGNESIUM ION / type: ligand / ID: 4 / Number of copies: 1 / Formula: MG
Molecular weightTheoretical: 24.305 Da

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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

BufferpH: 7.5
Component:
ConcentrationNameFormula
40.0 mMHEPES
5.0 mMMagnesium ChlorideMgCl2
50.0 mMPotasium ChloridKCl
VitrificationCryogen name: ETHANE / Chamber humidity: 95 % / Chamber temperature: 278 K / Instrument: LEICA EM GP

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Electron microscopy

MicroscopeTFS KRIOS
Image recordingFilm or detector model: GATAN K3 (6k x 4k) / Number grids imaged: 1 / Number real images: 4449 / Average exposure time: 1.5 sec. / Average electron dose: 60.0 e/Å2
Electron beamAcceleration voltage: 300 kV / Electron source: FIELD EMISSION GUN
Electron opticsC2 aperture diameter: 50.0 µm / Illumination mode: FLOOD BEAM / Imaging mode: BRIGHT FIELD / Cs: 2.7 mm / Nominal defocus max: 1.8 µm / Nominal defocus min: 0.8 µm / Nominal magnification: 130000
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

CTF correctionType: PHASE FLIPPING AND AMPLITUDE CORRECTION
Startup modelType of model: NONE
Final reconstructionAlgorithm: FOURIER SPACE / Resolution.type: BY AUTHOR / Resolution: 3.46 Å / Resolution method: FSC 0.143 CUT-OFF / Software - Name: cryoSPARC / Number images used: 736847
Initial angle assignmentType: MAXIMUM LIKELIHOOD
Final angle assignmentType: MAXIMUM LIKELIHOOD
FSC plot (resolution estimation)

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