9t74

2'-fluoro-modified pyrimidine (FY) RNA aptamer binding to the receptor binding domain (RBD) of the SARS-CoV-2 spike protein. (focus map: RBD-aptamer)

Method: ELECTRON MICROSCOPY Dmax: 87.2 Å Quality: GOOD

1. Protein Identity and Related Structures Protein Identity & Related Structures

Spike glycoprotein

Severe acute respiratory syndrome coronavirus 2

UniProt P0DTC2

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein–RNA Monomer Protein × 1 RNA 1 其他Polymer 1 PDB declaration: dimeric(2) Count mismatch; review required Chain B; UniProt 14–1147 Not recorded DNA/RNA (51-MER) × 1 2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose × 1 MG MAGNESIUM ION × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.5 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.46 Å

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

2152 other PDB entries and 2473 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name SPIKE_SARS2
Isoform
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–1134; UniProt 14–1147

The page prioritizes protein identity, the current assembly, associated components, oligomeric state and cross-PDB links. Chain mapping and sequence ranges are retained as data evidence. Internal IDs, import timestamps and assembly operation expressions are maintenance fields and are not shown here.

SAXS scattering curve SAXS Profile

SAXS profile for 9t74

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9t74
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id9t74
Deposition date deposition_date2025-11-10
Structure title 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)
Keywords keywords;origami, modified nucleic acids, XNA, RNA, aptamer, 2'fluoro ;; RNA
Experimental Method methodELECTRON MICROSCOPY

3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier24.25
Radius of gyration Rg (electron density) rg_electron23.60
Forward intensity I(0) i043183000.00
Molecular weight molecular_weight39021.0 kDa
Excluded volume excluded_volume43509 ų
Envelope volume envelope_volume58273 ų
Hydration-shell volume shell_volume22147 ų
Envelope diameter envelope_diameter96.4
Shell Rg shell_rg28.93
Envelope Rg envelope_rg23.85
Shape Rg shape_rg23.47
Total Rg total_rg24.39
Total atoms total_atoms2673
Residues n_residues222
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 −1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3

4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax87.2
Rg (real space) rg_real24.41
Rg uncertainty (real space) rg_real_error1.00
I(0) (real space) i0_real4.3180e+07
I(0) uncertainty (real space) i0_real_error7.3150e+05
Rg (reciprocal space) rg_reciprocal24.37
I(0) (reciprocal space) i0_reciprocal43180000.0000
Solution quality estimate total_estimate0.7558
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks3
Primary peak position r_peak_primary26.3
Skewness Skewness skewness0.546
Kurtosis Kurtosis kurtosis0.029
Angular range angular_range— – 0.3250 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha3758000.0000
Real-space data points n_real_points64
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.685; Stabil: 0.998; Sysdev: 1.000; Positv: 1.000; Valcen: 0.772; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

8. Citations (1)

9. Files and Curves (10)