9zdu

Crystal structure of SARS-CoV-2 RBD in complex with human Ab401 Fab

Method: X-RAY DIFFRACTION Dmax: 103.0 Å Quality: GOOD

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

Spike protein S1

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 heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 328–533 Fragment:Receptor-Binding Domain Ab401 Fab heavy chain × 1 Ab401 Fab light chain × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 PO4 PHOSPHATE ION × 1 PEG DI(HYDROXYETHYL)ETHER × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;293 K;0.2 M Ammonium phosphate monobasic 20% PEG 3350 Resolution 2.60 Å R-free 0.253

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 1
Chains and sequence ranges Author chain A; PDBConstruct 1–206; UniProt 328–533

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 9zdu

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9zdu
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9zdu
Deposition date deposition_date2025-11-26
Structure title titleCrystal structure of SARS-CoV-2 RBD in complex with human Ab401 Fab
Keywords keywordsneutralizing antibody, viral protein, IMMUNE SYSTEM, VIRAL PROTEIN-IMMUNE SYSTEM complex; VIRAL PROTEIN/IMMUNE SYSTEM
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier30.77
Radius of gyration Rg (electron density) rg_electron30.41
Forward intensity I(0) i081252100.00
Molecular weight molecular_weight70557.0 kDa
Excluded volume excluded_volume87871 ų
Envelope volume envelope_volume113230 ų
Hydration-shell volume shell_volume32467 ų
Envelope diameter envelope_diameter111.0
Shell Rg shell_rg36.25
Envelope Rg envelope_rg30.14
Shape Rg shape_rg30.36
Total Rg total_rg31.08
Total atoms total_atoms4972
Residues n_residues623
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 dmax103.0
Rg (real space) rg_real30.92
Rg uncertainty (real space) rg_real_error0.90
I(0) (real space) i0_real8.1250e+07
I(0) uncertainty (real space) i0_real_error1.2240e+06
Rg (reciprocal space) rg_reciprocal30.86
I(0) (reciprocal space) i0_reciprocal81250000.0000
Solution quality estimate total_estimate0.8731
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary34.3
Skewness Skewness skewness0.463
Kurtosis Kurtosis kurtosis-0.272
Angular range angular_range— – 0.2550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha9644000.0000
Real-space data points n_real_points52
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.865; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.896; Smooth: 0.854

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (7)

8. Citations (1)

9. Files and Curves (10)