7kfx

Structural basis for a germline-biased antibody response to SARS-CoV-2 (RBD:C1A-C2 Fab)

Method: X-RAY DIFFRACTION Dmax: 115.8 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 heterocomplex Heteromer Protein × 3 PDB declaration: trimeric(3) Consistent with protein copy count Chain A; UniProt 319–541 Not recorded heavy chain of human antibody C1A-C2 Fab × 1 light chain of human antibody C1A-C2 Fab × 1 NAG 2-acetamido-2-deoxy-beta-D-glucopyranose × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, HANGING DROP;pH 7.6;293 K;protein sample: 13 mg/mL in 150mM NaCl, 25 mM Tris-HCl pH 7.5 mother liquor composition (equal volume): 0.03 M Citric acid, 0.07M BIS-TRIS propane/pH 7.6, 20% (w/v) PEG 3350 Resolution 2.23 Å R-free 0.226

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 6–228; UniProt 319–541

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 7kfx

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7kfx
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7kfx
Deposition date deposition_date2020-10-15
Structure title titleStructural basis for a germline-biased antibody response to SARS-CoV-2 (RBD:C1A-C2 Fab)
Keywords keywordsCOVID-19, SARS-CoV-2, neutralizing antibody, affinity maturation, IMMUNE SYSTEM, IMMUNE SYSTEM-Viral protein complex; IMMUNE SYSTEM/Viral protein
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier32.17
Radius of gyration Rg (electron density) rg_electron32.13
Forward intensity I(0) i077763300.00
Molecular weight molecular_weight69178.0 kDa
Excluded volume excluded_volume86197 ų
Envelope volume envelope_volume111880 ų
Hydration-shell volume shell_volume31235 ų
Envelope diameter envelope_diameter123.0
Shell Rg shell_rg36.25
Envelope Rg envelope_rg32.23
Shape Rg shape_rg32.06
Total Rg total_rg32.71
Total atoms total_atoms4875
Residues n_residues627
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 dmax115.8
Rg (real space) rg_real32.56
Rg uncertainty (real space) rg_real_error1.48
I(0) (real space) i0_real7.7760e+07
I(0) uncertainty (real space) i0_real_error1.3010e+06
Rg (reciprocal space) rg_reciprocal32.40
I(0) (reciprocal space) i0_reciprocal77750000.0000
Solution quality estimate total_estimate0.8186
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary30.7
Skewness Skewness skewness0.593
Kurtosis Kurtosis kurtosis-0.149
Angular range angular_range— – 0.2450 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha11680000.0000
Real-space data points n_real_points50
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.678; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.687; Smooth: 0.918

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd7kfxa_
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.318 — SARS receptor-binding domain-like
Superfamily Superfamily superfamilyd.318.1 — SARS receptor-binding domain-like
Family Family familyd.318.1.1 — SARS receptor-binding domain-like
Domain ID domain_idd7kfxh_
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.1 — V set domains (antibody variable domain-like)
Domain ID domain_idd7kfxl1
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.0 — automated matches
Domain ID domain_idd7kfxl2
Class classb — All beta proteins
Fold Fold foldb.1 — Immunoglobulin-like beta-sandwich
Superfamily Superfamily superfamilyb.1.1 — Immunoglobulin
Family Family familyb.1.1.2 — C1 set domains (antibody constant domain-like)

CATH v4.4 (4 domains)

Domain ID domain_id7kfxH01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7kfxH02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7kfxL01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins
Domain ID domain_id7kfxL02
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology40 — Immunoglobulin-like
Homologous superfamily homologous superfamily10 — Immunoglobulins

8. Citations (1)

9. Files and Curves (10)