9i4v

Crystal structure of the SARS-CoV-2 helicase NSP13

Method: X-RAY DIFFRACTION Dmax: 112.9 Å Quality: EXCELLENT

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

SARS-CoV-2 helicase NSP13

Severe acute respiratory syndrome coronavirus 2

UniProt P0DTD1

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 monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain A; UniProt 5325–5925 Not recorded ZN ZINC ION × 3 PO4 PHOSPHATE ION × 2 MPO 3[N-MORPHOLINO]PROPANE SULFONIC ACID × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 7.5;293 K;16 % Ethylene Glycol, 8 % PEG 8000, 0.05 M Na HEPES, 0.05 M MOPS, 0.03 M Sodium nitrate, 0.03 M Sodium phosphate dibasic, 0.03 M Ammonium sulfate, 9 % MPD Resolution 2.33 Å R-free 0.254
2 Protein monomer Monomer Protein × 1 PDB declaration: monomeric(1) Consistent with protein copy count Chain B; UniProt 5325–5925 Not recorded ZN ZINC ION × 3 PO4 PHOSPHATE ION × 2 MPO 3[N-MORPHOLINO]PROPANE SULFONIC ACID × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 7.5;293 K;16 % Ethylene Glycol, 8 % PEG 8000, 0.05 M Na HEPES, 0.05 M MOPS, 0.03 M Sodium nitrate, 0.03 M Sodium phosphate dibasic, 0.03 M Ammonium sulfate, 9 % MPD Resolution 2.33 Å R-free 0.254

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.

3350 other PDB entries and 4323 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name R1AB_SARS2
Isoform
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 3–603; UniProt 5325–5925 Author chain B; PDBConstruct 3–603; UniProt 5325–5925

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 9i4v

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 9i4v
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2. Structure Basics 2. Structure Basics

Entry ID entry_id9i4v
Deposition date deposition_date2025-01-27
最后修订 last_revision2025-06-11
Structure title titleCrystal structure of the SARS-CoV-2 helicase NSP13
Keywords keywordsNSP13, Helicase, SARS-CoV-2, Hydrolase; HYDROLASE
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier35.60
Radius of gyration Rg (electron density) rg_electron35.06
Forward intensity I(0) i0254331000.00
Molecular weight molecular_weight127900.0 kDa
Excluded volume excluded_volume159840 ų
Envelope volume envelope_volume212510 ų
Hydration-shell volume shell_volume50878 ų
Envelope diameter envelope_diameter115.4
Shell Rg shell_rg41.50
Envelope Rg envelope_rg34.10
Shape Rg shape_rg35.04
Total Rg total_rg35.58
Total atoms total_atoms8950
Residues n_residues1155
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 dmax112.9
Rg (real space) rg_real35.45
Rg uncertainty (real space) rg_real_error0.56
I(0) (real space) i0_real2.5430e+08
I(0) uncertainty (real space) i0_real_error3.8000e+06
Rg (reciprocal space) rg_reciprocal35.54
I(0) (reciprocal space) i0_reciprocal254400000.0000
Solution quality estimate total_estimate0.9037
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary43.6
Skewness Skewness skewness0.140
Kurtosis Kurtosis kurtosis-0.558
Angular range angular_range— – 0.2200 −1
Current regularization parameter α current_alpha0.0002
Highest regularization parameter α highest_alpha24780000.0000
Real-space data points n_real_points45
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.939; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.998; Smooth: 0.929

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

8. Citations (1)

9. Files and Curves (10)