7lbn

X-ray crystal structure of the SARS-CoV-2 main protease with Calpain I Inhibitor

Method: X-RAY DIFFRACTION Dmax: 78.9 Å Quality: REASONABLE

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

3C-like proteinase

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 heterocomplex Heteromer Protein × 4 PDB declaration: tetrameric(4) Consistent with protein copy count Chain A; UniProt 3264–3569 Not recorded Calpain I Inhibitor × 2 SO4 SULFATE ION × 2 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION, SITTING DROP;pH 7.5;293 K;0.2M sodium citrate, 15% PEG3350, 20mM HEPES pH 7.5 Resolution 1.76 Å R-free 0.185

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 4324 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 1–306; UniProt 3264–3569

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 7lbn

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7lbn
Download Download

2. Structure Basics 2. Structure Basics

Entry ID entry_id7lbn
Deposition date deposition_date2021-01-08
Structure title titleX-ray crystal structure of the SARS-CoV-2 main protease with Calpain I Inhibitor
Keywords keywordsProtease-Inhibitor complex, VIRAL PROTEIN; VIRAL PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier22.44
Radius of gyration Rg (electron density) rg_electron21.76
Forward intensity I(0) i019326400.00
Molecular weight molecular_weight33234.0 kDa
Excluded volume excluded_volume41499 ų
Envelope volume envelope_volume48516 ų
Hydration-shell volume shell_volume19581 ų
Envelope diameter envelope_diameter79.2
Shell Rg shell_rg27.45
Envelope Rg envelope_rg21.97
Shape Rg shape_rg21.75
Total Rg total_rg22.52
Total atoms total_atoms2329
Residues n_residues303
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 dmax78.9
Rg (real space) rg_real22.56
Rg uncertainty (real space) rg_real_error0.56
I(0) (real space) i0_real1.9330e+07
I(0) uncertainty (real space) i0_real_error2.5590e+05
Rg (reciprocal space) rg_reciprocal22.53
I(0) (reciprocal space) i0_reciprocal19330000.0000
Solution quality estimate total_estimate0.6488
Solution quality rating solution_quality REASONABLE a REASONABLE solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary22.7
Skewness Skewness skewness0.504
Kurtosis Kurtosis kurtosis-0.311
Angular range angular_range— – 0.3550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha8897000.0000
Real-space data points n_real_points67
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.673; Stabil: 1.000; Sysdev: 0.189; Positv: 1.000; Valcen: 0.846; Smooth: 0.998

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (4)

7. Fold Classification (SCOP + CATH) 1 domains

CATH v4.4 (1 domains)

Domain ID domain_id7lbnA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology1840 — main proteinase (3clpro) structure, domain 3
Homologous superfamily homologous superfamily10 — main proteinase (3clpro) structure, domain 3

8. Citations (1)

9. Files and Curves (10)