7ca8

The crystal structure of COVID-19 main protease in complex with an inhibitor Shikonin

Method: X-RAY DIFFRACTION Dmax: 77.9 Å Quality: EXCELLENT

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 homooligomer Homooligomer Protein × 2 PDB declaration: dimeric(2) Consistent with protein copy count Chain A; UniProt 3264–3561 Chain B; UniProt 3264–3561 Not recorded FNO 2-[(1R)-4-methyl-1-oxidanyl-pent-3-enyl]-5,8-bis(oxidanyl)naphthalene-1,4-dione × 1 X-RAY DIFFRACTION X-ray crystallization conditions:VAPOR DIFFUSION;293 K;0.1M HEPES 7.5, 20% PEG 10000 Resolution 2.45 Å R-free 0.279

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 1–298; UniProt 3264–3561 Author chain B; PDBConstruct 1–298; UniProt 3264–3561

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 7ca8

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7ca8
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7ca8
Deposition date deposition_date2020-06-08
Structure title titleThe crystal structure of COVID-19 main protease in complex with an inhibitor Shikonin
Keywords keywordsViral protein, Main Protease, inhibitor; VIRAL PROTEIN
Experimental Method methodX-RAY DIFFRACTION

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

Radius of gyration Rg (Guinier) rg_guinier26.17
Radius of gyration Rg (electron density) rg_electron25.16
Forward intensity I(0) i060873300.00
Molecular weight molecular_weight59972.0 kDa
Excluded volume excluded_volume74609 ų
Envelope volume envelope_volume91035 ų
Hydration-shell volume shell_volume30156 ų
Envelope diameter envelope_diameter80.8
Shell Rg shell_rg32.38
Envelope Rg envelope_rg25.05
Shape Rg shape_rg25.14
Total Rg total_rg26.00
Total atoms total_atoms4209
Residues n_residues569
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 dmax77.9
Rg (real space) rg_real26.02
Rg uncertainty (real space) rg_real_error0.49
I(0) (real space) i0_real6.0870e+07
I(0) uncertainty (real space) i0_real_error8.5260e+05
Rg (reciprocal space) rg_reciprocal26.07
I(0) (reciprocal space) i0_reciprocal60880000.0000
Solution quality estimate total_estimate0.9156
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary37.0
Skewness Skewness skewness0.085
Kurtosis Kurtosis kurtosis-0.632
Angular range angular_range— – 0.3050 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha34680000.0000
Real-space data points n_real_points62
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.971; Stabil: 0.999; Sysdev: 1.000; Positv: 1.000; Valcen: 0.996; Smooth: 0.994

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (3)

7. Fold Classification (SCOP + CATH) 5 domains

SCOP 2.08 (2 domains)

Domain ID domain_idd7ca8a_
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.4 — Viral cysteine protease of trypsin fold
Domain ID domain_idd7ca8b_
Class classb — All beta proteins
Fold Fold foldb.47 — Trypsin-like serine proteases
Superfamily Superfamily superfamilyb.47.1 — Trypsin-like serine proteases
Family Family familyb.47.1.4 — Viral cysteine protease of trypsin fold

CATH v4.4 (3 domains)

Domain ID domain_id7ca8A01
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
Domain ID domain_id7ca8B01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology10 — Thrombin, subunit H
Homologous superfamily homologous superfamily10 — Trypsin-like serine proteases
Domain ID domain_id7ca8B02
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)