7krp

Structure of SARS-CoV-2 backtracked complex complex bound to nsp13 helicase - BTC (local refinement)

Method: ELECTRON MICROSCOPY Dmax: 155.7 Å Quality: GOOD

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

RNA-directed RNA polymerase

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–RNA Homooligomer Protein × 4 RNA 2 PDB declaration: hexameric(6) Consistent with all polymer counts Chain A; UniProt 4393–5324 Chain B; UniProt 3943–4140 Chain C; UniProt 3860–3942 Chain D; UniProt 3943–4140 Fragment:UNP residues 4393-5324 Fragment:UNP residues 3943-4140 Fragment:UNP residues 3860-3942 RNA (37-MER) × 1 RNA (36-MER) × 1 ZN ZINC ION × 2 MG MAGNESIUM ION × 1 ADP ADENOSINE-5'-DIPHOSPHATE × 1 1N7 CHAPSO × 3 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.20 Å

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, 2, 3
Chains and sequence ranges Author chain A; PDBConstruct 1–932; UniProt 4393–5324 Author chain B; PDBConstruct 2–199; UniProt 3943–4140 Author chain D; PDBConstruct 2–199; UniProt 3943–4140 Author chain C; PDBConstruct 6–88; UniProt 3860–3942

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 7krp

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id7krp
Deposition date deposition_date2020-11-20
Structure title titleStructure of SARS-CoV-2 backtracked complex complex bound to nsp13 helicase - BTC (local refinement)
Keywords keywordsRNA-dependent RNA polymerase, viral replication-transcription complex, transcription, viral proteins, TRANSFERASE-RNA complex; TRANSFERASE/RNA
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier43.62
Radius of gyration Rg (electron density) rg_electron42.67
Forward intensity I(0) i0580795000.00
Molecular weight molecular_weight180510.0 kDa
Excluded volume excluded_volume218620 ų
Envelope volume envelope_volume294970 ų
Hydration-shell volume shell_volume60855 ų
Envelope diameter envelope_diameter163.6
Shell Rg shell_rg44.54
Envelope Rg envelope_rg43.40
Shape Rg shape_rg42.62
Total Rg total_rg42.92
Total atoms total_atoms12561
Residues n_residues1446
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 dmax155.7
Rg (real space) rg_real43.96
Rg uncertainty (real space) rg_real_error1.65
I(0) (real space) i0_real5.8080e+08
I(0) uncertainty (real space) i0_real_error1.1040e+07
Rg (reciprocal space) rg_reciprocal43.62
I(0) (reciprocal space) i0_reciprocal580600000.0000
Solution quality estimate total_estimate0.8301
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary43.3
Skewness Skewness skewness0.584
Kurtosis Kurtosis kurtosis-0.033
Angular range angular_range— – 0.1800 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha72940000.0000
Real-space data points n_real_points37
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.729; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.860; Smooth: 0.739

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (9)

7. Fold Classification (SCOP + CATH) 2 domains

CATH v4.4 (2 domains)

Domain ID domain_id7krpB01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily3540 — Nsp8 replicase, head domain
Domain ID domain_id7krpD01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology70 — Alpha-Beta Plaits
Homologous superfamily homologous superfamily3540 — Nsp8 replicase, head domain

8. Citations (1)

9. Files and Curves (10)