8xch

SARS-CoV-2 Replication-Transcription Complex has a dimer-of-dimeric architecture (ddRTC) in pre-capping initiation.

Method: ELECTRON MICROSCOPY Dmax: 229.3 Å Quality: EXCELLENT

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

Replicase polyprotein 1ab

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 Heteromer Protein × 24 RNA 8 PDB declaration: 32-meric(32) Consistent with all polymer counts Chain A; UniProt 4393–5324 Chain B; UniProt 3943–4140 Chain D; UniProt 3943–4140 Chain E; UniProt 5325–5925 Chain F; UniProt 5325–5925 Chain I; UniProt 4393–5324 Chain J; UniProt 3943–4140 Chain L; UniProt 3943–4140 Chain M; UniProt 5325–5925 Chain N; UniProt 5325–5925 Chain Q; UniProt 4393–5324 Chain R; UniProt 3943–4140 Chain T; UniProt 3943–4140 Chain U; UniProt 5325–5925 Chain V; UniProt 5325–5925 Chain Y; UniProt 4393–5324 Chain Z; UniProt 3943–4140 Chain b; UniProt 3943–4140 Chain c; UniProt 5325–5925 Chain d; UniProt 5325–5925 Fragment:UNP residues 4393-5324 Fragment:UNP residues 3943-4140 Fragment:UNP residues 5325-5925 Non-structural protein 7 × 4 (P0DTC1) RNA (39-MER) × 4 RNA (39-MER) × 4 ZN ZINC ION × 32 ADP ADENOSINE-5'-DIPHOSPHATE × 2 MG MAGNESIUM ION × 2 PO4 PHOSPHATE ION × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE-PROPANE Resolution 3.40 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, 4
Chains and sequence ranges Author chain A; PDBConstruct 1–932; UniProt 4393–5324 Author chain I; PDBConstruct 1–932; UniProt 4393–5324 Author chain Q; PDBConstruct 1–932; UniProt 4393–5324 Author chain Y; PDBConstruct 1–932; UniProt 4393–5324 Author chain B; PDBConstruct 1–198; UniProt 3943–4140 Author chain D; PDBConstruct 1–198; UniProt 3943–4140 Author chain J; PDBConstruct 1–198; UniProt 3943–4140 Author chain L; PDBConstruct 1–198; UniProt 3943–4140 Author chain R; PDBConstruct 1–198; UniProt 3943–4140 Author chain T; PDBConstruct 1–198; UniProt 3943–4140 Author chain Z; PDBConstruct 1–198; UniProt 3943–4140 Author chain b; PDBConstruct 1–198; UniProt 3943–4140 Author chain E; PDBConstruct 1–601; UniProt 5325–5925 Author chain F; PDBConstruct 1–601; UniProt 5325–5925 Author chain M; PDBConstruct 1–601; UniProt 5325–5925 Author chain N; PDBConstruct 1–601; UniProt 5325–5925 Author chain U; PDBConstruct 1–601; UniProt 5325–5925 Author chain V; PDBConstruct 1–601; UniProt 5325–5925 Author chain c; PDBConstruct 1–601; UniProt 5325–5925 Author chain d; PDBConstruct 1–601; UniProt 5325–5925

Non-structural protein 7

Severe acute respiratory syndrome coronavirus 2

UniProt P0DTC1

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 Heteromer Protein × 24 RNA 8 PDB declaration: 32-meric(32) Consistent with all polymer counts Chain C; UniProt 3860–3942 Chain K; UniProt 3860–3942 Chain S; UniProt 3860–3942 Chain a; UniProt 3860–3942 Fragment:UNP residues 3860-3942 Replicase polyprotein 1ab × 4 (P0DTD1) Non-structural protein 8 × 8 (P0DTD1) Helicase × 8 (P0DTD1) RNA (39-MER) × 4 RNA (39-MER) × 4 ZN ZINC ION × 32 ADP ADENOSINE-5'-DIPHOSPHATE × 2 MG MAGNESIUM ION × 2 PO4 PHOSPHATE ION × 1 ELECTRON MICROSCOPY cryo-EM buffer:pH 7 cryo-EM vitrification conditions:Cryogen ETHANE-PROPANE Resolution 3.40 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.

440 other PDB entries and 508 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name R1A_SARS2
Isoform
PDB entities 3
Chains and sequence ranges Author chain C; PDBConstruct 1–83; UniProt 3860–3942 Author chain K; PDBConstruct 1–83; UniProt 3860–3942 Author chain S; PDBConstruct 1–83; UniProt 3860–3942 Author chain a; PDBConstruct 1–83; 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 8xch

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8xch
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8xch
Deposition date deposition_date2023-12-09
Structure title titleSARS-CoV-2 Replication-Transcription Complex has a dimer-of-dimeric architecture (ddRTC) in pre-capping initiation.
Keywords keywordsSARS-CoV-2, Replication-Transcription Complex, helicase, RNA unwinding, cryo-EM, VIRAL PROTEIN; VIRAL PROTEIN
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier88.14
Radius of gyration Rg (electron density) rg_electron88.54
Forward intensity I(0) i023917300000.00
Molecular weight molecular_weight1243600.0 kDa
Excluded volume excluded_volume1523600 ų
Envelope volume envelope_volume2819400 ų
Hydration-shell volume shell_volume265870 ų
Envelope diameter envelope_diameter321.4
Shell Rg shell_rg92.24
Envelope Rg envelope_rg83.32
Shape Rg shape_rg88.59
Total Rg total_rg88.43
Total atoms total_atoms86758
Residues n_residues10530
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 dmax229.3
Rg (real space) rg_real84.78
Rg uncertainty (real space) rg_real_error0.50
I(0) (real space) i0_real2.2780e+10
I(0) uncertainty (real space) i0_real_error4.3560e+08
Rg (reciprocal space) rg_reciprocal88.93
I(0) (reciprocal space) i0_reciprocal23970000000.0000
Solution quality estimate total_estimate0.9083
Solution quality rating solution_quality EXCELLENT a EXCELLENT solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary101.9
Skewness Skewness skewness0.075
Kurtosis Kurtosis kurtosis-0.548
Angular range angular_range— – 0.0900 −1
Current regularization parameter α current_alpha1.1180
Highest regularization parameter α highest_alpha892600000.0000
Real-space data points n_real_points19
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 1.000; Stabil: 0.961; Sysdev: 1.000; Positv: 1.000; Valcen: 0.927; Smooth: 0.000

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (10)

8. Citations (1)

9. Files and Curves (10)