8red

Cryo-EM structure of bacterial RNA polymerase-sigma54 initial transcribing complex - 8nt complex

Method: ELECTRON MICROSCOPY Dmax: 165.5 Å Quality: GOOD

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

DNA-directed RNA polymerase subunit alpha

Escherichia coli K-12

UniProt P0A7Z4

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 6 DNA 2 RNA 1 PDB declaration: nonameric(9) Consistent with all polymer counts Chain A; UniProt 4–324 Chain B; UniProt 4–324 Not recorded DNA (46-MER) × 1 ;RNA (5'-R(P*GP*CP*CP*GP*CP*GP*AP*U)-3') ; × 1 DNA (51-MER) × 1 DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (P0A800) RNA polymerase sigma-54 factor × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.90 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.

276 other PDB entries and 305 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RPOA_ECOLI
Isoform
PDB entities 4
Chains and sequence ranges Author chain A; PDBConstruct 1–321; UniProt 4–324 Author chain B; PDBConstruct 1–321; UniProt 4–324

DNA-directed RNA polymerase subunit beta

Escherichia coli K-12

UniProt P0A8V2

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 6 DNA 2 RNA 1 PDB declaration: nonameric(9) Consistent with all polymer counts Chain C; UniProt 1–1341 Not recorded DNA (46-MER) × 1 ;RNA (5'-R(P*GP*CP*CP*GP*CP*GP*AP*U)-3') ; × 1 DNA (51-MER) × 1 DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (P0A800) RNA polymerase sigma-54 factor × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.90 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.

219 other PDB entries and 240 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RPOB_ECOLI
Isoform
PDB entities 5
Chains and sequence ranges Author chain C; PDBConstruct 1–1341; UniProt 1–1341

;DNA-directed RNA polymerase subunit beta' ;

Escherichia coli K-12

UniProt P0A8T7

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 6 DNA 2 RNA 1 PDB declaration: nonameric(9) Consistent with all polymer counts Chain D; UniProt 4–1376 Not recorded DNA (46-MER) × 1 ;RNA (5'-R(P*GP*CP*CP*GP*CP*GP*AP*U)-3') ; × 1 DNA (51-MER) × 1 DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) DNA-directed RNA polymerase subunit omega × 1 (P0A800) RNA polymerase sigma-54 factor × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.90 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.

239 other PDB entries and 275 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RPOC_ECOLI
Isoform
PDB entities 6
Chains and sequence ranges Author chain D; PDBConstruct 1–1373; UniProt 4–1376

DNA-directed RNA polymerase subunit omega

Escherichia coli K-12

UniProt P0A800

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Other combination Heteromer Protein × 6 DNA 2 RNA 1 PDB declaration: nonameric(9) Consistent with all polymer counts Chain E; UniProt 2–75 Not recorded DNA (46-MER) × 1 ;RNA (5'-R(P*GP*CP*CP*GP*CP*GP*AP*U)-3') ; × 1 DNA (51-MER) × 1 DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) RNA polymerase sigma-54 factor × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.90 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.

258 other PDB entries and 277 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name RPOZ_ECOLI
Isoform
PDB entities 7
Chains and sequence ranges Author chain E; PDBConstruct 1–74; UniProt 2–75

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 8red

P(r) Distance Distribution P(r) Distribution

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

Entry ID entry_id8red
Deposition date deposition_date2023-12-10
Structure title titleCryo-EM structure of bacterial RNA polymerase-sigma54 initial transcribing complex - 8nt complex
Keywords keywordsinitiation, rna polymerase, sigma54, TRANSCRIPTION; TRANSCRIPTION
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier50.55
Radius of gyration Rg (electron density) rg_electron49.84
Forward intensity I(0) i02763680000.00
Molecular weight molecular_weight412510.0 kDa
Excluded volume excluded_volume505520 ų
Envelope volume envelope_volume773800 ų
Hydration-shell volume shell_volume121900 ų
Envelope diameter envelope_diameter175.2
Shell Rg shell_rg58.39
Envelope Rg envelope_rg49.86
Shape Rg shape_rg49.86
Total Rg total_rg50.02
Total atoms total_atoms28878
Residues n_residues3722
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 dmax165.5
Rg (real space) rg_real50.38
Rg uncertainty (real space) rg_real_error1.31
I(0) (real space) i0_real2.7640e+09
I(0) uncertainty (real space) i0_real_error5.6550e+07
Rg (reciprocal space) rg_reciprocal50.68
I(0) (reciprocal space) i0_reciprocal2765000000.0000
Solution quality estimate total_estimate0.8711
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary64.1
Skewness Skewness skewness0.235
Kurtosis Kurtosis kurtosis-0.342
Angular range angular_range— – 0.1550 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha560700000.0000
Real-space data points n_real_points32
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.834; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.981; Smooth: 0.839

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (10)

8. Citations (1)

9. Files and Curves (10)