8to1

Escherichia coli RNA polymerase unwinding intermediate (I1a) at the lambda PR promoter

Method: ELECTRON MICROSCOPY Dmax: 181.2 Å Quality: GOOD

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

DNA-directed RNA polymerase subunit alpha

Escherichia coli (strain K12)

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 Protein–DNA Heteromer Protein × 7 DNA 2 PDB declaration: nonameric(9) Consistent with all polymer counts Chain G; UniProt 1–329 Chain H; UniProt 1–329 Chain M; UniProt 1–329 Not recorded 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 factor RpoD × 1 (Q0P6L9) Nontemplate strand of lamdba PR promoter DNA × 1 Template strand of lamdba PR promoter DNA × 1 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 4 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE;CHAPSO was added (from 80 mM stock) to 8 mM final in each sample just prior to spray mixing. Resolution 2.80 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 1
Chains and sequence ranges Author chain G; PDBConstruct 1–329; UniProt 1–329 Author chain H; PDBConstruct 1–329; UniProt 1–329 Author chain M; PDBConstruct 1–329; UniProt 1–329

DNA-directed RNA polymerase subunit beta

Escherichia coli (strain K12)

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 Protein–DNA Heteromer Protein × 7 DNA 2 PDB declaration: nonameric(9) Consistent with all polymer counts Chain I; UniProt 1–1342 Not recorded DNA-directed RNA polymerase subunit alpha × 3 (P0A7Z4) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (P0A800) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) Nontemplate strand of lamdba PR promoter DNA × 1 Template strand of lamdba PR promoter DNA × 1 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 4 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE;CHAPSO was added (from 80 mM stock) to 8 mM final in each sample just prior to spray mixing. Resolution 2.80 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 2
Chains and sequence ranges Author chain I; PDBConstruct 1–1342; UniProt 1–1342

;DNA-directed RNA polymerase subunit beta' ;

Escherichia coli (strain K12)

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 Protein–DNA Heteromer Protein × 7 DNA 2 PDB declaration: nonameric(9) Consistent with all polymer counts Chain J; UniProt 1–1407 Not recorded DNA-directed RNA polymerase subunit alpha × 3 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) DNA-directed RNA polymerase subunit omega × 1 (P0A800) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) Nontemplate strand of lamdba PR promoter DNA × 1 Template strand of lamdba PR promoter DNA × 1 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 4 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE;CHAPSO was added (from 80 mM stock) to 8 mM final in each sample just prior to spray mixing. Resolution 2.80 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 3
Chains and sequence ranges Author chain J; PDBConstruct 1–1407; UniProt 1–1407

DNA-directed RNA polymerase subunit omega

Escherichia coli (strain K12)

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 Protein–DNA Heteromer Protein × 7 DNA 2 PDB declaration: nonameric(9) Consistent with all polymer counts Chain K; UniProt 1–91 Not recorded DNA-directed RNA polymerase subunit alpha × 3 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) Nontemplate strand of lamdba PR promoter DNA × 1 Template strand of lamdba PR promoter DNA × 1 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 4 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE;CHAPSO was added (from 80 mM stock) to 8 mM final in each sample just prior to spray mixing. Resolution 2.80 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 4
Chains and sequence ranges Author chain K; PDBConstruct 1–91; UniProt 1–91

RNA polymerase sigma factor RpoD

Escherichia coli (strain K12)

UniProt Q0P6L9

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–DNA Heteromer Protein × 7 DNA 2 PDB declaration: nonameric(9) Consistent with all polymer counts Chain L; UniProt 1–613 Not recorded DNA-directed RNA polymerase subunit alpha × 3 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (P0A800) Nontemplate strand of lamdba PR promoter DNA × 1 Template strand of lamdba PR promoter DNA × 1 4QM (3R,5S,7R,8R,9S,10S,12S,13R,14S,17R)-10,13-dimethyl-17-[(2R)-pentan-2-yl]-2,3,4,5,6,7,8,9,11,12,14,15,16,17-tetradecahydro-1H-cyclopenta[a]phenanthrene-3,7,12-triol × 4 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE;CHAPSO was added (from 80 mM stock) to 8 mM final in each sample just prior to spray mixing. Resolution 2.80 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.

32 other PDB entries and 33 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name Q0P6L9_ECOLX
Isoform
PDB entities 5
Chains and sequence ranges Author chain L; PDBConstruct 1–613; UniProt 1–613

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 8to1

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 8to1
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2. Structure Basics 2. Structure Basics

Entry ID entry_id8to1
Deposition date deposition_date2023-08-02
Structure title titleEscherichia coli RNA polymerase unwinding intermediate (I1a) at the lambda PR promoter
Keywords keywordsDNA-dependent RNA polymerase, transcription, intermediate, DNA promoter, DNA unwinding, transcription-DNA complex; transcription/DNA
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier55.35
Radius of gyration Rg (electron density) rg_electron54.29
Forward intensity I(0) i03070480000.00
Molecular weight molecular_weight448250.0 kDa
Excluded volume excluded_volume555380 ų
Envelope volume envelope_volume863440 ų
Hydration-shell volume shell_volume128500 ų
Envelope diameter envelope_diameter198.4
Shell Rg shell_rg60.01
Envelope Rg envelope_rg53.97
Shape Rg shape_rg54.26
Total Rg total_rg54.54
Total atoms total_atoms31386
Residues n_residues3892
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 dmax181.2
Rg (real space) rg_real55.17
Rg uncertainty (real space) rg_real_error1.56
I(0) (real space) i0_real3.0700e+09
I(0) uncertainty (real space) i0_real_error6.0620e+07
Rg (reciprocal space) rg_reciprocal55.48
I(0) (reciprocal space) i0_reciprocal3072000000.0000
Solution quality estimate total_estimate0.8699
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary71.2
Skewness Skewness skewness0.258
Kurtosis Kurtosis kurtosis-0.277
Angular range angular_range— – 0.1400 −1
Current regularization parameter α current_alpha0.0000
Highest regularization parameter α highest_alpha313600000.0000
Real-space data points n_real_points29
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.852; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.968; Smooth: 0.782

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (10)

8. Citations (2)

9. Files and Curves (10)