6r9b

Cryo-EM structure of bacterial RNAP with a DNA mimic protein Ocr from T7 phage

Method: ELECTRON MICROSCOPY Dmax: 161.6 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 heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain A; UniProt 1–329 Chain B; 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 (F4NQ47) Overcome classical restriction gp0.3 × 2 (P03775) ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 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 A; PDBConstruct 1–329; UniProt 1–329 Author chain B; 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 heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain C; UniProt 1–1342 Not recorded DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (F4NQ47) Overcome classical restriction gp0.3 × 2 (P03775) ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 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 C; 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 heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain D; UniProt 1–1407 Not recorded DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) DNA-directed RNA polymerase subunit omega × 1 (F4NQ47) Overcome classical restriction gp0.3 × 2 (P03775) ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 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 D; PDBConstruct 1–1407; UniProt 1–1407

DNA-directed RNA polymerase subunit omega

Escherichia coli K-12

UniProt F4NQ47

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 heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain E; UniProt 1–80 Not recorded DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) Overcome classical restriction gp0.3 × 2 (P03775) ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 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.

No other PDB entry for the same UniProt protein was found.

View Construct and Data Evidence
UniProt name F4NQ47_ECOLX
Isoform
PDB entities 4
Chains and sequence ranges Author chain E; PDBConstruct 1–80; UniProt 1–80

Overcome classical restriction gp0.3

Enterobacteria phage T7

UniProt P03775

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 heterocomplex Heteromer Protein × 7 PDB declaration: heptameric(7) Consistent with protein copy count Chain F; UniProt 1–117 Chain G; UniProt 1–117 Not recorded DNA-directed RNA polymerase subunit alpha × 2 (P0A7Z4) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (P0A8T7) DNA-directed RNA polymerase subunit omega × 1 (F4NQ47) ELECTRON MICROSCOPY cryo-EM buffer:pH 8 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.80 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.

10 other PDB entries and 12 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name OCR_BPT7
Isoform
PDB entities 5
Chains and sequence ranges Author chain F; PDBConstruct 1–117; UniProt 1–117 Author chain G; PDBConstruct 1–117; UniProt 1–117

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 6r9b

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 6r9b
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2. Structure Basics 2. Structure Basics

Entry ID entry_id6r9b
Deposition date deposition_date2019-04-03
Structure title titleCryo-EM structure of bacterial RNAP with a DNA mimic protein Ocr from T7 phage
Keywords keywordsTRANSCRIPTION, RNA polymerase, Ocr, transcription inhibition, bacteriophage T7; TRANSCRIPTION
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier49.73
Radius of gyration Rg (electron density) rg_electron49.06
Forward intensity I(0) i02045880000.00
Molecular weight molecular_weight368330.0 kDa
Excluded volume excluded_volume457800 ų
Envelope volume envelope_volume722360 ų
Hydration-shell volume shell_volume116250 ų
Envelope diameter envelope_diameter171.8
Shell Rg shell_rg57.52
Envelope Rg envelope_rg48.78
Shape Rg shape_rg49.08
Total Rg total_rg49.31
Total atoms total_atoms25880
Residues n_residues3401
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 dmax161.6
Rg (real space) rg_real49.46
Rg uncertainty (real space) rg_real_error0.84
I(0) (real space) i0_real2.0460e+09
I(0) uncertainty (real space) i0_real_error3.2080e+07
Rg (reciprocal space) rg_reciprocal49.73
I(0) (reciprocal space) i0_reciprocal2047000000.0000
Solution quality estimate total_estimate0.8701
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary60.6
Skewness Skewness skewness0.244
Kurtosis Kurtosis kurtosis-0.311
Angular range angular_range— – 0.1600 −1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha395600000.0000
Real-space data points n_real_points33
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.838; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.972; Smooth: 0.820

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (5)

7. Fold Classification (SCOP + CATH) 8 domains

CATH v4.4 (8 domains)

Domain ID domain_id6r9bA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology1360 — Gyrase A; domain 2
Homologous superfamily homologous superfamily10 — RNA polymerase, RBP11-like subunit
Domain ID domain_id6r9bA02
Class class2 — Mainly Beta
Architecture architecture170 — Beta Complex
Topology topology120 — RNA Polymerase Alpha Subunit; Chain A, domain 2
Homologous superfamily homologous superfamily12 — DNA-directed RNA polymerase, insert domain
Domain ID domain_id6r9bB01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology1360 — Gyrase A; domain 2
Homologous superfamily homologous superfamily10 — RNA polymerase, RBP11-like subunit
Domain ID domain_id6r9bB02
Class class2 — Mainly Beta
Architecture architecture170 — Beta Complex
Topology topology120 — RNA Polymerase Alpha Subunit; Chain A, domain 2
Homologous superfamily homologous superfamily12 — DNA-directed RNA polymerase, insert domain
Domain ID domain_id6r9bD01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology132 — Topoisomerase I; Chain A, domain 4
Homologous superfamily homologous superfamily30 — RNA polymerase Rpb1 funnel domain
Domain ID domain_id6r9bE00
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology940 — Eukaryotic RPB6 RNA polymerase subunit
Homologous superfamily homologous superfamily10 — RNA polymerase subunit, RPB6/omega
Domain ID domain_id6r9bF00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily780 — DNA mimic ocr
Domain ID domain_id6r9bG00
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily780 — DNA mimic ocr

8. Citations (1)

9. Files and Curves (10)