7c97

Cryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo) with SspA

Method: ELECTRON MICROSCOPY Dmax: 179.8 Å Quality: GOOD

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

Stringent starvation protein A

Escherichia coli

UniProt H4IXP2

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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain I; UniProt 1–212 Chain J; UniProt 1–212 Not recorded DNA (63-mer) × 1 DNA-directed RNA polymerase subunit alpha × 3 (F4VJT6) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (M9GTE2) DNA-directed RNA polymerase subunit omega × 1 (T9C803) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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 H4IXP2_ECOLX
Isoform
PDB entities 2
Chains and sequence ranges Author chain I; PDBConstruct 1–212; UniProt 1–212 Author chain J; PDBConstruct 1–212; UniProt 1–212

DNA-directed RNA polymerase subunit alpha

Escherichia coli

UniProt F4VJT6

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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain A; UniProt 1–329 Chain B; UniProt 1–329 Chain K; UniProt 1–329 Not recorded DNA (63-mer) × 1 Stringent starvation protein A × 2 (H4IXP2) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (M9GTE2) DNA-directed RNA polymerase subunit omega × 1 (T9C803) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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 F4VJT6_ECOLX
Isoform
PDB entities 3
Chains and sequence ranges Author chain A; PDBConstruct 1–329; UniProt 1–329 Author chain B; PDBConstruct 1–329; UniProt 1–329 Author chain K; 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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain C; UniProt 1–1342 Mutation:D516V DNA (63-mer) × 1 Stringent starvation protein A × 2 (H4IXP2) DNA-directed RNA polymerase subunit alpha × 3 (F4VJT6) ;DNA-directed RNA polymerase subunit beta' ; × 1 (M9GTE2) DNA-directed RNA polymerase subunit omega × 1 (T9C803) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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 4
Chains and sequence ranges Author chain C; PDBConstruct 1–1342; UniProt 1–1342

;DNA-directed RNA polymerase subunit beta' ;

Escherichia coli

UniProt M9GTE2

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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain D; UniProt 1–1407 Not recorded DNA (63-mer) × 1 Stringent starvation protein A × 2 (H4IXP2) DNA-directed RNA polymerase subunit alpha × 3 (F4VJT6) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) DNA-directed RNA polymerase subunit omega × 1 (T9C803) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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 M9GTE2_ECOLX
Isoform
PDB entities 5
Chains and sequence ranges Author chain D; PDBConstruct 1–1407; UniProt 1–1407

DNA-directed RNA polymerase subunit omega

Escherichia coli

UniProt T9C803

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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain E; UniProt 1–91 Not recorded DNA (63-mer) × 1 Stringent starvation protein A × 2 (H4IXP2) DNA-directed RNA polymerase subunit alpha × 3 (F4VJT6) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (M9GTE2) RNA polymerase sigma factor RpoD × 1 (Q0P6L9) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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.

1 other PDB entries and 1 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name T9C803_ECOLX
Isoform
PDB entities 6
Chains and sequence ranges Author chain E; PDBConstruct 1–91; UniProt 1–91

RNA polymerase sigma factor RpoD

Escherichia coli

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 × 9 DNA 2 PDB declaration: undecameric(11) Consistent with all polymer counts Chain F; UniProt 1–613 Not recorded DNA (63-mer) × 1 Stringent starvation protein A × 2 (H4IXP2) DNA-directed RNA polymerase subunit alpha × 3 (F4VJT6) DNA-directed RNA polymerase subunit beta × 1 (P0A8V2) ;DNA-directed RNA polymerase subunit beta' ; × 1 (M9GTE2) DNA-directed RNA polymerase subunit omega × 1 (T9C803) DNA (63-mer) × 1 MG MAGNESIUM ION × 1 ZN ZINC ION × 2 ELECTRON MICROSCOPY cryo-EM buffer:pH 7.9 cryo-EM vitrification conditions:Cryogen ETHANE Resolution 3.68 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 7
Chains and sequence ranges Author chain F; 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 7c97

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 7c97
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2. Structure Basics 2. Structure Basics

Entry ID entry_id7c97
Deposition date deposition_date2020-06-05
Structure title titleCryo-EM structure of an Escherichia coli RNAP-promoter open complex (RPo) with SspA
Keywords keywordsStringent starvation protein A, RNA polymerase, promoter escape, zinc binding domain, GENE REGULATION, TRANSFERASE-DNA complex; TRANSFERASE/DNA
Experimental Method methodELECTRON MICROSCOPY

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

Radius of gyration Rg (Guinier) rg_guinier55.74
Radius of gyration Rg (electron density) rg_electron55.10
Forward intensity I(0) i03934560000.00
Molecular weight molecular_weight501010.0 kDa
Excluded volume excluded_volume617180 ų
Envelope volume envelope_volume950610 ų
Hydration-shell volume shell_volume138630 ų
Envelope diameter envelope_diameter189.8
Shell Rg shell_rg61.82
Envelope Rg envelope_rg54.08
Shape Rg shape_rg55.09
Total Rg total_rg55.27
Total atoms total_atoms35581
Residues n_residues4275
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 dmax179.8
Rg (real space) rg_real55.51
Rg uncertainty (real space) rg_real_error1.15
I(0) (real space) i0_real3.9350e+09
I(0) uncertainty (real space) i0_real_error7.1020e+07
Rg (reciprocal space) rg_reciprocal55.92
I(0) (reciprocal space) i0_reciprocal3937000000.0000
Solution quality estimate total_estimate0.8757
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks1
Primary peak position r_peak_primary70.6
Skewness Skewness skewness0.209
Kurtosis Kurtosis kurtosis-0.373
Angular range angular_range— – 0.1400 −1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha569100000.0000
Real-space data points n_real_points29
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.871; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.959; Smooth: 0.806

5. Crystallography and Experiment 5. Crystallography & Experiment

6. Entities and Polymers Entities & Polymers (10)

7. Fold Classification (SCOP + CATH) 5 domains

CATH v4.4 (5 domains)

Domain ID domain_id7c97A01
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_id7c97B01
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_id7c97C01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily150 — RNA polymerase II, Rpb2 subunit, wall domain
Domain ID domain_id7c97D01
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_id7c97D02
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology50 — OB fold (Dihydrolipoamide Acetyltransferase, E2P)
Homologous superfamily homologous superfamily100 — RNA polymerase II/Efflux pump adaptor protein, barrel-sandwich hybrid domain

8. Citations (1)

9. Files and Curves (10)