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4oio

Crystal structure of Thermus thermophilus pre-insertion substrate complex for de novo transcription initiation

Method: X-RAY DIFFRACTION
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1. Protein Identity and Related Structures Protein Identity & Related Structures

DNA-directed RNA polymerase subunit alpha

OrganismNot specified

UniProt Q5SHR6

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 6 DNA 2 DNA-directed RNA polymerase subunit beta × 1 （Q8RQE9） ;DNA-directed RNA polymerase subunit beta' ; × 1 （Q8RQE8） DNA-directed RNA polymerase subunit omega × 1 （Q8RQE7） DNA directed RNA polymerase sigma factor A × 1 （Q5SKW1） 5'-D(*CP*CP*TP*GP*CP*AP*TP*CP*CP*GP*TP*GP*AP*GP*TP*CP*GP*AP*GP*GP*G)-3' × 1 5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*TP*GP*TP*CP*AP*CP*GP*GP*AP*TP*GP*CP*AP*GP*G)-3' × 1 ZINC ION × 2 MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 1 5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine × 1 water × 8 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1zyr 1zyr 2a6e 2a6e 2a6h 2a6h 2cw0 2cw0 2o5i 2o5i 2o5j 2o5j

95 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name RPOA_THET8
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–315； UniProt 1–315 Author chain B； PDBConstruct 1–315； UniProt 1–315

DNA-directed RNA polymerase subunit beta

OrganismNot specified

UniProt Q8RQE9

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 6 DNA 2 DNA-directed RNA polymerase subunit alpha × 2 （Q5SHR6） ;DNA-directed RNA polymerase subunit beta' ; × 1 （Q8RQE8） DNA-directed RNA polymerase subunit omega × 1 （Q8RQE7） DNA directed RNA polymerase sigma factor A × 1 （Q5SKW1） 5'-D(*CP*CP*TP*GP*CP*AP*TP*CP*CP*GP*TP*GP*AP*GP*TP*CP*GP*AP*GP*GP*G)-3' × 1 5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*TP*GP*TP*CP*AP*CP*GP*GP*AP*TP*GP*CP*AP*GP*G)-3' × 1 ZINC ION × 2 MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 1 5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine × 1 water × 8 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1smy 1smy 1zyr 1zyr 2a68 2a68 2a69 2a69 2a6e 2a6e 2a6h 2a6h

147 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name RPOB_THET8
Isoform —
PDB entities 2
Chains and sequence ranges Author chain C； PDBConstruct 1–1119； UniProt 1–1119

;DNA-directed RNA polymerase subunit beta' ;

OrganismNot specified

UniProt Q8RQE8

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 6 DNA 2 DNA-directed RNA polymerase subunit alpha × 2 （Q5SHR6） DNA-directed RNA polymerase subunit beta × 1 （Q8RQE9） DNA-directed RNA polymerase subunit omega × 1 （Q8RQE7） DNA directed RNA polymerase sigma factor A × 1 （Q5SKW1） 5'-D(*CP*CP*TP*GP*CP*AP*TP*CP*CP*GP*TP*GP*AP*GP*TP*CP*GP*AP*GP*GP*G)-3' × 1 5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*TP*GP*TP*CP*AP*CP*GP*GP*AP*TP*GP*CP*AP*GP*G)-3' × 1 ZINC ION × 2 MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 1 5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine × 1 water × 8 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1smy 1smy 1zyr 1zyr 2a68 2a68 2a69 2a69 2a6e 2a6e 2a6h 2a6h

133 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name RPOC_THET8
Isoform —
PDB entities 3
Chains and sequence ranges Author chain D； PDBConstruct 1–1524； UniProt 1–1524

DNA-directed RNA polymerase subunit omega

OrganismNot specified

UniProt Q8RQE7

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 6 DNA 2 DNA-directed RNA polymerase subunit alpha × 2 （Q5SHR6） DNA-directed RNA polymerase subunit beta × 1 （Q8RQE9） ;DNA-directed RNA polymerase subunit beta' ; × 1 （Q8RQE8） DNA directed RNA polymerase sigma factor A × 1 （Q5SKW1） 5'-D(*CP*CP*TP*GP*CP*AP*TP*CP*CP*GP*TP*GP*AP*GP*TP*CP*GP*AP*GP*GP*G)-3' × 1 5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*TP*GP*TP*CP*AP*CP*GP*GP*AP*TP*GP*CP*AP*GP*G)-3' × 1 ZINC ION × 2 MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 1 5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine × 1 water × 8 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1zyr 1zyr 2a6e 2a6e 2a6h 2a6h 2be5 2be5 2cw0 2cw0 2o5i 2o5i

113 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name RPOZ_THET8
Isoform —
PDB entities 4
Chains and sequence ranges Author chain E； PDBConstruct 1–99； UniProt 1–99

DNA directed RNA polymerase sigma factor A

Thermus thermophilus

UniProt Q5SKW1

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Heteromer Protein 6 DNA 2 DNA-directed RNA polymerase subunit alpha × 2 （Q5SHR6） DNA-directed RNA polymerase subunit beta × 1 （Q8RQE9） ;DNA-directed RNA polymerase subunit beta' ; × 1 （Q8RQE8） DNA-directed RNA polymerase subunit omega × 1 （Q8RQE7） 5'-D(*CP*CP*TP*GP*CP*AP*TP*CP*CP*GP*TP*GP*AP*GP*TP*CP*GP*AP*GP*GP*G)-3' × 1 5'-D(*TP*AP*TP*AP*AP*TP*GP*GP*GP*AP*GP*CP*TP*GP*TP*CP*AP*CP*GP*GP*AP*TP*GP*CP*AP*GP*G)-3' × 1 ZINC ION × 2 MAGNESIUM ION × 2 ADENOSINE-5'-TRIPHOSPHATE × 1 5'-O-[(S)-hydroxy{[(S)-hydroxy(phosphonooxy)phosphoryl]methyl}phosphoryl]cytidine × 1 water × 8 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1zyr 1zyr 2a6e 2a6e 2a6h 2a6h 2be5 2be5 2cw0 2cw0 3dxj 3dxj

74 assemblies; showing the first 12

View Construct and Data Evidence
UniProt name Q5SKW1_THET8
Isoform —
PDB entities 5
Chains and sequence ranges Author chain F； PDBConstruct 21–443； UniProt 1–423

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.

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2. Structure Basics 2. Structure Basics

Entry ID entry_id4oio
Deposition date deposition_date2014-01-20
Structure title titleCrystal structure of Thermus thermophilus pre-insertion substrate complex for de novo transcription initiation
Keywords keywords;de novo transcription initiation, substrate complex, transcription initiation, i site, i+1 site, RNA polymerase, DNA/RNA/NTP binding, polymerization of ribonucleotides, nucleoid, TRANSCRIPTION, TRANSFERASE ;; TRANSCRIPTION, TRANSFERASE
Experimental Method methodX-RAY DIFFRACTION
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3. Official assembly/model SAXS Official SAXS Profiles

This page reads only the latest assembly calculations. Every curve maps to an explicit PDB entry, official biological assembly and coordinate model.

4oio__assembly_1__model_1

Assembly 1 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

4oio__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 109 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

4oio__assembly_1__model_1 | P(r) · Pending

The new assembly/model P(r) has not been calculated yet This placeholder does not display legacy data r (Angstrom) P(r)
P(r) will be calculated and displayed separately for the same assembly/model.
Rg（Guinier）51.88 Å
Rg (electron density)52.75 Å
Total Rg52.71 Å
Atom count28425
Residues3516
Excluded volume505180 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 4oio__assembly_1__model_1 octameric （8） Success 4.1.3-1-20251215 (887e7ef) View Download
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4. Crystallography and Experiment 4. Crystallography & Experiment

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5. Entities and Polymers Entities & Polymers (12)

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6. Fold Classification (SCOP + CATH) 21 domains

SCOP 2.08 (6 domains)

Domain ID domain_idd4oioc_
Class classe — Multi-domain proteins (alpha and beta)
Fold Fold folde.29 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Superfamily Superfamily superfamilye.29.1 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Family Family familye.29.1.1 — RNA-polymerase beta
Domain ID domain_idd4oiod_
Class classe — Multi-domain proteins (alpha and beta)
Fold Fold folde.29 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Superfamily Superfamily superfamilye.29.1 — beta and beta-prime subunits of DNA dependent RNA-polymerase
Family Family familye.29.1.2 — RNA-polymerase beta-prime
Domain ID domain_idd4oioe_
Class classa — All alpha proteins
Fold Fold folda.143 — RPB6/omega subunit-like
Superfamily Superfamily superfamilya.143.1 — RPB6/omega subunit-like
Family Family familya.143.1.1 — RNA polymerase omega subunit
Domain ID domain_idd4oiof1
Class classa — All alpha proteins
Fold Fold folda.177 — Sigma2 domain of RNA polymerase sigma factors
Superfamily Superfamily superfamilya.177.1 — Sigma2 domain of RNA polymerase sigma factors
Family Family familya.177.1.0 — automated matches
Domain ID domain_idd4oiof2
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.13 — Sigma3 and sigma4 domains of RNA polymerase sigma factors
Family Family familya.4.13.0 — automated matches
Domain ID domain_idd4oiof3
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.13 — Sigma3 and sigma4 domains of RNA polymerase sigma factors
Family Family familya.4.13.0 — automated matches

CATH v4.4 (15 domains)

Domain ID domain_id4oioA01
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_id4oioA02
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_id4oioB01
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_id4oioB02
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_id4oioC01
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology270 — Dna-directed Rna Polymerase Ii 140kd Polypeptide; Chain: B; Domain 6
Homologous superfamily homologous superfamily10 — DNA-directed RNA polymerase, subunit 2, domain 6
Domain ID domain_id4oioC03
Class class3 — Alpha Beta
Architecture architecture90 — Alpha-Beta Complex
Topology topology1110 — Dna-directed Rna Polymerase Ii 140kd Polypeptide; Chain: B; domain 3
Homologous superfamily homologous superfamily10 — RNA polymerase Rpb2, domain 2
Domain ID domain_id4oioC04
Class class2 — Mainly Beta
Architecture architecture30 — Roll
Topology topology150 — Rna Polymerase Beta Subunit; Chain: C, domain 4
Homologous superfamily homologous superfamily10 — DNA-directed RNA polymerase, beta subunit, external 1 domain
Domain ID domain_id4oioC05
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
Domain ID domain_id4oioC06
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_id4oioD01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology274 — Enzyme I; Chain A, domain 2
Homologous superfamily homologous superfamily100 — RNA polymerase Rpb1, domain 3
Domain ID domain_id4oioD02
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_id4oioE00
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_id4oioF01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology120 — Four Helix Bundle (Hemerythrin (Met), subunit A)
Homologous superfamily homologous superfamily1810 —
Domain ID domain_id4oioF02
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
Domain ID domain_id4oioF03
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily10 — Winged helix-like DNA-binding domain superfamily/Winged helix DNA-binding domain
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7. Citations (1)