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9zum

Structure of the Caulobacter crescentus RNAP alpha-CTD bound to AT rich DNA

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

DNA-directed RNA polymerase subunit alpha

Caulobacter vibrioides

UniProt Q9A8S9

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count
2 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count
3 Protein–DNA Monomer Protein 1 DNA 2 ;DNA (5'-D(*AP*AP*TP*TP*AP*AP*TP*TP*AP*AP*TP*TP*TP*TP*AP*AP*TP*T)-3') ; × 1 ;DNA (5'-D(*AP*AP*TP*TP*AP*AP*AP*AP*TP*TP*AP*AP*TP*TP*AP*AP*TP*T)-3') ; × 1 water × 3 Consistent with all polymers
4 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count
5 Protein monomer Monomer Protein 1 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
9zum 9zum 9zum 9zum

4 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
9pfq 9pfv 9pga 9pgh 9zum

5 assemblies

View Construct and Data Evidence
UniProt name RPOA_CAUVC
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 5–83； UniProt 251–329 Author chain B； PDBConstruct 5–83； UniProt 251–329 Author chain C； PDBConstruct 5–83； UniProt 251–329 Author chain D； PDBConstruct 5–83； UniProt 251–329 Author chain E； PDBConstruct 5–83； UniProt 251–329

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_id9zum
Deposition date deposition_date2025-12-24
Last revision last_revision2026-02-25
Structure title titleStructure of the Caulobacter crescentus RNAP alpha-CTD bound to AT rich DNA
Keywords keywordsalphaCTD, RNA polymerase, AT rich DNA, DNA binding, DNA BINDING PROTEIN, DNA BINDING PROTEIN-DNA complex; DNA BINDING PROTEIN/DNA
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.

9zum__assembly_3__model_1

Assembly 3 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

9zum__assembly_3__model_1 | I(q)

10-2 10-1 105 106 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

9zum__assembly_3__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）18.55 Å
Rg (electron density)17.84 Å
Total Rg18.59 Å
Atom count1004
Residues98
Excluded volume16760 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 9zum__assembly_1__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 9zum__assembly_2__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 9zum__assembly_3__model_1 trimeric （3） Success 4.1.3-1-20251215 (887e7ef) View Download
4 1 9zum__assembly_4__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
5 1 9zum__assembly_5__model_1 monomeric （1） 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 (4)

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7. Citations (1)