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1r71

Crystal Structure of the DNA binding domain of KorB in complex with the operator DNA

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

Transcriptional repressor protein korB

Escherichia coli

UniProt P07674

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 2 DNA 4 5'-D(*AP*(BRU)P*TP*TP*TP*AP*GP*CP*GP*GP*CP*TP*AP*AP*AP*AP*G)-3' × 2 5'-D(*CP*(BRU)P*TP*TP*TP*AP*GP*CP*CP*GP*CP*TP*AP*AP*AP*AP*(BRU))-3' × 2 water × 6 Consistent with all polymers
2 Protein–DNA Homooligomer Protein 2 DNA 4 5'-D(*AP*(BRU)P*TP*TP*TP*AP*GP*CP*GP*GP*CP*TP*AP*AP*AP*AP*G)-3' × 2 5'-D(*CP*(BRU)P*TP*TP*TP*AP*GP*CP*CP*GP*CP*TP*AP*AP*AP*AP*(BRU))-3' × 2 water × 6 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer

None

Homodimer
1igq 1igq 1igu 8qa8 8qa8 8qa8

6 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
1r71 1r71 8qa9

3 assemblies

View Construct and Data Evidence
UniProt name KORB2_ECOLI
Isoform —
PDB entities 3
Chains and sequence ranges Author chain A； PDBConstruct 1–178； UniProt 117–294 Author chain B； PDBConstruct 1–178； UniProt 117–294 Author chain C； PDBConstruct 1–178； UniProt 117–294 Author chain D； PDBConstruct 1–178； UniProt 117–294

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_id1r71
Deposition date deposition_date2003-10-17
Structure title titleCrystal Structure of the DNA binding domain of KorB in complex with the operator DNA
Keywords keywords;IncP, plasmid partitioning, protein-DNA complex, heilx-turn-helix motif, transcription factor, ParB homologue, TRANSCRIPTION-DNA COMPLEX ;; TRANSCRIPTION/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.

1r71__assembly_1__model_1

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

Download this curve (.dat)

1r71__assembly_1__model_1 | I(q)

10-2 10-1 105 106 107 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1r71__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）21.66 Å
Rg (electron density)21.26 Å
Total Rg21.95 Å
Atom count2535
Residues261
Excluded volume42941 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1r71__assembly_1__model_1 hexameric （6） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 1r71__assembly_2__model_1 hexameric （6） 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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6. Fold Classification (SCOP + CATH) 12 domains

SCOP 2.08 (4 domains)

Domain ID domain_idd1r71a_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.14 — KorB DNA-binding domain-like
Family Family familya.4.14.1 — KorB DNA-binding domain-like
Domain ID domain_idd1r71b_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.14 — KorB DNA-binding domain-like
Family Family familya.4.14.1 — KorB DNA-binding domain-like
Domain ID domain_idd1r71c_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.14 — KorB DNA-binding domain-like
Family Family familya.4.14.1 — KorB DNA-binding domain-like
Domain ID domain_idd1r71d_
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.14 — KorB DNA-binding domain-like
Family Family familya.4.14.1 — KorB DNA-binding domain-like

CATH v4.4 (8 domains)

Domain ID domain_id1r71A01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily730 — KorB DNA-binding domain
Domain ID domain_id1r71A02
Class class6 — Special
Architecture architecture10 — Helix non-globular
Topology topology250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily140 —
Domain ID domain_id1r71B01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily730 — KorB DNA-binding domain
Domain ID domain_id1r71B02
Class class6 — Special
Architecture architecture10 — Helix non-globular
Topology topology250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily140 —
Domain ID domain_id1r71C01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily730 — KorB DNA-binding domain
Domain ID domain_id1r71C02
Class class6 — Special
Architecture architecture10 — Helix non-globular
Topology topology250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily140 —
Domain ID domain_id1r71D01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology10 — Arc Repressor Mutant, subunit A
Homologous superfamily homologous superfamily730 — KorB DNA-binding domain
Domain ID domain_id1r71D02
Class class6 — Special
Architecture architecture10 — Helix non-globular
Topology topology250 — Single alpha-helices involved in coiled-coils or other helix-helix interfaces
Homologous superfamily homologous superfamily140 —
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7. Citations (1)