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3e5u

OCPA complexed CprK (C200S)

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

Cyclic nucleotide-binding protein

Desulfitobacterium hafniense

UniProt Q18R04

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 (3-CHLORO-4-HYDROXYPHENYL)ACETIC ACID × 2 PHOSPHATE ION × 2 water × 2 Consistent with protein count
2 Protein homooligomer Homooligomer Protein 2 (3-CHLORO-4-HYDROXYPHENYL)ACETIC ACID × 3 PHOSPHATE ION × 1 SODIUM ION × 1 water × 2 Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
3e5q 3e5q 3e5q 3e5u 3e5u 3e5x 3e5x 3e6b 3e6d

9 assemblies

Homotetramer
2h6b

1 assemblies

Other homooligomers
2h6b

1 assemblies

Heteromeric or nucleic-acid complex
3e6c

1 assemblies

View Construct and Data Evidence
UniProt name Q18R04_DESHD
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–232； UniProt 1–232 Author chain B； PDBConstruct 1–232； UniProt 1–232 Author chain C； PDBConstruct 1–232； UniProt 1–232 Author chain D； PDBConstruct 1–232； UniProt 1–232

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_id3e5u
Deposition date deposition_date2008-08-14
Structure title titleOCPA complexed CprK (C200S)
Keywords keywordsCprK, Halorespiration, transcriptional regulator, TRANSCRIPTION REGULATION; TRANSCRIPTION REGULATION
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.

3e5u__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

3e5u__assembly_2__model_1 | I(q)

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

3e5u__assembly_2__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）23.95 Å
Rg (electron density)22.63 Å
Total Rg23.61 Å
Atom count3502
Residues433
Excluded volume63192 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3e5u__assembly_1__model_1 dimeric （2） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 3e5u__assembly_2__model_1 dimeric （2） 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 (5)

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6. Fold Classification (SCOP + CATH) 16 domains

SCOP 2.08 (8 domains)

Domain ID domain_idd3e5ua1
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.4 — CAP C-terminal domain-like
Domain ID domain_idd3e5ua2
Class classb — All beta proteins
Fold Fold foldb.82 — Double-stranded beta-helix
Superfamily Superfamily superfamilyb.82.3 — cAMP-binding domain-like
Family Family familyb.82.3.2 — cAMP-binding domain
Domain ID domain_idd3e5ub1
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.4 — CAP C-terminal domain-like
Domain ID domain_idd3e5ub2
Class classb — All beta proteins
Fold Fold foldb.82 — Double-stranded beta-helix
Superfamily Superfamily superfamilyb.82.3 — cAMP-binding domain-like
Family Family familyb.82.3.2 — cAMP-binding domain
Domain ID domain_idd3e5uc1
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.4 — CAP C-terminal domain-like
Domain ID domain_idd3e5uc2
Class classb — All beta proteins
Fold Fold foldb.82 — Double-stranded beta-helix
Superfamily Superfamily superfamilyb.82.3 — cAMP-binding domain-like
Family Family familyb.82.3.2 — cAMP-binding domain
Domain ID domain_idd3e5ud1
Class classa — All alpha proteins
Fold Fold folda.4 — DNA/RNA-binding 3-helical bundle
Superfamily Superfamily superfamilya.4.5 — 'Winged helix' DNA-binding domain
Family Family familya.4.5.4 — CAP C-terminal domain-like
Domain ID domain_idd3e5ud2
Class classb — All beta proteins
Fold Fold foldb.82 — Double-stranded beta-helix
Superfamily Superfamily superfamilyb.82.3 — cAMP-binding domain-like
Family Family familyb.82.3.2 — cAMP-binding domain

CATH v4.4 (8 domains)

Domain ID domain_id3e5uA01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily10 — Jelly Rolls
Domain ID domain_id3e5uA02
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_id3e5uB01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily10 — Jelly Rolls
Domain ID domain_id3e5uB02
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_id3e5uC01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily10 — Jelly Rolls
Domain ID domain_id3e5uC02
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_id3e5uD01
Class class2 — Mainly Beta
Architecture architecture60 — Sandwich
Topology topology120 — Jelly Rolls
Homologous superfamily homologous superfamily10 — Jelly Rolls
Domain ID domain_id3e5uD02
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)