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2adn

Solution structure of the bacterial antitoxin CcdA: Implications for DNA and toxin binding

Method: SOLUTION NMR
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1. Protein Identity and Related Structures Protein Identity & Related Structures

CcdA

Escherichia coli

UniProt Q9S0Z5

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein homooligomer Homooligomer Protein 2 No other associated polymer Consistent with protein count

Other States of the Same Protein in the Database

Monomer

None

Homodimer
2adl 2adn

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex
2h3a 2h3c

2 assemblies

View Construct and Data Evidence
UniProt name Q9S0Z5_ECOLI
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–72； UniProt 1–72 Author chain B； PDBConstruct 1–72； UniProt 1–72

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_id2adn
Deposition date deposition_date2005-07-20
Structure title titleSolution structure of the bacterial antitoxin CcdA: Implications for DNA and toxin binding
Keywords keywordsribbon-helix-helix, DNA BINDING PROTEIN; DNA BINDING PROTEIN
Experimental Method methodSOLUTION NMR
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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.

2adn__assembly_1__model_1

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

Download this curve (.dat)

2adn__assembly_1__model_1 | I(q)

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

2adn__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）19.36 Å
Rg (electron density)18.50 Å
Total Rg19.38 Å
Atom count2326
Residues144
Excluded volume20658 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 2adn__assembly_1__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 (1)

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7. Citations (1)