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3bdn

Crystal Structure of the Lambda Repressor

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

Lambda Repressor

Enterobacteria phage lambda

UniProt P03034

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 2 DNA 2 ;DNA (5'-D(*DAP*DAP*DTP*DAP*DCP*DCP*DAP*DCP*DTP*DGP*DGP*DCP*DGP*DGP*DTP*DGP*DAP*DTP*DAP*DT)-3') ; × 1 ;DNA (5'-D(*DTP*DAP*DTP*DAP*DTP*DCP*DAP*DCP*DCP*DGP*DCP*DCP*DAP*DGP*DTP*DGP*DGP*DTP*DAP*DT)-3') ; × 1 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
3kz3 3kz3

2 assemblies

Homodimer
1lrp 1lrp 3kz3

3 assemblies

Homotetramer
1f39

1 assemblies

Other homooligomers
1kca 1kca

2 assemblies

Heteromeric or nucleic-acid complex
1lli 1lmb 1rio 3bdn 3woa 5zca 7jvt 8gmu

8 assemblies

View Construct and Data Evidence
UniProt name RPC1_LAMBD
Isoform —
PDB entities 3
Chains and sequence ranges Author chain A； PDBConstruct 1–236； UniProt 2–237 Author chain B； PDBConstruct 1–236； UniProt 2–237

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_id3bdn
Deposition date deposition_date2007-11-15
Structure title titleCrystal Structure of the Lambda Repressor
Keywords keywordslambda, repressor, allostery, cooperativity, DNA binding, 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.

3bdn__assembly_1__model_1

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

Download this curve (.dat)

3bdn__assembly_1__model_1 | I(q)

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

3bdn__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）29.32 Å
Rg (electron density)28.17 Å
Total Rg29.00 Å
Atom count4405
Residues506
Excluded volume76104 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 3bdn__assembly_1__model_1 tetrameric （4） 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 (3)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id3bdnA01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
Domain ID domain_id3bdnA02
Class class2 — Mainly Beta
Architecture architecture10 — Ribbon
Topology topology109 — Umud Fragment, subunit A
Homologous superfamily homologous superfamily10 — Umud Fragment, subunit A
Domain ID domain_id3bdnB01
Class class1 — Mainly Alpha
Architecture architecture10 — Orthogonal Bundle
Topology topology260 — 434 Repressor (Amino-terminal Domain)
Homologous superfamily homologous superfamily40 — lambda repressor-like DNA-binding domains
Domain ID domain_id3bdnB02
Class class2 — Mainly Beta
Architecture architecture10 — Ribbon
Topology topology109 — Umud Fragment, subunit A
Homologous superfamily homologous superfamily10 — Umud Fragment, subunit A
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7. Citations (1)