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4cro

PROTEIN-DNA CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURE OF A LAMBDA CRO-OPERATOR COMPLEX

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

PROTEIN (LAMBDA CRO)

OrganismNot specified

UniProt P03040

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(*TP*AP*TP*CP*AP*CP*CP*GP*CP*GP*GP*GP*TP*GP*AP*TP*A)-3') ; × 2 Consistent with all polymers
2 Protein–DNA Homooligomer Protein 2 DNA 2 ;DNA (5'-D(*TP*AP*TP*CP*AP*CP*CP*GP*CP*GP*GP*GP*TP*GP*AP*TP*A)-3') ; × 2 Consistent with all polymers
3 Protein–DNA Homooligomer Protein 2 DNA 2 ;DNA (5'-D(*TP*AP*TP*CP*AP*CP*CP*GP*CP*GP*GP*GP*TP*GP*AP*TP*A)-3') ; × 2 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
1orc 2a63 2orc 2ovg

4 assemblies

Homodimer
1cop 1d1l 1d1m 2ecs 2ovg 2ovg 5cro 5cro

8 assemblies

Homotetramer
1d1l 1d1l 2ecs 5cro

4 assemblies

Other homooligomers
5cro

1 assemblies

Heteromeric or nucleic-acid complex
3orc 4cro 4cro 4cro 6cro

5 assemblies

View Construct and Data Evidence
UniProt name RCRO_LAMBD
Isoform —
PDB entities 2
Chains and sequence ranges Author chain A； PDBConstruct 1–66； UniProt 1–66 Author chain B； PDBConstruct 1–66； UniProt 1–66 Author chain C； PDBConstruct 1–66； UniProt 1–66 Author chain D； PDBConstruct 1–66； UniProt 1–66 Author chain E； PDBConstruct 1–66； UniProt 1–66 Author chain F； PDBConstruct 1–66； UniProt 1–66

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_id4cro
Deposition date deposition_date1992-01-15
Structure title titlePROTEIN-DNA CONFORMATIONAL CHANGES IN THE CRYSTAL STRUCTURE OF A LAMBDA CRO-OPERATOR COMPLEX
Keywords keywordsPROTEIN-DNA COMPLEX, DOUBLE HELIX, 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.

4cro__assembly_1__model_1

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

Download this curve (.dat)

4cro__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.

4cro__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）19.58 Å
Rg (electron density)17.97 Å
Total Rg18.44 Å
Atom count32
Residues32
Excluded volume17641 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 4cro__assembly_1__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 4cro__assembly_2__model_1 tetrameric （4） Success 4.1.3-1-20251215 (887e7ef) View Download
3 1 4cro__assembly_3__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 (2)

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6. Fold Classification (SCOP + CATH) 6 domains

SCOP 2.08 (6 domains)

Domain ID domain_idd4croa_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
Domain ID domain_idd4crob_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
Domain ID domain_idd4croc_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
Domain ID domain_idd4crod_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
Domain ID domain_idd4croe_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
Domain ID domain_idd4crof_
Class classa — All alpha proteins
Fold Fold folda.35 — lambda repressor-like DNA-binding domains
Superfamily Superfamily superfamilya.35.1 — lambda repressor-like DNA-binding domains
Family Family familya.35.1.2 — Phage repressors
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7. Citations (3)