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1z1g

Crystal structure of a lambda integrase tetramer bound to a Holliday junction

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

Integrase

Enterobacteria phage lambda

UniProt P03700

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein–DNA Homooligomer Protein 4 DNA 8 29-MER × 1 29-MER × 1 29-MER × 1 29-MER × 1 5'-D(*AP*CP*AP*GP*GP*TP*CP*AP*CP*TP*AP*TP*CP*AP*GP*TP*CP*AP*AP*AP*AP*TP*AP*CP*C)-3' × 2 25-MER × 2 Consistent with all polymers

Other States of the Same Protein in the Database

Monomer
1kjk 2oxo

2 assemblies

Homodimer

None

Homotetramer

None

Other homooligomers
1ae9

1 assemblies

Heteromeric or nucleic-acid complex
1p7d 1p7d 1z19 1z1b 1z1g 2wcc 5j0n

7 assemblies

View Construct and Data Evidence
UniProt name VINT_LAMBD
Isoform —
PDB entities 7
Chains and sequence ranges Author chain A； PDBConstruct 1–356； UniProt 1–356 Author chain B； PDBConstruct 1–356； UniProt 1–356 Author chain C； PDBConstruct 1–356； UniProt 1–356 Author chain D； PDBConstruct 1–356； UniProt 1–356

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_id1z1g
Deposition date deposition_date2005-03-03
Structure title titleCrystal structure of a lambda integrase tetramer bound to a Holliday junction
Keywords keywordsProtein-DNA complex, DNA BINDING PROTEIN-DNA COMPLEX; DNA BINDING PROTEIN/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.

1z1g__assembly_1__model_1

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

Download this curve (.dat)

1z1g__assembly_1__model_1 | I(q)

10-2 10-1 106 107 108 109 q (1/Angstrom) I(q)
100 plotted points; both axes use logarithmic scales.

1z1g__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）43.25 Å
Rg (electron density)42.32 Å
Total Rg42.67 Å
Atom count15156
Residues1558
Excluded volume256010 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1z1g__assembly_1__model_1 dodecameric （12） 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 (7)

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6. Fold Classification (SCOP + CATH) 8 domains

SCOP 2.08 (8 domains)

Domain ID domain_idd1z1ga1
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.10 — DNA-binding domain
Superfamily Superfamily superfamilyd.10.1 — DNA-binding domain
Family Family familyd.10.1.4 — lambda integrase N-terminal domain
Domain ID domain_idd1z1ga2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.163 — DNA breaking-rejoining enzymes
Superfamily Superfamily superfamilyd.163.1 — DNA breaking-rejoining enzymes
Family Family familyd.163.1.1 — Lambda integrase-like, catalytic core
Domain ID domain_idd1z1gb1
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.10 — DNA-binding domain
Superfamily Superfamily superfamilyd.10.1 — DNA-binding domain
Family Family familyd.10.1.4 — lambda integrase N-terminal domain
Domain ID domain_idd1z1gb2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.163 — DNA breaking-rejoining enzymes
Superfamily Superfamily superfamilyd.163.1 — DNA breaking-rejoining enzymes
Family Family familyd.163.1.1 — Lambda integrase-like, catalytic core
Domain ID domain_idd1z1gc1
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.10 — DNA-binding domain
Superfamily Superfamily superfamilyd.10.1 — DNA-binding domain
Family Family familyd.10.1.4 — lambda integrase N-terminal domain
Domain ID domain_idd1z1gc2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.163 — DNA breaking-rejoining enzymes
Superfamily Superfamily superfamilyd.163.1 — DNA breaking-rejoining enzymes
Family Family familyd.163.1.1 — Lambda integrase-like, catalytic core
Domain ID domain_idd1z1gd1
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.10 — DNA-binding domain
Superfamily Superfamily superfamilyd.10.1 — DNA-binding domain
Family Family familyd.10.1.4 — lambda integrase N-terminal domain
Domain ID domain_idd1z1gd2
Class classd — Alpha and beta proteins (a+b)
Fold Fold foldd.163 — DNA breaking-rejoining enzymes
Superfamily Superfamily superfamilyd.163.1 — DNA breaking-rejoining enzymes
Family Family familyd.163.1.1 — Lambda integrase-like, catalytic core
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7. Citations (1)