5nlb

Crystal structure of human CUL3 N-terminal domain bound to KEAP1 BTB and 3-box

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

Kelch-like ECH-associated protein 1

Homo sapiens

UniProt Q14145

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 Cullin-3 × 2 (Q13618) Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name KEAP1_HUMAN
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A; PDBConstruct 1–154; UniProt 51–204

Cullin-3

Homo sapiens

UniProt Q13618

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein heterocomplex Heteromer Protein 4 Kelch-like ECH-associated protein 1 × 2 (Q14145) Consistent with protein count

Other States of the Same Protein in the Database

View Construct and Data Evidence
UniProt name CUL3_HUMAN
Isoform —
PDB entities 2
Chains and sequence ranges Author chain B; PDBConstruct 1–356; UniProt 26–381

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_id5nlb
Deposition date deposition_date2017-04-04
Structure title titleCrystal structure of human CUL3 N-terminal domain bound to KEAP1 BTB and 3-box
Keywords keywordsE3 ubiquitin ligase, ligase; LIGASE
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.

5nlb__assembly_1__model_1

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

Download this curve (.dat)

5nlb__assembly_1__model_1 | I(q)

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

5nlb__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)46.08 Å
Rg (electron density)46.74 Å
Total Rg46.73 Å
Atom count7764
Residues1004
Excluded volume137770 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 5nlb__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 (2)

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6. Fold Classification (SCOP + CATH) 4 domains

CATH v4.4 (4 domains)

Domain ID domain_id5nlbA01
Class class3 — Alpha Beta
Architecture architecture30 — 2-Layer Sandwich
Topology topology710 — Potassium Channel Kv1.1; Chain A
Homologous superfamily homologous superfamily10 — Potassium Channel Kv1.1; Chain A
Domain ID domain_id5nlbB01
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1310 — 5 helical Cullin repeat like
Homologous superfamily homologous superfamily10 — Cullin Repeats
Domain ID domain_id5nlbB02
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1310 — 5 helical Cullin repeat like
Homologous superfamily homologous superfamily10 — Cullin Repeats
Domain ID domain_id5nlbB03
Class class1 — Mainly Alpha
Architecture architecture20 — Up-down Bundle
Topology topology1310 — 5 helical Cullin repeat like
Homologous superfamily homologous superfamily10 — Cullin Repeats
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7. Citations (1)