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1tw4

Crystal Structure of Chicken Liver Basic Fatty Acid Binding Protein (Bile Acid Binding Protein) Complexed With Cholic Acid

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

Fatty acid-binding protein

OrganismNot specified

UniProt P80226

State in the Current Structure

Assembly Physical composition Protein state Molecular copy count Associated components Data consistency
1 Protein monomer Monomer Protein 1 CHOLIC ACID × 2 water × 1 Consistent with protein count
2 Protein monomer Monomer Protein 1 CHOLIC ACID × 2 water × 1 Consistent with protein count

Other States of the Same Protein in the Database

Monomer
1mvg 1tvq 1tw4 1tw4 1zry 2jn3 2k62 2lfo 7o0j 7o0k 7o0k 9etc

18 assemblies; showing the first 12

Homodimer
9ete 9etf

2 assemblies

Homotetramer

None

Other homooligomers

None

Heteromeric or nucleic-acid complex

None

View Construct and Data Evidence
UniProt name FABPL_CHICK
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–125； UniProt 1–125 Author chain B； PDBConstruct 1–125； UniProt 1–125

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_id1tw4
Deposition date deposition_date2004-06-30
Structure title titleCrystal Structure of Chicken Liver Basic Fatty Acid Binding Protein (Bile Acid Binding Protein) Complexed With Cholic Acid
Keywords keywordsLb-FABP, FABP, BABP, INTRACELLULAR BILE ACID-BINDING PROTEIN, CHOLIC ACID, BILE ACID, LIPID BINDING PROTEIN; LIPID BINDING PROTEIN
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.

1tw4__assembly_2__model_1

Assembly 2 · Model 1 · CRYSOL 4.1.3-1-20251215 (887e7ef)

Download this curve (.dat)

1tw4__assembly_2__model_1 | I(q)

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

1tw4__assembly_2__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）15.38 Å
Rg (electron density)13.85 Å
Total Rg15.17 Å
Atom count1047
Residues125
Excluded volume19046 ų
Maximum q0.500 Å⁻¹
Assembly Model Structure unit Oligomeric description Status CRYSOL Actions
1 1 1tw4__assembly_1__model_1 monomeric （1） Success 4.1.3-1-20251215 (887e7ef) View Download
2 1 1tw4__assembly_2__model_1 monomeric （1） 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

SCOP 2.08 (2 domains)

Domain ID domain_idd1tw4a_
Class classb — All beta proteins
Fold Fold foldb.60 — Lipocalins
Superfamily Superfamily superfamilyb.60.1 — Lipocalins
Family Family familyb.60.1.2 — Fatty acid binding protein-like
Domain ID domain_idd1tw4b_
Class classb — All beta proteins
Fold Fold foldb.60 — Lipocalins
Superfamily Superfamily superfamilyb.60.1 — Lipocalins
Family Family familyb.60.1.2 — Fatty acid binding protein-like

CATH v4.4 (2 domains)

Domain ID domain_id1tw4A00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily20 — Calycin beta-barrel core domain
Domain ID domain_id1tw4B00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily20 — Calycin beta-barrel core domain
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7. Citations (3)