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1a57

THE THREE-DIMENSIONAL STRUCTURE OF A HELIX-LESS VARIANT OF INTESTINAL FATTY ACID BINDING PROTEIN, NMR, 20 STRUCTURES

Method: SOLUTION NMR Dmax: 55.8 Å Quality: GOOD
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1. Protein Identity and Related Structures Protein Identity & Related Structures

INTESTINAL FATTY ACID-BINDING PROTEIN

Rattus norvegicus

UniProt P02693

State in the Current Structure

Assembly Oligomeric State Construct Mutations and Modifications Ligands, Ions and Associated Components Method and Experimental Conditions Structure Quality
1 Protein monomer Monomer Protein × 1 PDB declaration: monomeric（1） Consistent with protein copy count Chain A； UniProt 1–131 Not recorded No other associated polymer SOLUTION NMR NMR measurement conditions：pH 7.2；298 K Resolution not provided

Other States of the Same Protein in the Database

Each row is a biological assembly of the same UniProt protein in another PDB entry. The “Difference from current entry” column identifies evidence-level differences; no tag means the currently parsed fields agree.

Other PDB Difference from Current Entry 1A57 Assembly / Oligomeric State Construct Mutations and Modifications Ligands, Ions and Non-polymers Method and Experimental Conditions Structure Quality
1AEL NMR STRUCTURE OF APO INTESTINAL FATTY ACID-BINDING PROTEIN, 20 STRUCTURES Deposited 1996-07-30 Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.2；306 K
Resolution not provided
1DC9 PROPERTIES AND CRYSTAL STRUCTURE OF A BETA-BARREL FOLDING MUTANT, V60N INTESTINAL FATTY ACID BINDING PROTEIN (IFABP) Deposited 1999-11-04 Different mutation/modification Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Mutation：V60N No recorded non-water small molecule X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7.3；36-38% PEG 4000, 0.1 M PIPES, 1:1 RATIO WELL AND 4.6 MG/ML PROTEIN IN WATER, pH 7.3, VAPOR DIFFUSION, HANGING DROP
Resolution 2.10 Å R-free 0.228
1ICM ESCHERICHIA COLI-DERIVED RAT INTESTINAL FATTY ACID BINDING PROTEIN WITH BOUND MYRISTATE AT 1.5 A RESOLUTION AND I-FABPARG106-->GLN WITH BOUND OLEATE AT 1.74 A RESOLUTION Deposited 1993-09-20 Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded MYR MYRISTIC ACID × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.50 Å
1ICN ESCHERICHIA COLI-DERIVED RAT INTESTINAL FATTY ACID BINDING PROTEIN WITH BOUND MYRISTATE AT 1.5 A RESOLUTION AND I-FABPARG106-->GLN WITH BOUND OLEATE AT 1.74 A RESOLUTION Deposited 1993-09-20 Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded OLA OLEIC ACID × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.74 Å
1IFB REFINED APOPROTEIN STRUCTURE OF RAT INTESTINAL FATTY ACID BINDING PROTEIN PRODUCED IN ESCHERICHIA COLI Deposited 1990-12-05 Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.96 Å
1IFC REFINEMENT OF THE STRUCTURE OF RECOMBINANT RAT INTESTINAL FATTY ACID-BINDING APOPROTEIN AT 1.2 ANGSTROMS RESOLUTION Deposited 1991-12-19 Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded No recorded non-water small molecule X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 1.19 Å
1SA8 THE NMR STRUCTURE OF A STABLE AND COMPACT ALL-beta-SHEET VARIANT OF INTESTINAL FATTY ACID-BINDING PROTEIN Deposited 2004-02-07 Different construct Different mutation/modification Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–8（8 aa） Fragment：D27-GG
Chain A 36–131（96 aa） Fragment：D27-GG
Not recorded No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.2；298 K；Ionic strength (raw mmCIF value) 20 mM potassium phosphate, 135 mM KCl, 10 mM NaCl, 0.5% NaN3；Pressure atmospheric
NMR sample composition 1.8 mM protein, 20 mM potassium phosphate, 135 mM KCl, 10 mM NaCl, 0.5% NaN3,95% H2O, 5% D2O | 95% H2O/5% D2O
Resolution not provided
1T8V The NMR structure of d34a i-fabp: implications for the determinants of ligand binding stoichiometry Deposited 2004-05-13 Different mutation/modification Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Mutation：D34A No recorded non-water small molecule SOLUTION NMR
NMR measurement conditions pH 7.2；298 K；Ionic strength (raw mmCIF value) 50mM KCl
NMR sample composition 20 mM potassium phosphate, 50 mM KCl, 0.5% NaN3, 95% H2O, 5% D2O | 95% H2O/5% D2O
Resolution not provided
1URE NMR STRUCTURE OF INTESTINAL FATTY ACID-BINDING PROTEIN COMPLEXED WITH PALMITATE, 20 STRUCTURES Deposited 1996-06-17 Different ligand/ion Different experimental conditions Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded PLM PALMITIC ACID × 1 SOLUTION NMR
NMR measurement conditions pH 7.2；310 K
Resolution not provided
2IFB CRYSTAL STRUCTURE OF RAT INTESTINAL FATTY-ACID-BINDING PROTEIN. REFINEMENT AND ANALYSIS OF THE ESCHERICHIA COLI-DRIVED PROTEIN WITH BOUND PALMITATE Deposited 1990-12-05 Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 1–131（131 aa）
Not recorded PLM PALMITIC ACID × 1 X-RAY DIFFRACTION mmCIF provides none of the parsed conditions Resolution 2.00 Å
3AKN X-ray structure of iFABP from human and rat with bound fluorescent fatty acid analogue Deposited 2010-07-14 Different construct Different ligand/ion Different experimental method Different experimental conditions Different structure-quality metrics Assembly 1 Protein monomer Monomer；Protein × 1 PDB declaration: monomeric
Chain A 2–132（131 aa）
Not recorded 11D 11-({[5-(dimethylamino)naphthalen-1-yl]sulfonyl}amino)undecanoic acid × 1 X-RAY DIFFRACTION
X-ray crystallization conditions VAPOR DIFFUSION, HANGING DROP；pH 7；277 K；30-45% w/v PEG 2000, 0.1M Tris pH 7.0, 0.2M magnesium chloride, VAPOR DIFFUSION, HANGING DROP, temperature 277K
Resolution 1.60 Å R-free 0.257

11 other PDB entries and 11 assemblies. Open the comparison page and filter oligomeric states

View Construct and Data Evidence
UniProt name FABPI_RAT
Isoform —
PDB entities 1
Chains and sequence ranges Author chain A； PDBConstruct 1–116； UniProt 1–131

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.

SAXS scattering curve SAXS Profile

SAXS profile for 1a57

P(r) Distance Distribution P(r) Distribution

P(r) distribution for 1a57
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2. Structure Basics 2. Structure Basics

Entry ID entry_id1a57
Deposition date deposition_date1998-02-20
Structure title titleTHE THREE-DIMENSIONAL STRUCTURE OF A HELIX-LESS VARIANT OF INTESTINAL FATTY ACID BINDING PROTEIN, NMR, 20 STRUCTURES
Keywords keywordsFATTY ACID-BINDING, LIPID TRANSPORT, BETA-CLAM, LIPOCALINS; FATTY ACID-BINDING
Experimental Method methodSOLUTION NMR
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3. SAXS Parameters (CRYSOL theoretical calculation) 3. SAXS Parameters (CRYSOL)

Radius of gyration Rg (Guinier) rg_guinier14.89 Å
Radius of gyration Rg (electron density) rg_electron14.19 Å
Forward intensity I(0) i0965143000.00
Molecular weight molecular_weight262890.0 kDa
Excluded volume excluded_volume328460 ų
Envelope volume envelope_volume32802 ų
Hydration-shell volume shell_volume16528 ų
Envelope diameter envelope_diameter52.6 Å
Shell Rg shell_rg22.83 Å
Envelope Rg envelope_rg17.13 Å
Shape Rg shape_rg14.18 Å
Total Rg total_rg14.38 Å
Total atoms total_atoms36760
Residues n_residues2320
Spherical-harmonic order n_harmonics20
q range q_range— – 0.5000 Å−1
Data points n_points101
Shell type shell_typedirectional
Solvent electron density solvent_density0.3340 e/ų
Shell contrast contrast_shell0.0300 e/ų
CRYSOL version crysol_version4.1.3
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4. P(r) Distance Distribution (GNOM inversion) 4. P(r) Analysis (GNOM)

Maximum dimension Dmax dmax55.8 Å
Rg (real space) rg_real14.80 Å
Rg uncertainty (real space) rg_real_error0.39 Å
I(0) (real space) i0_real9.6510e+08
I(0) uncertainty (real space) i0_real_error1.2120e+07
Rg (reciprocal space) rg_reciprocal14.81 Å
I(0) (reciprocal space) i0_reciprocal965100000.0000
Solution quality estimate total_estimate0.8197
Solution quality rating solution_quality GOOD a GOOD solution
P(r) peaks n_peaks2
Primary peak position r_peak_primary19.1 Å
Skewness Skewness skewness0.106
Kurtosis Kurtosis kurtosis-0.385
Angular range angular_range— – 0.5000 Å−1
Current regularization parameter α current_alpha0.0001
Highest regularization parameter α highest_alpha282600.0000
Real-space data points n_real_points80
GNOM version gnom_version4.1.3
Quality Criteria quality_criteria AN1: 0.000; Oscil: 0.565; Stabil: 1.000; Sysdev: 1.000; Positv: 1.000; Valcen: 0.958; Smooth: 1.000
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5. Crystallography and Experiment 5. Crystallography & Experiment

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6. Entities and Polymers Entities & Polymers (1)

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7. Fold Classification (SCOP + CATH) 2 domains

SCOP 2.08 (1 domains)

Domain ID domain_idd1a57a_
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 (1 domains)

Domain ID domain_id1a57A00
Class class2 — Mainly Beta
Architecture architecture40 — Beta Barrel
Topology topology128 — Lipocalin
Homologous superfamily homologous superfamily20 — Calycin beta-barrel core domain
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8. Citations (5)

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9. Files and Curves (10)