3AKN

X-ray structure of iFABP from human and rat with bound fluorescent fatty acid analogue

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP/SCOPe Classification SCOP-e Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3akna_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Intestinal fatty acid binding protein	rat (Rattus norvegicus ) [TaxId: 10116 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Lipocalins	8042649	3001332	SCOP2B (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	Lipocalin_7	e3aknA1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin_7	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF00061	Lipocalin / cytosolic fatty-acid binding protein family (Lipocalin)	Lipocalin / cytosolic fatty-acid binding protein family	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid ...	Lipocalins are transporters for small hydrophobic molecules, such as lipids, steroid hormones, bilins, and retinoids. The family also encompasses the enzyme prostaglandin D synthase (EC:5.3.99.2). Alignment subsumes both the lipocalin and fatty acid binding protein signatures from PROSITE. This is supported on structural and functional grounds. The structure is an eight-stranded beta barrel.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	Fatty acid-binding protein, intestinal	fatty acid binding organic acid binding binding ion binding anion binding long-chain fatty acid binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding long-chain fatty acid transmembrane transporter activity lipid transporter activity lipid transmembrane transporter activity fatty acid transmembrane transporter activity fatty acid binding organic acid binding binding ion binding anion binding long-chain fatty acid binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding long-chain fatty acid transmembrane transporter activity lipid transporter activity lipid transmembrane transporter activity fatty acid transmembrane transporter activity transporter activity monocarboxylic acid transmembrane transporter activity carboxylic acid transmembrane transporter activity organic acid transmembrane transporter activity transmembrane transporter activity organic anion transmembrane transporter activity	fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process primary metabolic process metabolic process cellular process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process lipid metabolic process organic anion transport carboxylic acid transport transport lipid localization fatty acid metabolic process oxoacid metabolic process carboxylic acid metabolic process primary metabolic process metabolic process cellular process small molecule metabolic process monocarboxylic acid metabolic process organic acid metabolic process lipid metabolic process organic anion transport carboxylic acid transport transport lipid localization lipid transport establishment of localization organic acid transport localization monocarboxylic acid transport fatty acid transport macromolecule localization long-chain fatty acid transport multicellular organismal process system process digestion intestinal absorption digestive system process intestinal lipid absorption	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell projection actin-based cell projection microvillus plasma membrane bounded cell projection cell periphery cell cortex apical part of cell cell cortex region cytoplasmic region apical cortex cellular anatomical structure intracellular anatomical structure cytoplasm cytosol cell projection actin-based cell projection microvillus plasma membrane bounded cell projection cell periphery cell cortex apical part of cell cell cortex region cytoplasmic region apical cortex membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR000463	Cytosolic fatty-acid binding	Domain
A	IPR012674	Calycin	Homologous Superfamily
A	IPR031272	Fatty acid-binding protein, intestinal	Family
A	IPR031259	Intracellular lipid binding protein	Family
A	IPR000566	Lipocalin/cytosolic fatty-acid binding domain	Domain

RCSB PDB Core Operations are funded by the U.S. National Science Foundation (DBI-2321666), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM157729.