1OPB

THE CRYSTAL STRUCTURES OF HOLO-AND APO-CELLULAR RETINOL BINDING PROTEIN II

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)
B	d1opbb_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Cellular retinol-binding protein II (CRBP)	black rat (Rattus rattus ) [TaxId: 10117 ],	SCOPe (2.08)
C	d1opbc_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Cellular retinol-binding protein II (CRBP)	black rat (Rattus rattus ) [TaxId: 10117 ],	SCOPe (2.08)
D	d1opbd_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Cellular retinol-binding protein II (CRBP)	black rat (Rattus rattus ) [TaxId: 10117 ],	SCOPe (2.08)
A	d1opba_	All beta proteins	Lipocalins	Lipocalins	Fatty acid binding protein-like	Cellular retinol-binding protein II (CRBP)	black rat (Rattus rattus ) [TaxId: 10117 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
B	SCOP2B Superfamily	Lipocalins	8042671	3001332	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Lipocalins	8042671	3001332	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Lipocalins	8042671	3001332	SCOP2B (2022-06-29)
A	SCOP2 Family	Fatty acid binding protein-like	8030292	4002547	SCOP2 (2022-06-29)
A	SCOP2 Superfamily	Lipocalins	8042671	3001332	SCOP2 (2022-06-29)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
B	Lipocalin_7	e1opbB1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin_7	ECOD (1.6)
C	Lipocalin_7	e1opbC1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin_7	ECOD (1.6)
D	Lipocalin_7	e1opbD1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin_7	ECOD (1.6)
A	Lipocalin_7	e1opbA1	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)
B	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
C	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
D	2.40.128.20	Mainly Beta	Beta Barrel	Lipocalin	Calycin beta-barrel core domain	CATH (4.3.0)
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, B, C, D	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, B, C, D	CELLULAR RETINOL BINDING PROTEIN II	fatty acid binding organic acid binding binding ion binding anion binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding vitamin binding alcohol binding isoprenoid binding retinoid binding retinol binding fatty acid binding organic acid binding binding ion binding anion binding lipid binding carboxylic acid binding monocarboxylic acid binding small molecule binding vitamin binding alcohol binding isoprenoid binding retinoid binding retinol binding retinal binding	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 diterpenoid metabolic process regulation of hormone levels organic hydroxy compound 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 diterpenoid metabolic process regulation of hormone levels organic hydroxy compound metabolic process biological regulation primary metabolic process alcohol metabolic process hormone metabolic process retinoid metabolic process olefinic compound metabolic process metabolic process cellular process small molecule metabolic process regulation of biological quality retinol metabolic process terpenoid metabolic process isoprenoid metabolic process lipid metabolic process primary alcohol metabolic process	cellular anatomical structure intracellular anatomical structure cytoplasm cytosol membrane-bounded organelle intracellular organelle organelle nucleus intracellular membrane-bounded organelle

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR012674	Calycin	Homologous Superfamily
A, B, C, D	IPR000463	Cytosolic fatty-acid binding	Domain
A, B, C, D	IPR031259	Intracellular lipid binding protein	Family
A, B, C, D	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.