2R73

Crystal Structure of the Possum Milk Whey Lipocalin Trichosurin at pH 8.2

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 Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d2r73a_	All beta proteins	Lipocalins	Lipocalins	automated matches	automated matches	silver-gray brushtail possum (Trichosurus vulpecula ) [TaxId: 9337 ],	SCOPe (2.08)
B	d2r73b_	All beta proteins	Lipocalins	Lipocalins	automated matches	automated matches	silver-gray brushtail possum (Trichosurus vulpecula ) [TaxId: 9337 ],	SCOPe (2.08)
C	d2r73c_	All beta proteins	Lipocalins	Lipocalins	automated matches	automated matches	silver-gray brushtail possum (Trichosurus vulpecula ) [TaxId: 9337 ],	SCOPe (2.08)
D	d2r73d_	All beta proteins	Lipocalins	Lipocalins	automated matches	automated matches	silver-gray brushtail possum (Trichosurus vulpecula ) [TaxId: 9337 ],	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	8070890	3001332	SCOP2B (2022-06-29)
B	SCOP2 Family	Retinol binding protein-like	8070889	4002493	SCOP2 (2022-06-29)
B	SCOP2 Superfamily	Lipocalins	8070890	3001332	SCOP2 (2022-06-29)
C	SCOP2B Superfamily	Lipocalins	8070890	3001332	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Lipocalins	8070890	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	e2r73A1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
B	Lipocalin	e2r73B1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
C	Lipocalin	e2r73C1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	ECOD (1.6)
D	Lipocalin	e2r73D1	A: beta barrels	X: Lipocalins/Streptavidin	H: Lipocalins (From Topology)	T: Lipocalins	F: Lipocalin	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)
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)

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	Trichosurin	binding small molecule binding	-	extracellular region cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR002971	Major urinary protein	Family
A, B, C, D	IPR012674	Calycin	Homologous Superfamily
A, B, C, D	IPR002345	Lipocalin	Family
A, B, C, D	IPR000566	Lipocalin/cytosolic fatty-acid binding domain	Domain

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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 R01GM133198.