Annotations: 5SY1

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A [auth C]	SCOP2 Family	Calmodulin-like	8096507	4000924	SCOP2 (2022-06-29)
A [auth C]	SCOP2 Superfamily	EF-hand	8096508	3001983	SCOP2 (2022-06-29)
D	SCOP2B Superfamily	EF-hand	8096508	3001983	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 [auth C]	EF-hand_7_8	e5sy1C2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
A [auth C]	EF-hand_7_5	e5sy1C1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
D	EF-hand_7_8	e5sy1D2	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_8	ECOD (1.6)
D	EF-hand_7_5	e5sy1D1	A: alpha arrays	X: EF-hand	H: EF-hand-related	T: EF-hand	F: EF-hand_7_5	ECOD (1.6)
B [auth A]	RBP_receptor	e5sy1A1	A: alpha complex topology	X: Retinol uptake receptor STRA6 (From Topology)	H: Retinol uptake receptor STRA6 (From Topology)	T: Retinol uptake receptor STRA6	F: RBP_receptor	ECOD (1.6)
C [auth B]	RBP_receptor	e5sy1B1	A: alpha complex topology	X: Retinol uptake receptor STRA6 (From Topology)	H: Retinol uptake receptor STRA6 (From Topology)	T: Retinol uptake receptor STRA6	F: RBP_receptor	ECOD (1.6)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], D	PF13499	EF-hand domain pair (EF-hand_7)	EF-hand domain pair	-	Domain
B [auth A], C [auth B]	PF14752	Retinol binding protein receptor (RBP_receptor)	Retinol binding protein receptor	-	Family

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C], D	Calmodulin	cation binding ion binding binding calcium ion binding metal ion binding small molecule binding	-	-
B [auth A], C [auth B]	STRA6	protein binding binding calmodulin binding vitamin binding alcohol binding isoprenoid binding retinoid binding lipid binding retinol binding small molecule binding molecular adaptor activity molecular transducer activity signaling receptor activity retinal binding protein binding binding calmodulin binding vitamin binding alcohol binding isoprenoid binding retinoid binding lipid binding retinol binding small molecule binding molecular adaptor activity molecular transducer activity signaling receptor activity retinal binding alcohol transmembrane transporter activity retinol transmembrane transporter activity lipid transporter activity lipid transmembrane transporter activity organic hydroxy compound transmembrane transporter activity vitamin transmembrane transporter activity transporter activity transmembrane transporter activity identical protein binding	transport organic substance transport lipid localization lipid transport organic hydroxy compound transport establishment of localization terpenoid transport localization macromolecule localization isoprenoid transport retinol transport developmental process multicellular organism development multicellular organismal process transport organic substance transport lipid localization lipid transport organic hydroxy compound transport establishment of localization terpenoid transport localization macromolecule localization isoprenoid transport retinol transport developmental process multicellular organism development multicellular organismal process embryo development ending in birth or egg hatching chordate embryonic development anatomical structure development embryo development import into cell vitamin transport vitamin A transport vitamin A import into cell transmembrane transport lipid import into cell cellular process vitamin transmembrane transport	cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C], D	IPR018247	EF-Hand 1, calcium-binding site	Binding Site
A [auth C], D	IPR002048	EF-hand domain	Domain
A [auth C], D	IPR011992	EF-hand domain pair	Homologous Superfamily
B [auth A], C [auth B]	IPR026612	Receptor for retinol uptake STRA6-like	Family

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
B [auth A], C [auth B]	OPM				Vitamin A receptor/transporter

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
B [auth A], C [auth B]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
B [auth A], C [auth B]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
B [auth A], C [auth B]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	Novel Receptors	STRA6 retinol-uptake receptor in complex with calmodulin (CaM)

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.