Annotations: 3QBK

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3qbka_	Membrane and cell surface proteins and peptides	Class A G protein-coupled receptor (GPCR)-like	Class A G protein-coupled receptor (GPCR)-like	automated matches	automated matches	(Natronomonas pharaonis ) [TaxId: 2257 ],	SCOPe (2.08)
B	d3qbkb_	Membrane and cell surface proteins and peptides	Class A G protein-coupled receptor (GPCR)-like	Class A G protein-coupled receptor (GPCR)-like	automated matches	automated matches	(Natronomonas pharaonis ) [TaxId: 2257 ],	SCOPe (2.08)
C [auth D]	d3qbkd_	Membrane and cell surface proteins and peptides	Class A G protein-coupled receptor (GPCR)-like	Class A G protein-coupled receptor (GPCR)-like	automated matches	automated matches	(Natronomonas pharaonis ) [TaxId: 2257 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	G protein-coupled receptor-like	8071318	3000473	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	G protein-coupled receptor-like	8071318	3000473	SCOP2B (2022-06-29)
C [auth D]	SCOP2B Superfamily	G protein-coupled receptor-like	8071318	3000473	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	Bac_rhodopsin	e3qbkA1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: Bac_rhodopsin	ECOD (1.6)
B	Bac_rhodopsin	e3qbkB1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: Bac_rhodopsin	ECOD (1.6)
C [auth D]	Bac_rhodopsin	e3qbkD1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: Bac_rhodopsin	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	1.20.1070.10	Mainly Alpha	Up-down Bundle	Rhopdopsin 7-helix transmembrane proteins	Rhodopsin 7-helix transmembrane proteins	CATH (4.3.0)
B	1.20.1070.10	Mainly Alpha	Up-down Bundle	Rhopdopsin 7-helix transmembrane proteins	Rhodopsin 7-helix transmembrane proteins	CATH (4.3.0)
C [auth D]	1.20.1070.10	Mainly Alpha	Up-down Bundle	Rhopdopsin 7-helix transmembrane proteins	Rhodopsin 7-helix transmembrane proteins	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, B, C [auth D]	PF01036	Bacteriorhodopsin-like protein (Bac_rhodopsin)	Bacteriorhodopsin-like protein	The bacterial opsins are retinal-binding proteins that provide light- dependent ion transport and sensory functions to a family of halophilic bacteria [2,3]. They are integral membrane proteins believed to contain seven transmembrane (TM) domains, th ...	The bacterial opsins are retinal-binding proteins that provide light- dependent ion transport and sensory functions to a family of halophilic bacteria [2,3]. They are integral membrane proteins believed to contain seven transmembrane (TM) domains, the last of which contains the attachment point for retinal (a conserved lysine). This family also includes distantly related proteins that do not contain the retinal binding lysine and so cannot function as opsins. Some fungal examples are: Swiss:O74870, Swiss:P25619, Swiss:P38079, Swiss:Q12117.	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C [auth D]	Halorhodopsin	passive transmembrane transporter activity monoatomic ion channel activity channel activity monoatomic ion transmembrane transporter activity transporter activity transmembrane transporter activity molecular transducer activity photoreceptor activity signaling receptor activity	phototransduction cellular response to stimulus detection of light stimulus response to light stimulus detection of external stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation response to external stimulus detection of abiotic stimulus cell communication detection of stimulus phototransduction cellular response to stimulus detection of light stimulus response to light stimulus detection of external stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation response to external stimulus detection of abiotic stimulus cell communication detection of stimulus cellular process response to abiotic stimulus response to radiation signal transduction	cell periphery plasma membrane membrane cellular anatomical entity

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C [auth D]	IPR018229	Rhodopsin, retinal binding site	Binding Site
A, B, C [auth D]	IPR001425	Archaeal/bacterial/fungal rhodopsins	Family

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.