Annotations: 3QBI

Crystal structure of an anion-free yellow form of pharaonis halorhodopsin

External Resource: Annotation

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

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d3qbia_	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]	d3qbid_	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	d3qbib_	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)
C [auth D]	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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A	TAL_FSA	e3qbiA1	A: beta barrels	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: TAL_FSA	ECOD (v294.2)
C [auth D]	TAL_FSA	e3qbiD1	A: beta barrels	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: TAL_FSA	ECOD (v294.2)
B	TAL_FSA	e3qbiB1	A: beta barrels	X: Lipocalins/Streptavidin	H: Zn-dependent exopeptidases	T: Zn-dependent exopeptidases	F: TAL_FSA	ECOD (v294.2)

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)
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)
B	1.20.1070.10	Mainly Alpha	Up-down Bundle	Rhopdopsin 7-helix transmembrane proteins	Rhodopsin 7-helix transmembrane proteins	CATH (4.3.0)

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 cellular anatomical structure plasma membrane membrane

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

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

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

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

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

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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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.