Annotations: 8IHK

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
A [auth R]	PF00001	e8ihkR1	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: PF00001	ECOD (1.6)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth R]	Soluble cytochrome b562,Hydroxycarboxylic acid receptor 3	binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity binding organic cyclic compound binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding small molecule binding molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity nicotinic acid receptor activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation G protein-coupled receptor signaling pathway cellular process signal transduction cell communication	periplasmic space cellular anatomical entity cell junction cell periphery plasma membrane membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth R]	IPR010980	Cytochrome c/b562	Homologous Superfamily
A [auth R]	IPR009155	Cytochrome b562	Family
A [auth R]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
A [auth R]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth R]	Pharos: P49019	squamous cell carcinoma skin neoplasm skin cancer bipolar disorder lung carcinoma psoriasis breast carcinoma MALT lymphoma schizophrenia lung adenocarcinoma metabolic syndrome X

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A [auth R]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A [auth R]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth R]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	G Protein-Coupled Receptors: Class A	HCA3 hydroxycarboxylic acid receptor 3 (GPR109B, niacin receptor) - G_i complex with bound acifran

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 R01GM133198.