Annotations: 9EI5

Cryo-EM structure of Apo form of prostaglandin D2 receptor (DP1)-bRIL-Fab complex

External Resource: Annotation

Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: MemProtMD

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
D [auth L]	WD40	e9ei5L1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)
B [auth H]	WD40	e9ei5H1	A: alpha arrays	X: HTH	H: HTH	T: Three-helical HTH	F: WD40	ECOD (v295)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth L]	Light Chain	IGKV1	Kappa	prostaglandin d2 receptor,soluble cytochrome b562	SAbDab (2026-06-26)
C [auth K]	Heavy Chain	IGHV1	-	-	SAbDab (2026-06-26)
B [auth H]	Heavy Chain	IGHV3	-	prostaglandin d2 receptor,soluble cytochrome b562	SAbDab (2026-06-26)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth L]	anti-BRIL Fab Light Chain	-	-	-
C [auth K]	anti-Fab Nanobody synthetic construct	-	-	-
B [auth H]	anti-BRIL Fab Heavy Chain	-	-	-
A	Prostaglandin D2 receptor,Soluble cytochrome b562	prostanoid receptor activity molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity icosanoid receptor activity prostaglandin D receptor activity prostaglandin receptor activity prostaglandin J receptor activity	positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality establishment of organelle localization multicellular organismal process regulated exocytosis cellular localization response to stimulus transport cell activation involved in immune response leukocyte degranulation myeloid leukocyte activation myeloid leukocyte mediated immunity vesicle-mediated transport positive regulation of cytosolic calcium ion concentration biological regulation regulation of biological quality establishment of organelle localization multicellular organismal process regulated exocytosis cellular localization response to stimulus transport cell activation involved in immune response leukocyte degranulation myeloid leukocyte activation myeloid leukocyte mediated immunity vesicle-mediated transport leukocyte activation localization secretion by cell organelle localization leukocyte activation involved in immune response establishment of localization in cell mast cell activation leukocyte mediated immunity mast cell mediated immunity immune response secretion cell activation vacuolar localization export from cell mast cell degranulation establishment of localization myeloid cell activation involved in immune response immune effector process mast cell activation involved in immune response exocytosis immune system process lysosome localization cellular process defense response response to stress inflammatory response cellular response to stimulus response to ketone response to prostaglandin response to lipid cellular response to prostaglandin D stimulus response to endogenous stimulus response to alcohol cellular response to prostaglandin stimulus response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to chemical stimulus cellular response to alcohol response to hormone response to prostaglandin D response to chemical cellular response to lipid cellular response to ketone cellular response to hormone stimulus regulation of biological process regulation of cellular process signaling G protein-coupled receptor signaling pathway signal transduction cell communication	cellular anatomical structure membrane cell periphery plasma membrane

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR008365	Prostanoid receptor	Family
A	IPR000376	Prostaglandin D receptor	Family
A	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
A	IPR017452	GPCR, rhodopsin-like, 7TM	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	: Q13258	asthma-related traits, susceptibility to, 1 asthma Dyslipidemia malignant colon neoplasm ovarian cancer lung cancer malignant ependymoma tuberculosis Crohn disease lung carcinoma osteosarcoma ulcerative colitis

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A	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.