Annotations: 9L9O

Cryo-EM structure of apo GPR50 with BRIL fusion, anti-BRIL Fab, and anti-Fab Nb complex

External Resource: Annotation

SAbDab Antibody Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
C [auth B]	Heavy Chain	IGHV3	-	melatonin-related receptor,soluble cytochrome b562	SAbDab (2026-05-15)
B [auth C]	Light Chain	IGKV1	Kappa	melatonin-related receptor,soluble cytochrome b562	SAbDab (2026-05-15)
A [auth D]	Heavy Chain	IGHV1	-	-	SAbDab (2026-05-15)

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
D [auth A]	Melatonin-related receptor,Soluble cytochrome b562	molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity melatonin receptor activity binding tetrapyrrole binding heme binding electron transfer activity cation binding transition metal ion binding iron ion binding ion binding metal ion binding molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity melatonin receptor activity 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	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 cell-cell signaling electron transport chain metabolic process generation of precursor metabolites and energy	postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse postsynaptic specialization organelle synapse cell junction asymmetric synapse cell periphery plasma membrane membrane membrane-bounded organelle intracellular anatomical structure postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse postsynaptic specialization organelle synapse cell junction asymmetric synapse cell periphery plasma membrane membrane membrane-bounded organelle intracellular anatomical structure nucleus membrane-enclosed lumen intracellular membrane-bounded organelle intracellular organelle lumen intracellular organelle nucleoplasm organelle lumen nuclear lumen extracellular region periplasmic space
C [auth B]	anti-BRIL Fab Heavy Chain	-	-	-
B [auth C]	anti-BRIL Fab Light Chain	-	-	-
A [auth D]	anti-Fab Nb	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
D [auth A]	IPR000276	G protein-coupled receptor, rhodopsin-like	Family
D [auth A]	IPR002280	Melatonin-related receptor 1X	Family
D [auth A]	IPR000025	Melatonin receptor family	Family
D [auth A]	IPR017452	GPCR, rhodopsin-like, 7TM	Domain
D [auth A]	IPR010980	Cytochrome c/b562	Homologous Superfamily
D [auth A]	IPR009155	Cytochrome b562	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
D [auth A]	: Q13585	autism spectrum disorder diabetes mellitus psoriasis Autism Spectrum Disorders schizophrenia bipolar disorder pituitary cancer seasonal affective disorder

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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.

9L9O | pdb_00009l9o

Cryo-EM structure of apo GPR50 with BRIL fusion, anti-BRIL Fab, and anti-Fab Nb complex

External Resource: Annotation

SAbDab Antibody Annotation SAbDab Database Homepage

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

InterPro: Protein Family Classification InterPro Database Homepage

Pharos: Disease Associations Pharos Homepage Annotation