Annotations: 1F6A

Domain Annotation: SCOP/SCOPe Classification SCOP Database Homepage

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1f6aa1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	I set domains	IgE high affinity receptor alpha subunit	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1f6ab1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain epsilon constant domain 3, CH3-epsilon	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1f6ab2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain epsilon constant domain 4, CH4-epsilon	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
B	d1f6ab3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth D]	d1f6ad1	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain epsilon constant domain 3, CH3-epsilon	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth D]	d1f6ad2	All beta proteins	Immunoglobulin-like beta-sandwich	Immunoglobulin	C1 set domains (antibody constant domain-like)	Immunoglobulin heavy chain epsilon constant domain 4, CH4-epsilon	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)
C [auth D]	d1f6ad3	Artifacts	Tags	Tags	Tags	N-terminal Tags	human (Homo sapiens ) [TaxId: 9606 ],	SCOPe (2.08)

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054823	3000071	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8055592	3000071	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	I-set_4	e1f6aA2	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: I-set_4	ECOD (1.6)
A	Ig_2_1	e1f6aA1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: Ig_2_1	ECOD (1.6)
B	C1-set	e1f6aB1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set	ECOD (1.6)
C [auth D]	C1-set	e1f6aD1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: C1-set	ECOD (1.6)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
A	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
B	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
C [auth D]	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)

IMGT Antibody Annotation IMGT Database Homepage

Chain	Protein Name	Description	Organism Name	Gene Allele Name(s)	Domain Name(s)	Receptor Type	Receptor Description	Provenance Source
A	FCER1A	2C-LIKE	Homo sapiens (human)	FCER1A	C-LIKE-DOMAIN C-LIKE	RPI	2C-LIKE	IMGT (202414-0)
B, C [auth D]	Fc-epsilon (IGHE)	CH3-CH4	Homo sapiens (human)	IGHE01, IGHE02, IGHE*04	C-DOMAIN CH3, C-DOMAIN CH4	IG	FC-EPSILON	IMGT (202414-0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A	PF13927	Immunoglobulin domain (Ig_3)	Immunoglobulin domain	This family contains immunoglobulin-like domains.	Domain
A	PF13895	Immunoglobulin domain (Ig_2)	Immunoglobulin domain	This domain contains immunoglobulin-like domains.	Domain
B, C [auth D]	PF07654	Immunoglobulin C1-set domain (C1-set)	Immunoglobulin C1-set domain	-	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A	HIGH AFFINITY IMMUNOGLOBULIN EPSILON RECEPTOR ALPHA-SUBUNIT	high-affinity IgE receptor activity molecular transducer activity immunoglobulin receptor activity transmembrane signaling receptor activity signaling receptor activity immune receptor activity IgE receptor activity IgE binding protein-containing complex binding binding immunoglobulin binding	cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication multicellular organismal process regulated exocytosis cellular localization transport cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway response to stimulus signaling biological regulation cellular process signal transduction cell communication multicellular organismal process regulated exocytosis cellular localization transport eosinophil activation cell activation involved in immune response leukocyte degranulation myeloid leukocyte mediated immunity vesicle-mediated transport myeloid leukocyte activation leukocyte activation localization secretion by cell establishment of localization in cell leukocyte activation involved in immune response eosinophil degranulation leukocyte mediated immunity eosinophil activation involved in immune response secretion immune response cell activation export from cell establishment of localization myeloid cell activation involved in immune response immune effector process exocytosis immune system process eosinophil mediated immunity granulocyte activation establishment of organelle localization organelle localization mast cell activation mast cell mediated immunity vacuolar localization mast cell degranulation mast cell activation involved in immune response lysosome localization type 2 immune response adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity hypersensitivity defense response acute inflammatory response to antigenic stimulus type I hypersensitivity immunoglobulin mediated immune response adaptive immune response inflammatory response to antigenic stimulus response to stress B cell mediated immunity inflammatory response acute inflammatory response regulation of response to stimulus regulation of immune response regulation of immune system process	cell surface cellular anatomical entity cell periphery plasma membrane membrane
B, C [auth D]	IG EPSILON CHAIN C REGION	protein binding binding signaling receptor binding immunoglobulin receptor binding antigen binding	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity B cell antigen processing and presentation response to stimulus immune response adaptive immune response immune effector process antigen processing and presentation immune system process B cell mediated immunity leukocyte mediated immunity myeloid leukocyte mediated immunity inflammatory response to antigenic stimulus response to stress adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity B cell antigen processing and presentation response to stimulus immune response adaptive immune response immune effector process antigen processing and presentation immune system process B cell mediated immunity leukocyte mediated immunity myeloid leukocyte mediated immunity inflammatory response to antigenic stimulus response to stress antibody-dependent cellular cytotoxicity acute inflammatory response hypersensitivity defense response leukocyte mediated cytotoxicity acute inflammatory response to antigenic stimulus immunoglobulin mediated immune response type II hypersensitivity type IIa hypersensitivity cellular process inflammatory response cell killing cellular response to stimulus immune response-regulating cell surface receptor signaling pathway regulation of cellular process signaling positive regulation of biological process cell communication positive regulation of response to stimulus immune response-activating signaling pathway immune response-regulating signaling pathway positive regulation of immune response regulation of immune system process signal transduction positive regulation of immune system process regulation of biological process cell surface receptor signaling pathway immune response-activating cell surface receptor signaling pathway B cell receptor signaling pathway biological regulation regulation of response to stimulus regulation of immune response antigen receptor-mediated signaling pathway activation of immune response humoral immune response complement activation humoral immune response mediated by circulating immunoglobulin complement activation, classical pathway primary adaptive immune response biological process involved in interspecies interaction between organisms response to other organism antibacterial humoral response defense response to symbiont response to external stimulus antimicrobial humoral response response to biotic stimulus defense response to bacterium defense response to other organism response to bacterium response to external biotic stimulus multicellular organismal process cell population proliferation B cell activation cell activation B cell proliferation lymphocyte activation leukocyte proliferation leukocyte activation mononuclear cell proliferation lymphocyte proliferation regulated exocytosis cellular localization transport eosinophil activation cell activation involved in immune response leukocyte degranulation vesicle-mediated transport myeloid leukocyte activation localization secretion by cell establishment of localization in cell leukocyte activation involved in immune response eosinophil degranulation eosinophil activation involved in immune response secretion export from cell establishment of localization myeloid cell activation involved in immune response exocytosis eosinophil mediated immunity granulocyte activation establishment of organelle localization organelle localization mast cell activation mast cell mediated immunity vacuolar localization mast cell degranulation mast cell activation involved in immune response lysosome localization developmental process myeloid leukocyte differentiation cellular developmental process hemopoiesis macrophage differentiation cell development mononuclear cell differentiation myeloid cell differentiation cell differentiation anatomical structure development leukocyte differentiation type 2 immune response import into cell Fc receptor-mediated immune complex endocytosis receptor-mediated endocytosis endocytosis protein-containing complex localization adaptive immune memory response immunological memory process type I hypersensitivity macrophage activation	cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex IgE immunoglobulin complex immunoglobulin complex extracellular region extracellular space immunoglobulin complex, circulating plasma membrane protein complex membrane protein complex IgE B cell receptor complex receptor complex cell periphery plasma membrane membrane cellular anatomical entity protein-containing complex IgE immunoglobulin complex immunoglobulin complex extracellular region extracellular space immunoglobulin complex, circulating plasma membrane protein complex membrane protein complex IgE B cell receptor complex receptor complex B cell receptor complex plasma membrane signaling receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A	IPR003599	Immunoglobulin subtype	Domain
A	IPR003598	Immunoglobulin subtype 2	Domain
A	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A	IPR007110	Immunoglobulin-like domain	Domain
B, C [auth D]	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
B, C [auth D]	IPR003597	Immunoglobulin C1-set	Domain
B, C [auth D]	IPR003006	Immunoglobulin/major histocompatibility complex, conserved site	Conserved Site
B, C [auth D]	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
B, C [auth D]	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A	Pharos: P12319	urticaria Drug Eruptions drug allergy pilocytic astrocytoma acute myeloid leukemia chronic obstructive pulmonary disease head and neck cancer lung cancer ovarian cancer psoriasis atopic eczema cutaneous lupus erythematosus esophageal adenocarcinoma interstitial cystitis malignant pancreatic neoplasm urticaria Drug Eruptions drug allergy pilocytic astrocytoma acute myeloid leukemia chronic obstructive pulmonary disease head and neck cancer lung cancer ovarian cancer psoriasis atopic eczema cutaneous lupus erythematosus esophageal adenocarcinoma interstitial cystitis malignant pancreatic neoplasm non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma tuberculosis Barrett esophagus exocrine pancreatic carcinoma invasive ductal breast carcinoma MALT lymphoma osteosarcoma
B, C [auth D]	Pharos: P01854	asthma seasonal allergic rhinitis Chronic idiopathic urticaria psoriasis

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), 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.