1RPQ

High Affinity IgE Receptor (alpha chain) Complexed with Tight-Binding E131 'zeta' Peptide from Phage Display

External Resource: Annotation

Domain Annotation: SCOP/SCOPe Classification
Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
IMGT Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations

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

Chains	Domain Info	Class	Fold	Superfamily	Family	Domain	Species	Provenance Source (Version)
A	d1rpqa1	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	d1rpqb1	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)
C	d1rpqc1	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)
D	d1rpqd1	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)

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	8055592	3000071	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054823	3000071	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054823	3000071	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8055592	3000071	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054823	3000071	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8055592	3000071	SCOP2B (2022-06-29)
D	SCOP2B Superfamily	Immunoglobulin (Ig) domain-like	8054823	3000071	SCOP2B (2022-06-29)
D	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	e1rpqA2	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	e1rpqA1	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	I-set_4	e1rpqB2	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)
B	Ig_2_1	e1rpqB1	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)
C	I-set_4	e1rpqC2	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)
C	Ig_2_1	e1rpqC1	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)
D	I-set_4	e1rpqD2	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)
D	Ig_2_1	e1rpqD1	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)

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	2.60.40.10	Mainly Beta	Sandwich	Immunoglobulin-like	Immunoglobulins	CATH (4.3.0)
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, B, C, D	FCER1A	2C-LIKE	Homo sapiens (human)	FCER1A	C-LIKE-DOMAIN C-LIKE	RPI	2C-LIKE	IMGT (202507-0)

Protein Family Annotation Pfam Database Homepage

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

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A, B, C, D	High affinity immunoglobulin epsilon receptor alpha-subunit precursor	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	adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity response to stimulus immune response immune system process B cell mediated immunity leukocyte mediated immunity immunoglobulin mediated immune response adaptive immune response immune effector process cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway adaptive immune response based on somatic recombination of immune receptors built from immunoglobulin superfamily domains lymphocyte mediated immunity response to stimulus immune response immune system process B cell mediated immunity leukocyte mediated immunity immunoglobulin mediated immune response adaptive immune response immune effector process cellular response to stimulus regulation of biological process regulation of cellular process cell surface receptor signaling pathway 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 eosinophil activation involved in immune response secretion cell activation 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 type 2 immune response hypersensitivity defense response acute inflammatory response to antigenic stimulus type I hypersensitivity inflammatory response to antigenic stimulus response to stress inflammatory response acute inflammatory response	cell periphery cellular anatomical structure cell surface membrane plasma membrane external side of plasma membrane side of membrane
E [auth W], F [auth X], G [auth Y], H [auth Z]	Peptide E131	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, B, C, D	IPR036179	Immunoglobulin-like domain superfamily	Homologous Superfamily
A, B, C, D	IPR003598	Immunoglobulin subtype 2	Domain
A, B, C, D	IPR050488	Immunoglobulin Fc region receptor	Family
A, B, C, D	IPR013783	Immunoglobulin-like fold	Homologous Superfamily
A, B, C, D	IPR003599	Immunoglobulin domain subtype	Domain
A, B, C, D	IPR007110	Immunoglobulin-like domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, B, C, D	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

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.