Annotations: 7E6U

the complex of inactive CaSR and NB2D11

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
SAbDab Antibody Annotation
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification
Pharos: Disease Associations
Membrane Protein Annotation: OPM
Membrane Protein Annotation: PDBTM
Membrane Protein Annotation: MemProtMD
Membrane Protein Annotation: mpstruc

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C	SCOP2B Superfamily	TNF receptor-like	8091102	3000971	SCOP2B (2022-06-29)
C	SCOP2B Superfamily	Type 1 solute binding protein-like	8078809	3000125	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	TNF receptor-like	8091102	3000971	SCOP2B (2022-06-29)
A	SCOP2B Superfamily	Type 1 solute binding protein-like	8078809	3000125	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)
D [auth B]	HATPase_c	e7e6uB1	A: beta barrels	X: CNF1/YfiH-like putative cysteine hydrolases	H: RIFT-related	T: FMN-binding split barrel 2	F: HATPase_c	ECOD (v294.2)
B [auth D]	HATPase_c	e7e6uD1	A: beta barrels	X: CNF1/YfiH-like putative cysteine hydrolases	H: RIFT-related	T: FMN-binding split barrel 2	F: HATPase_c	ECOD (v294.2)
C		e7e6uC1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)
A		e7e6uA1	A: beta barrels	X: Nuclear receptor ligand-binding domain	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F:	ECOD (v294.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth D], D [auth B]	Heavy Chain	IGHV1	-	extracellular calcium-sensing receptor	SAbDab (2026-05-08)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A, C	PF01094	Receptor family ligand binding region (ANF_receptor)	Receptor family ligand binding region	This family includes extracellular ligand binding domains of a wide range of receptors. This family also includes the bacterial amino acid binding proteins of known structure.	Domain
A, C	PF07562	Nine Cysteines Domain of family 3 GPCR (NCD3G)	Nine Cysteines Domain of family 3 GPCR	-	Family
A, C	PF00003	7 transmembrane sweet-taste receptor of 3 GCPR (7tm_3)	7 transmembrane sweet-taste receptor of 3 GCPR	This is a domain of seven transmembrane regions that forms the C-terminus of some subclass 3 G-coupled-protein receptors. It is often associated with a downstream cysteine-rich linker domain, NCD3G Pfam:PF07562, which is the human sweet-taste recepto ...	This is a domain of seven transmembrane regions that forms the C-terminus of some subclass 3 G-coupled-protein receptors. It is often associated with a downstream cysteine-rich linker domain, NCD3G Pfam:PF07562, which is the human sweet-taste receptor, and the N-terminal domain, ANF_receptor Pfam:PF01094. The seven TM regions assemble in such a way as to produce a docking pocket into which such molecules as cyclamate and lactisole have been found to bind and consequently confer the taste of sweetness [1].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
B [auth D], D [auth B]	NB-2D11	-	-	-
A, C	Extracellular calcium-sensing receptor	binding amino acid binding identical protein binding protein binding cation binding ion binding calcium ion binding metal ion binding small molecule binding molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity transmembrane transporter binding binding amino acid binding identical protein binding protein binding cation binding ion binding calcium ion binding metal ion binding small molecule binding molecular transducer activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity transmembrane transporter binding cell adhesion molecule binding protein-containing complex binding integrin binding signaling receptor binding protein homodimerization activity protein dimerization activity kinase binding enzyme binding protein kinase binding	biological regulation regulation of biological quality regulation of presynaptic membrane potential regulation of membrane potential regulation of calcium ion transport regulation of localization regulation of biological process transport regulation of transport regulation of monoatomic ion transport establishment of localization metal ion transport calcium ion transport localization biological regulation regulation of biological quality regulation of presynaptic membrane potential regulation of membrane potential regulation of calcium ion transport regulation of localization regulation of biological process transport regulation of transport regulation of monoatomic ion transport establishment of localization metal ion transport calcium ion transport localization monoatomic ion transport regulation of metal ion transport monoatomic cation transport developmental process multicellular organismal process epithelium development tube development branching morphogenesis of an epithelial tube morphogenesis of an epithelium tissue development tissue morphogenesis anatomical structure morphogenesis multicellular organism development tube morphogenesis morphogenesis of a branching structure anatomical structure development epithelial tube morphogenesis morphogenesis of a branching epithelium regulation of tube diameter system process regulation of tube size regulation of system process positive regulation of biological process positive regulation of vasoconstriction circulatory system process regulation of blood circulation vascular process in circulatory system regulation of vasoconstriction positive regulation of multicellular organismal process regulation of multicellular organismal process blood vessel diameter maintenance vasoconstriction blood circulation regulation of anatomical structure size monoatomic ion transmembrane transport chloride transport transmembrane transport chloride transmembrane transport monoatomic anion transport monoatomic anion transmembrane transport cellular process inorganic anion transport regulation of biosynthetic process regulation of cellular process regulation of macromolecule metabolic process gene expression macromolecule biosynthetic process positive regulation of macromolecule biosynthetic process regulation of gene expression positive regulation of metabolic process biosynthetic process positive regulation of gene expression positive regulation of biosynthetic process regulation of macromolecule biosynthetic process metabolic process positive regulation of macromolecule metabolic process macromolecule metabolic process regulation of metabolic process positive regulation of cellular process response to stimulus response to stress response to ischemia response to decreased oxygen levels cellular response to stimulus cellular response to oxygen levels cellular response to hypoxia cellular response to decreased oxygen levels cellular response to chemical stimulus cellular response to stress response to hypoxia response to chemical response to oxygen levels response to abiotic stimulus inorganic ion homeostasis intracellular calcium ion homeostasis homeostatic process calcium ion homeostasis cellular homeostasis chemical homeostasis intracellular monoatomic cation homeostasis monoatomic ion homeostasis intracellular chemical homeostasis monoatomic cation homeostasis intracellular monoatomic ion homeostasis organic acid transport bile acid secretion organic anion transport monocarboxylic acid transport carboxylic acid transport secretion acid secretion response to peptide cellular response to peptide behavior chemosensory behavior signaling intracellular signal transduction cell communication JNK cascade intracellular signaling cassette MAPK cascade signal transduction cellular response to low-density lipoprotein particle stimulus response to endogenous stimulus response to lipoprotein particle cellular response to lipoprotein particle stimulus phospholipase C-activating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway regulation of calcium ion import positive regulation of calcium ion transport positive regulation of calcium ion import positive regulation of transport positive regulation of monoatomic ion transport calcium ion import ossification connective tissue development adipose tissue development fat pad development animal organ development response to fibroblast growth factor response to growth factor positive regulation of cell communication positive regulation of signal transduction regulation of signal transduction positive regulation of response to stimulus positive regulation of ERK1 and ERK2 cascade regulation of intracellular signal transduction regulation of signaling positive regulation of MAPK cascade positive regulation of intracellular signal transduction regulation of MAPK cascade regulation of response to stimulus regulation of cell communication ERK1 and ERK2 cascade regulation of ERK1 and ERK2 cascade positive regulation of signaling response to oxygen-containing compound cellular response to glucose stimulus intracellular glucose homeostasis cellular response to oxygen-containing compound response to hexose cellular response to carbohydrate stimulus response to monosaccharide response to carbohydrate response to glucose glucose homeostasis carbohydrate homeostasis cellular response to hexose stimulus cellular response to monosaccharide stimulus response to nutrient levels response to lipid response to nutrient response to vitamin cellular response to vitamin D cellular response to nutrient levels response to vitamin D cellular response to vitamin cellular response to lipid cellular response to nutrient cell population proliferation positive regulation of cell population proliferation regulation of cell population proliferation vasodilation positive chemotaxis chemotaxis positive regulation of locomotion regulation of response to external stimulus positive regulation of positive chemotaxis response to external stimulus regulation of chemotaxis positive regulation of chemotaxis regulation of positive chemotaxis positive regulation of response to external stimulus taxis regulation of locomotion locomotion positive regulation of response to biotic stimulus pattern recognition receptor signaling pathway regulation of NLRP3 inflammasome complex assembly positive regulation of NLRP3 inflammasome complex assembly response to biotic stimulus cellular component biogenesis immune response-activating signaling pathway cellular component assembly inflammasome-mediated signaling pathway positive regulation of immune response canonical inflammasome complex assembly regulation of immune system process positive regulation of immune system process innate immune response-activating signaling pathway positive regulation of pattern recognition receptor signaling pathway immune response response to other organism regulation of innate immune response positive regulation of inflammasome-mediated signaling pathway regulation of inflammasome-mediated signaling pathway defense response to other organism regulation of pattern recognition receptor signaling pathway NLRP3 inflammasome complex assembly positive regulation of defense response activation of innate immune response regulation of immune response inflammatory response activation of immune response cytoplasmic pattern recognition receptor signaling pathway regulation of defense response regulation of response to biotic stimulus biological process involved in interspecies interaction between organisms regulation of cellular component organization positive regulation of cellular component organization intracellular receptor signaling pathway regulation of cytoplasmic pattern recognition receptor signaling pathway cellular component organization regulation of protein-containing complex assembly positive regulation of protein-containing complex assembly immune response-regulating signaling pathway regulation of response to stress innate immune response protein-containing complex assembly response to external biotic stimulus cellular component organization or biogenesis positive regulation of innate immune response defense response protein-containing complex organization positive regulation of cellular component biogenesis defense response to symbiont regulation of cellular component biogenesis immune system process adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway adenylate cyclase-modulating G protein-coupled receptor signaling pathway cellular response to endogenous stimulus response to hepatocyte growth factor cellular response to growth factor stimulus cellular response to hepatocyte growth factor stimulus establishment of protein localization nitrogen compound transport positive regulation of establishment of protein localization positive regulation of insulin secretion intracellular protein localization regulation of peptide hormone secretion regulation of hormone levels positive regulation of peptide hormone secretion establishment of protein localization to extracellular region protein secretion regulation of protein secretion regulation of secretion positive regulation of protein localization regulation of hormone secretion regulation of protein localization regulation of peptide secretion positive regulation of secretion by cell hormone secretion protein localization to extracellular region positive regulation of protein transport peptide secretion regulation of secretion by cell secretion by cell positive regulation of hormone secretion positive regulation of secretion signal release positive regulation of peptide secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling regulation of protein transport positive regulation of protein secretion peptide transport protein transport regulation of insulin secretion peptide hormone secretion macromolecule localization hormone transport insulin secretion detection of stimulus response to metal ion detection of chemical stimulus detection of calcium ion response to calcium ion	cell periphery presynapse cellular anatomical structure synapse cell junction membrane plasma membrane presynaptic membrane plasma membrane region synaptic membrane basal part of cell basal plasma membrane basolateral plasma membrane glutamatergic synapse cell periphery presynapse cellular anatomical structure synapse cell junction membrane plasma membrane presynaptic membrane plasma membrane region synaptic membrane basal part of cell basal plasma membrane basolateral plasma membrane glutamatergic synapse somatodendritic compartment cell body neuronal cell body apical part of cell apical plasma membrane cell surface axon neuron projection axon terminus plasma membrane bounded cell projection cell projection distal axon neuron projection terminus

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A, C	IPR017978	GPCR family 3, C-terminal	Domain
A, C	IPR017979	GPCR, family 3, conserved site	Conserved Site
A, C	IPR000068	GPCR, family 3, extracellular calcium-sensing receptor-related	Family
A, C	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A, C	IPR001828	Receptor, ligand binding region	Domain
A, C	IPR000337	GPCR, family 3	Family
A, C	IPR038550	GPCR, family 3, nine cysteines domain superfamily	Homologous Superfamily
A, C	IPR011500	GPCR, family 3, nine cysteines domain	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A, C	: P41180	hypercalcemia disease hyperparathyroidism hypoparathyroidism neonatal severe primary hyperparathyroidism autosomal dominant hypocalcemia Hypocalcemia familial hypocalciuric hypercalcemia 1 epilepsy, idiopathic generalized, susceptibility to, 8 familial hypoparathyroidism nephrolithiasis autosomal dominant hypocalcemia 1 psoriasis hypoparathyroidism, familial isolated 1 intellectual disability osteosarcoma hypercalcemia disease hyperparathyroidism hypoparathyroidism neonatal severe primary hyperparathyroidism autosomal dominant hypocalcemia Hypocalcemia familial hypocalciuric hypercalcemia 1 epilepsy, idiopathic generalized, susceptibility to, 8 familial hypoparathyroidism nephrolithiasis autosomal dominant hypocalcemia 1 psoriasis hypoparathyroidism, familial isolated 1 intellectual disability osteosarcoma acne Bartter syndrome with hypocalcemia secondary hyperparathyroidism hyperphosphatemia lung carcinoma pancreatitis primary hyperparathyroidism EIG1 Sjogren syndrome familial hypocalciuric hypercalcemia Hashimoto thyroiditis osteogenesis imperfecta epilepsy

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A, C	OPM	Transmembrane	Alpha-helical polytopic	Rhodopsin-like receptors and pumps	GPCR Metabotropic glutamate receptor (C) family

Membrane Protein Annotation: PDBTM PDBTM Database Homepage

Chains	External Link	Comment
A, C	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A, C	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A, C	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	G Protein-Coupled Receptors: Class C	Calcium-Sensing Receptor (CaSR) homodimer in complex with NB2D11, inactive

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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.