6N51 | pdb_00006n51

Metabotropic Glutamate Receptor 5 bound to L-quisqualate and Nb43

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)
A [auth B]	SCOP2B Superfamily	TNF receptor-like	8091094	3000971	SCOP2B (2022-06-29)
A [auth B]	SCOP2B Superfamily	Type 1 solute binding protein-like	8078795	3000125	SCOP2B (2022-06-29)
A [auth B]	SCOP2B Superfamily	G protein-coupled receptor-like	8091093	3000473	SCOP2B (2022-06-29)
D [auth A]	SCOP2 Family	Class C G protein-coupled receptor-like	8047350	4005598	SCOP2 (2022-06-29)
D [auth A]	SCOP2 Family	Metabotropic glutamate receptor, ligand-binding domain-like	8078794	4007730	SCOP2 (2022-06-29)
D [auth A]	SCOP2 Family	Glutamate receptor cysteine-rich domain-like	8079916	4006602	SCOP2 (2022-06-29)
D [auth A]	SCOP2 Superfamily	G protein-coupled receptor-like	8091093	3000473	SCOP2 (2022-06-29)
D [auth A]	SCOP2 Superfamily	Type 1 solute binding protein-like	8078795	3000125	SCOP2 (2022-06-29)
D [auth A]	SCOP2 Superfamily	TNF receptor-like	8091094	3000971	SCOP2 (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 [auth B]	7tm_3	e6n51B1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: 7tm_3	ECOD (1.6)
A [auth B]	ANF_receptor_2nd_1	e6n51B2	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: ANF_receptor_2nd_1	ECOD (1.6)
A [auth B]	NCD3G	e6n51B4	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: TNF receptor-like	F: NCD3G	ECOD (1.6)
D [auth A]	7tm_3	e6n51A1	A: alpha bundles	X: Family A G protein-coupled receptor-like (From Topology)	H: Family A G protein-coupled receptor-like (From Topology)	T: Family A G protein-coupled receptor-like	F: 7tm_3	ECOD (1.6)
D [auth A]	ANF_receptor_2nd_1	e6n51A3	A: a/b three-layered sandwiches	X: Flavodoxin-like	H: Class I glutamine amidotransferase-like	T: Periplasmic binding protein-like I	F: ANF_receptor_2nd_1	ECOD (1.6)
D [auth A]	NCD3G	e6n51A4	A: few secondary structure elements	X: EGF-like	H: EGF-related	T: EGF/Laminin	F: NCD3G	ECOD (1.6)
B [auth C]	V-set_8	e6n51C1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)
C [auth D]	V-set_8	e6n51D1	A: beta sandwiches	X: Immunoglobulin-like beta-sandwich	H: Immunoglobulin-related	T: Immunoglobulin/Fibronectin type III/E set domains/PapD-like	F: V-set_8	ECOD (1.6)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
B [auth C], C [auth D]	Heavy Chain	IGHV1	-	metabotropic glutamate receptor 5	SAbDab (2025-09-26)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth B], D [auth A]	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 [auth B], D [auth A]	PF07562	Nine Cysteines Domain of family 3 GPCR (NCD3G)	Nine Cysteines Domain of family 3 GPCR	-	Family
A [auth B], D [auth A]	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
A [auth B], D [auth A]	Metabotropic glutamate receptor 5	protein tyrosine kinase activator activity enzyme regulator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity glutamate receptor activity G protein-coupled glutamate receptor activity molecular transducer activity adenylate cyclase inhibiting G protein-coupled glutamate receptor activity G protein-coupled receptor activity protein tyrosine kinase activator activity enzyme regulator activity kinase activator activity enzyme activator activity molecular function activator activity molecular function regulator activity protein kinase activator activity protein kinase regulator activity kinase regulator activity glutamate receptor activity G protein-coupled glutamate receptor activity molecular transducer activity adenylate cyclase inhibiting G protein-coupled glutamate receptor activity G protein-coupled receptor activity transmembrane signaling receptor activity signaling receptor activity protein binding binding A2A adenosine receptor binding signaling receptor binding G protein-coupled receptor binding adenosine receptor binding neurotransmitter receptor activity involved in regulation of postsynaptic cytosolic calcium ion concentration neurotransmitter receptor activity postsynaptic neurotransmitter receptor activity G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding identical protein binding	behavior multicellular organismal process locomotory behavior cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus behavior multicellular organismal process locomotory behavior cellular response to stimulus positive regulation of cell communication regulation of cellular process positive regulation of signal transduction response to stimulus signaling positive regulation of biological process regulation of signal transduction intracellular signal transduction cell communication positive regulation of response to stimulus regulation of intracellular signal transduction intracellular signaling cassette regulation of calcium-mediated signaling positive regulation of calcium-mediated signaling signal transduction positive regulation of cellular process regulation of biological process regulation of signaling biological regulation positive regulation of intracellular signal transduction regulation of response to stimulus calcium-mediated signaling regulation of cell communication cellular process positive regulation of signaling system process learning learning or memory nervous system process cognition negative adaptation of signaling pathway negative regulation of signaling negative regulation of biological process desensitization of G protein-coupled receptor signaling pathway negative regulation of G protein-coupled receptor signaling pathway negative regulation of cell communication negative regulation of cellular process regulation of G protein-coupled receptor signaling pathway negative regulation of response to stimulus negative regulation of signal transduction adaptation of signaling pathway G protein-coupled receptor signaling pathway cellular component organization cell junction organization synapse organization cellular component organization or biogenesis positive regulation of MAPK cascade regulation of MAPK cascade MAPK cascade RNA metabolic process regulation of primary metabolic process nucleobase-containing compound metabolic process RNA biosynthetic process nucleic acid biosynthetic process DNA-templated transcription regulation of RNA metabolic process regulation of nucleobase-containing compound metabolic process regulation of RNA biosynthetic process regulation of biosynthetic process primary metabolic process regulation of macromolecule metabolic process nucleobase-containing compound biosynthetic process gene expression macromolecule biosynthetic process nucleic acid metabolic process regulation of gene expression biosynthetic process metabolic process regulation of macromolecule biosynthetic process regulation of DNA-templated transcription macromolecule metabolic process regulation of metabolic process trans-synaptic signaling synaptic signaling anterograde trans-synaptic signaling cell-cell signaling chemical synaptic transmission cell surface receptor signaling pathway phospholipase C-activating G protein-coupled glutamate receptor signaling pathway glutamate receptor signaling pathway G protein-coupled glutamate receptor signaling pathway phospholipase C-activating G protein-coupled receptor signaling pathway positive regulation of nervous system development regulation of long-term neuronal synaptic plasticity regulation of developmental process cellular developmental process modulation of chemical synaptic transmission cell development regulation of cell differentiation regulation of neurogenesis regulation of cell development regulation of nervous system development positive regulation of developmental process multicellular organism development neurogenesis positive regulation of cell differentiation cell differentiation anatomical structure development positive regulation of long-term neuronal synaptic plasticity positive regulation of neurogenesis regulation of multicellular organismal process regulation of biological quality system development regulation of neuronal synaptic plasticity regulation of synaptic plasticity developmental process regulation of multicellular organismal development positive regulation of cell development nervous system development regulation of trans-synaptic signaling positive regulation of multicellular organismal process synaptic transmission, glutamatergic regulation of synaptic transmission, glutamatergic cellular response to nitrogen compound response to oxygen-containing compound response to nitrogen compound cellular response to amyloid-beta cellular response to oxygen-containing compound cellular response to chemical stimulus response to chemical response to amyloid-beta	postsynaptic specialization membrane postsynaptic specialization synapse membrane plasma membrane postsynaptic density membrane synaptic membrane cell periphery postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse organelle cell junction postsynaptic specialization membrane postsynaptic specialization synapse membrane plasma membrane postsynaptic density membrane synaptic membrane cell periphery postsynaptic density postsynapse cellular anatomical structure neuron to neuron synapse organelle cell junction postsynaptic membrane asymmetric synapse plasma membrane region glial cell projection cell projection plasma membrane bounded cell projection astrocyte projection somatodendritic compartment dendrite dendritic tree neuron projection intracellular anatomical structure cytoplasm glutamatergic synapse dendritic shaft neuron spine dendritic spine Schaffer collateral - CA1 synapse cell body neuronal cell body
B [auth C], C [auth D]	Nanobody 43	-	-	-

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth B], D [auth A]	IPR017978	GPCR family 3, C-terminal	Domain
A [auth B], D [auth A]	IPR017979	GPCR, family 3, conserved site	Conserved Site
A [auth B], D [auth A]	IPR000337	GPCR, family 3	Family
A [auth B], D [auth A]	IPR038550	GPCR, family 3, nine cysteines domain superfamily	Homologous Superfamily
A [auth B], D [auth A]	IPR011500	GPCR, family 3, nine cysteines domain	Domain
A [auth B], D [auth A]	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A [auth B], D [auth A]	IPR019588	Metabotropic glutamate receptor, Homer-binding domain	Domain
A [auth B], D [auth A]	IPR000202	GPCR, family 3, metabotropic glutamate receptor 5	Family
A [auth B], D [auth A]	IPR000162	GPCR, family 3, metabotropic glutamate receptor	Family
A [auth B], D [auth A]	IPR001828	Receptor, ligand binding region	Domain
A [auth B], D [auth A]	IPR050726	Metabotropic Glutamate Receptor	Family

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
A [auth B], D [auth A]	Pharos: P41594	status epilepticus diabetic neuropathy diabetic polyneuropathy schizophrenia attention deficit hyperactivity disorder, inattentive type bipolar disorder neuralgia cocaine abuse temporal lobe epilepsy cocaine dependence diabetic autonomic neuropathy Organic Mental Disorders, Substance-Induced pituitary cancer drug dependence endogenous depression status epilepticus diabetic neuropathy diabetic polyneuropathy schizophrenia attention deficit hyperactivity disorder, inattentive type bipolar disorder neuralgia cocaine abuse temporal lobe epilepsy cocaine dependence diabetic autonomic neuropathy Organic Mental Disorders, Substance-Induced pituitary cancer drug dependence endogenous depression retinal detachment skin basal cell carcinoma astrocytic tumor major depressive disorder substance dependence medulloblastoma autism spectrum disorder cleft lip X-linked mixed deafness with perilymphatic gusher endometriosis fragile X syndrome squamous cell carcinoma hypertensive disorder substance abuse malignant ependymoma melanoma oligodendroglioma psoriasis glioblastoma large cell medulloblastoma malignant glioma substance-related disorder atypical teratoid rhabdoid tumor cancer vitiligo cutaneous melanoma

Membrane Protein Annotation: OPM OPM Database Homepage

Chains	External Link	Type	Class	Superfamily	Family
A [auth B], D [auth A]	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 [auth B], D [auth A]	PDBTM	Annotated as membrane protein by PDBTM

Membrane Protein Annotation: MemProtMD MemProtMD Database Homepage

Chains	External Link	Comment
A [auth B], D [auth A]	MemProtMD	Annotated as membrane protein by MemProtMD

Membrane Protein Annotation: mpstruc mpstruc Database Homepage

Chains	Resource Link	Group	Subgroup	Protein
A [auth B], D [auth A]	mpstruc	TRANSMEMBRANE PROTEINS: ALPHA-HELICAL	G Protein-Coupled Receptors: Class C	Metabotropic Glutamate Receptor 5 (mGlu5) apo form

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.