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)
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)
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)

Domain Annotation: ECOD Classification ECOD Database Homepage

Chains	Family Name	Domain Identifier	Architecture	Possible Homology	Homology	Topology	Family	Provenance Source (Version)
C [auth D]		e6n51D1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: C1-set	F:	ECOD (20:10:01)
B [auth C]		e6n51C1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: C1-set	F:	ECOD (20:10:01)
D [auth A]		e6n51A1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: C1-set	F:	ECOD (20:10:01)
A [auth B]		e6n51B1	A: PriB N-terminal domain-like	X: Rubredoxin-related	H: Aconitase iron-sulfur domain	T: zf-B_box	F:	ECOD (20:10:01)

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 (2026-03-13)

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
B [auth C], C [auth D]	Nanobody 43	-	-	-
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 protein binding binding A2A adenosine receptor binding signaling receptor binding G protein-coupled receptor binding 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 protein binding binding A2A adenosine receptor binding signaling receptor binding G protein-coupled receptor binding adenosine receptor binding protein tyrosine kinase binding kinase binding enzyme binding protein kinase binding identical protein binding 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 G protein-coupled receptor activity involved in regulation of postsynaptic membrane potential	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 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 response to chemical response to antibiotic cellular localization protein localization to nucleus localization within membrane protein localization to membrane protein localization to nuclear envelope localization protein localization to organelle macromolecule localization intracellular protein localization protein localization to nuclear inner membrane multicellular organismal process system process 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 response to ketone response to lipid response to endogenous stimulus response to alcohol response to glucocorticoid response to oxygen-containing compound response to corticosterone response to mineralocorticoid response to corticosteroid response to hormone response to steroid hormone 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 response to morphine response to isoquinoline alkaloid response to nitrogen compound response to alkaloid trans-synaptic signaling synaptic signaling anterograde trans-synaptic signaling cell-cell signaling chemical synaptic transmission sensory perception of hot stimulus thermoception sensory perception sensory perception of temperature stimulus behavior learning learning or memory conditioned place preference associative learning cell surface receptor signaling pathway glutamate receptor signaling pathway G protein-coupled glutamate receptor signaling pathway cell population proliferation positive regulation of cell population proliferation positive regulation of neural precursor cell proliferation regulation of cell population proliferation neural precursor cell proliferation regulation of neural precursor cell proliferation positive regulation of cytosolic calcium ion concentration regulation of biological quality locomotory behavior regulation of system process sensory perception of pain regulation of nervous system process positive regulation of nervous system process positive regulation of multicellular organismal process regulation of sensory perception regulation of multicellular organismal process regulation of sensory perception of pain positive regulation of sensory perception of pain regulation of cellular response to hypoxia cellular response to oxygen levels cellular response to hypoxia regulation of cellular response to stress cellular response to decreased oxygen levels cellular response to stress regulation of response to stress response to stress positive regulation of cellular response to hypoxia response to decreased oxygen levels cellular response to chemical stimulus response to hypoxia response to oxygen levels response to abiotic stimulus monoamine transport regulation of localization nitrogen compound transport regulation of catecholamine secretion transport organic hydroxy compound transport positive regulation of secretion by cell dopamine transport positive regulation of amine transport secretion by cell regulation of secretion by cell catecholamine transport positive regulation of secretion signal release secretion regulation of transport positive regulation of catecholamine secretion export from cell dopamine secretion establishment of localization positive regulation of dopamine secretion regulation of secretion catecholamine secretion amine transport positive regulation of transport regulation of amine transport regulation of dopamine secretion cellular component organization cell junction organization synapse organization cellular component organization or biogenesis response to ethanol cell projection organization neuron projection development multicellular organism development cell projection morphogenesis negative regulation of dendritic spine morphogenesis neuron differentiation neuron projection morphogenesis cell differentiation anatomical structure development regulation of synapse structure or activity dendritic spine morphogenesis system development developmental process dendritic spine development postsynapse organization dendritic spine organization negative regulation of cellular component organization regulation of cell projection organization regulation of postsynapse organization nervous system development generation of neurons regulation of neuron projection development regulation of cellular component organization cellular developmental process regulation of developmental process plasma membrane bounded cell projection morphogenesis cell development negative regulation of dendritic spine development regulation of dendritic spine development cell morphogenesis neurogenesis dendrite development negative regulation of cell projection organization regulation of anatomical structure morphogenesis plasma membrane bounded cell projection organization negative regulation of developmental process dendrite morphogenesis cell morphogenesis involved in neuron differentiation negative regulation of neuron projection development anatomical structure morphogenesis regulation of synapse organization neuron development regulation of dendritic spine morphogenesis neuron projection organization regulation of plasma membrane bounded cell projection organization positive regulation of MAPK cascade regulation of MAPK cascade MAPK cascade phospholipase C-activating G protein-coupled glutamate receptor signaling pathway phospholipase C-activating G protein-coupled receptor signaling pathway modulation of chemical synaptic transmission negative regulation of synaptic transmission regulation of synaptic plasticity regulation of trans-synaptic signaling long-term synaptic depression regulation of long-term synaptic depression multicellular organismal-level homeostasis homeostatic process temperature homeostasis regulation of postsynaptic membrane potential chemical synaptic transmission, postsynaptic modulation of excitatory postsynaptic potential negative regulation of excitatory postsynaptic potential excitatory postsynaptic potential regulation of membrane potential response to amine response to amphetamine positive regulation of nervous system development regulation of long-term neuronal synaptic plasticity regulation of cell differentiation regulation of neurogenesis regulation of cell development regulation of nervous system development positive regulation of developmental process positive regulation of cell differentiation positive regulation of long-term neuronal synaptic plasticity positive regulation of neurogenesis regulation of neuronal synaptic plasticity regulation of multicellular organismal development positive regulation of cell development synaptic transmission, glutamatergic regulation of synaptic transmission, glutamatergic operant conditioning cellular response to nitrogen compound cellular response to amyloid-beta cellular response to oxygen-containing compound 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 somatodendritic compartment cell projection dendrite dendritic tree neuron projection plasma membrane bounded cell projection intracellular anatomical structure cytoplasm glutamatergic synapse dendritic shaft neuron spine dendritic spine membrane-bounded organelle organelle inner membrane nuclear membrane nucleus intracellular membrane-bounded organelle endomembrane system intracellular organelle organelle envelope nuclear inner membrane nuclear envelope organelle membrane cell body neuronal cell body glial cell projection astrocyte projection Schaffer collateral - CA1 synapse

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]	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
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
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]	IPR019588	Metabotropic glutamate receptor, Homer-binding domain	Domain
A [auth B], D [auth A]	IPR000202	GPCR, family 3, metabotropic glutamate receptor 5	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 retinal detachment 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 retinal detachment endogenous depression 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. RCSB PDB uses resources of the National Energy Research Scientific Computing Center (NERSC), a Department of Energy User Facility.