Annotations: 9NOX

Transmembrane domains of the human TAS1R2 sweet receptor subunit in complex with miniGs/gust25

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

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth D]	SCOP2B Superfamily	Transducin (heterotrimeric G protein), gamma chain	8070798	3001771	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 E]	Cofilin_ADF	e9noxE1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Cofilin_ADF	ECOD (v295.2)
C [auth D]	Cofilin_ADF	e9noxD1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Cofilin_ADF	ECOD (v295.2)
B [auth C]	Cofilin_ADF	e9noxC1	A: alpha arrays	X: Hypothetical protein YqbG-like	H: Hypothetical protein YqbG-like	T: alpha/beta-Hydrolases	F: Cofilin_ADF	ECOD (v295.2)

SAbDab Antibody Annotation SAbDab Database Homepage

Chain	Chain Class	Chain Subclass	Chain Type	Antigen Name(s)	Provenance Source
D [auth E]	Heavy Chain	IGHV3	-	minigs/gust25 \| guanine nucleotide-binding protein g(i)/g(s)/g(t) subunitbeta-1	SAbDab (2026-08-28)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
E [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
D [auth E]	Nanobody 35 (NB35)	-	-	-
E [auth A]	Taste receptor type 1 member 2	taste receptor activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity G protein-coupled receptor activity sweet taste receptor activity	sensory perception of sweet taste multicellular organismal process system process sensory perception of chemical stimulus sensory perception nervous system process sensory perception of taste regulation of cytokinesis regulation of biological process regulation of cellular process positive regulation of cell division regulation of cell cycle process biological regulation positive regulation of biological process sensory perception of sweet taste multicellular organismal process system process sensory perception of chemical stimulus sensory perception nervous system process sensory perception of taste regulation of cytokinesis regulation of biological process regulation of cellular process positive regulation of cell division regulation of cell cycle process biological regulation positive regulation of biological process cytokinesis positive regulation of cell cycle regulation of cell division positive regulation of cytokinesis positive regulation of cell cycle process cellular process cell division cell cycle regulation of cell cycle positive regulation of cellular process cell cycle process response to stimulus detection of chemical stimulus involved in sensory perception of sweet taste detection of chemical stimulus involved in sensory perception of taste detection of stimulus response to chemical detection of chemical stimulus detection of stimulus involved in sensory perception detection of chemical stimulus involved in sensory perception cellular response to stimulus signaling G protein-coupled receptor signaling pathway signal transduction cell communication	protein-containing complex signaling receptor complex cellular anatomical structure membrane cell periphery plasma membrane taste receptor complex sweet taste receptor complex
C [auth D]	Guanine nucleotide-binding protein G(I)/G(S)/G(O) subunit gamma-2	protein binding binding G-protein beta-subunit binding	cellular response to nitrogen compound cellular response to stimulus response to dopamine regulation of cellular process response to stimulus signaling cellular response to dopamine response to monoamine cell communication response to catecholamine adenylate cyclase-activating dopamine receptor signaling pathway cellular response to catecholamine stimulus signal transduction regulation of biological process cellular response to nitrogen compound cellular response to stimulus response to dopamine regulation of cellular process response to stimulus signaling cellular response to dopamine response to monoamine cell communication response to catecholamine adenylate cyclase-activating dopamine receptor signaling pathway cellular response to catecholamine stimulus signal transduction regulation of biological process G protein-coupled dopamine receptor signaling pathway biological regulation response to oxygen-containing compound response to nitrogen compound adenylate cyclase-activating G protein-coupled receptor signaling pathway cellular response to oxygen-containing compound cellular response to chemical stimulus cellular response to monoamine stimulus response to chemical adenylate cyclase-modulating G protein-coupled receptor signaling pathway cellular process G protein-coupled receptor signaling pathway response to ketone response to prostaglandin response to lipid response to endogenous stimulus response to alcohol cellular response to prostaglandin stimulus cellular response to endogenous stimulus cellular response to prostaglandin E stimulus cellular response to alcohol response to hormone cellular response to lipid response to prostaglandin E cellular response to ketone cellular response to hormone stimulus	cellular anatomical structure membrane protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane plasma membrane membrane protein complex heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex cellular anatomical structure membrane protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane plasma membrane membrane protein complex heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex extrinsic component of membrane extrinsic component of cytoplasmic side of plasma membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle synapse cell junction
B [auth C]	Guanine nucleotide-binding protein G(I)/G(S)/G(T) subunit beta-1	protein binding binding enzyme binding GTPase binding protein-containing complex binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity signaling receptor complex adaptor activity protein-macromolecule adaptor activity protein binding binding enzyme binding GTPase binding protein-containing complex binding pyrophosphatase activity GTPase activity ribonucleoside triphosphate phosphatase activity hydrolase activity, acting on acid anhydrides, in phosphorus-containing anhydrides hydrolase activity hydrolase activity, acting on acid anhydrides catalytic activity signaling receptor complex adaptor activity protein-macromolecule adaptor activity molecular adaptor activity signaling adaptor activity	cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cellular process signal transduction cell communication response to ketone response to prostaglandin response to lipid response to endogenous stimulus response to alcohol cellular response to stimulus regulation of biological process regulation of cellular process response to stimulus signaling biological regulation cellular process signal transduction cell communication response to ketone response to prostaglandin response to lipid response to endogenous stimulus response to alcohol cellular response to prostaglandin stimulus response to oxygen-containing compound cellular response to oxygen-containing compound cellular response to endogenous stimulus cellular response to prostaglandin E stimulus cellular response to chemical stimulus cellular response to alcohol response to hormone response to chemical cellular response to lipid response to prostaglandin E cellular response to ketone cellular response to hormone stimulus small GTPase-mediated signal transduction Ras protein signal transduction intracellular signal transduction intracellular signaling cassette cellular response to nitrogen compound response to dopamine cellular response to dopamine response to monoamine response to catecholamine adenylate cyclase-activating dopamine receptor signaling pathway cellular response to catecholamine stimulus G protein-coupled dopamine receptor signaling pathway response to nitrogen compound adenylate cyclase-activating G protein-coupled receptor signaling pathway cellular response to monoamine stimulus adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway synaptic signaling cellular response to acetylcholine cell-cell signaling acetylcholine receptor signaling pathway postsynaptic signal transduction G protein-coupled acetylcholine receptor signaling pathway response to acetylcholine	cellular anatomical structure membrane protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane plasma membrane membrane protein complex heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex cellular anatomical structure membrane protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane plasma membrane membrane protein complex heterotrimeric G-protein complex side of membrane cell periphery cytoplasmic side of plasma membrane GTPase complex extrinsic component of membrane extrinsic component of cytoplasmic side of plasma membrane extracellular exosome membrane-bounded organelle extracellular vesicle extracellular organelle extracellular region organelle vesicle extracellular membrane-bounded organelle non-motile cilium 9+0 non-motile cilium cilium neuron projection photoreceptor disc membrane photoreceptor outer segment plasma membrane bounded cell projection cell projection photoreceptor cell cilium organelle membrane intracellular anatomical structure cytoplasm cytosol vacuolar membrane lytic vacuole vacuole intracellular membrane-bounded organelle intracellular organelle lytic vacuole membrane bounding membrane of organelle lysosomal membrane lysosome synapse cell junction
A [auth B]	miniGs/gust25	taste receptor activity molecular transducer activity transmembrane signaling receptor activity signaling receptor activity G protein-coupled receptor activity	sensory perception of sweet taste multicellular organismal process system process sensory perception of chemical stimulus sensory perception nervous system process sensory perception of taste sensory perception of umami taste response to stimulus detection of chemical stimulus involved in sensory perception of sweet taste detection of chemical stimulus involved in sensory perception of taste detection of stimulus response to chemical detection of chemical stimulus sensory perception of sweet taste multicellular organismal process system process sensory perception of chemical stimulus sensory perception nervous system process sensory perception of taste sensory perception of umami taste response to stimulus detection of chemical stimulus involved in sensory perception of sweet taste detection of chemical stimulus involved in sensory perception of taste detection of stimulus response to chemical detection of chemical stimulus detection of stimulus involved in sensory perception detection of chemical stimulus involved in sensory perception cellular response to stimulus regulation of biological process regulation of cellular process signaling biological regulation G protein-coupled receptor signaling pathway cellular process signal transduction cell communication	cellular anatomical structure membrane cell periphery plasma membrane protein-containing complex taste receptor complex signaling receptor complex sweet taste receptor complex

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
E [auth A]	IPR017978	GPCR family 3, C-terminal	Domain
E [auth A]	IPR017979	GPCR, family 3, conserved site	Conserved Site
E [auth A]	IPR011500	GPCR, family 3, nine cysteines domain	Domain
E [auth A]	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
E [auth A]	IPR000337	GPCR, family 3	Family
E [auth A]	IPR000068	GPCR, family 3, extracellular calcium-sensing receptor-related	Family
E [auth A]	IPR038550	GPCR, family 3, nine cysteines domain superfamily	Homologous Superfamily
E [auth A]	IPR001828	Receptor, ligand binding region	Domain
C [auth D]	IPR001770	G-protein, gamma subunit	Family
C [auth D]	IPR015898	G-protein, gamma subunit-like domain	Domain
C [auth D]	IPR036284	G-protein gamma-like domain superfamily	Homologous Superfamily
B [auth C]	IPR019775	WD40 repeat, conserved site	Conserved Site
B [auth C]	IPR020472	PAC1/LIS1-like, WD-40 repeat	Repeat
B [auth C]	IPR001632	G-protein beta subunit-like, WD40 repeats	Domain
B [auth C]	IPR015943	WD40/YVTN repeat-like-containing domain superfamily	Homologous Superfamily
B [auth C]	IPR016346	G-protein subunit beta 1-5	Family
B [auth C]	IPR036322	WD40-repeat-containing domain superfamily	Homologous Superfamily
B [auth C]	IPR001680	WD40 repeat	Repeat
A [auth B]	IPR017978	GPCR family 3, C-terminal	Domain
A [auth B]	IPR017979	GPCR, family 3, conserved site	Conserved Site
A [auth B]	IPR011500	GPCR, family 3, nine cysteines domain	Domain
A [auth B]	IPR028082	Periplasmic binding protein-like I	Homologous Superfamily
A [auth B]	IPR000337	GPCR, family 3	Family
A [auth B]	IPR000068	GPCR, family 3, extracellular calcium-sensing receptor-related	Family
A [auth B]	IPR038550	GPCR, family 3, nine cysteines domain superfamily	Homologous Superfamily
A [auth B]	IPR001828	Receptor, ligand binding region	Domain

Pharos: Disease Associations Pharos Homepage Annotation

Chains	Drug Target	Associated Disease
E [auth A]	: Q8TE23	cleft lip ovarian cancer
C [auth D]	: P59768	pancreatic intraductal papillary-mucinous neoplasm pilocytic astrocytoma sarcoidosis ulcerative colitis adrenal cortex carcinoma breast carcinoma Duchenne muscular dystrophy glioblastoma large cell medulloblastoma medulloblastoma ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia pituitary cancer Sjogren syndrome X-linked mixed deafness with perilymphatic gusher pancreatic intraductal papillary-mucinous neoplasm pilocytic astrocytoma sarcoidosis ulcerative colitis adrenal cortex carcinoma breast carcinoma Duchenne muscular dystrophy glioblastoma large cell medulloblastoma medulloblastoma ovarian cancer pancreatic intraductal papillary-mucinous neoplasm with low grade dysplasia pituitary cancer Sjogren syndrome X-linked mixed deafness with perilymphatic gusher astrocytic tumor Crohn disease ductal breast carcinoma in situ interstitial cystitis lung carcinoma non-small cell lung carcinoma pancreatic intraductal papillary-mucinous carcinoma Pick disease primitive neuroectodermal tumor thoracic aortic aneurysm atypical teratoid rhabdoid tumor cystic fibrosis Emery-Dreifuss muscular dystrophy invasive ductal breast carcinoma malignant ependymoma osteosarcoma
B [auth C]	: P62873	intellectual disability, autosomal dominant 42 melancholia intellectual disability endogenous depression medulloblastoma myopathy ovarian cancer Precursor Cell Lymphoblastic Leukemia Lymphoma Sjogren syndrome anxiety disorder chronic kidney disease juvenile dermatomyositis lung adenocarcinoma neurotic disorder pancreatic ductal adenocarcinoma intellectual disability, autosomal dominant 42 melancholia intellectual disability endogenous depression medulloblastoma myopathy ovarian cancer Precursor Cell Lymphoblastic Leukemia Lymphoma Sjogren syndrome anxiety disorder chronic kidney disease juvenile dermatomyositis lung adenocarcinoma neurotic disorder pancreatic ductal adenocarcinoma subependymal giant cell astrocytoma breast cancer Duchenne muscular dystrophy leukemia, acute lymphocytic, susceptibility to, 1 malignant pancreatic neoplasm myelodysplastic syndrome osteosarcoma plasma cell myeloma rheumatoid arthritis swine influenza childhood acute lymphoblastic leukemia depressive disorder
A [auth B]	: Q7RTX0	male infertility inflammatory bowel disease psoriasis Subfertility, Male ulcerative colitis