3V00 | pdb_00003v00

Studies of a constitutively active G-alpha subunit provide insights into the mechanism of G protein activation.

External Resource: Annotation

Domain Annotation: SCOP2 Classification
Domain Annotation: ECOD Classification
Domain Annotation: CATH
Protein Family Annotation
Gene Ontology: Gene Product Annotation
InterPro: Protein Family Classification

Domain Annotation: SCOP2 Classification SCOP2 Database Homepage

Chains	Type	Family Name	Domain Identifier	Family Identifier	Provenance Source (Version)
C [auth A]	SCOP2B Superfamily	Ras-like P-loop GTPases	8056788	3002022	SCOP2B (2022-06-29)
C [auth A]	SCOP2B Superfamily	Galpha insert domain-like	8056789	3000669	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Galpha insert domain-like	8056789	3000669	SCOP2B (2022-06-29)
B	SCOP2B Superfamily	Ras-like P-loop GTPases	8056788	3002022	SCOP2B (2022-06-29)
A [auth C]	SCOP2B Superfamily	Ras-like P-loop GTPases	8056788	3002022	SCOP2B (2022-06-29)
A [auth C]	SCOP2B Superfamily	Galpha insert domain-like	8056789	3000669	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 A]	Rrf2	e3v00A1	A: beta barrels	X: beta-Grasp	H: HTH	T: winged helix domain	F: Rrf2	ECOD (v294.2)
B	Rrf2	e3v00B1	A: beta barrels	X: beta-Grasp	H: HTH	T: winged helix domain	F: Rrf2	ECOD (v294.2)
A [auth C]	APH	e3v00C1	A: beta barrels	X: cradle loop barrel	H: RIFT-related	T: acid protease	F: APH	ECOD (v294.2)

Domain Annotation: CATH CATH Database Homepage

Chain	Domain	Class	Architecture	Topology	Homology	Provenance Source (Version)
C [auth A]	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
C [auth A]	1.10.400.10	Mainly Alpha	Orthogonal Bundle	GI Alpha 1, domain 2-like	GI Alpha 1, domain 2-like	CATH (4.3.0)
B	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
B	1.10.400.10	Mainly Alpha	Orthogonal Bundle	GI Alpha 1, domain 2-like	GI Alpha 1, domain 2-like	CATH (4.3.0)
A [auth C]	3.40.50.300	Alpha Beta	3-Layer(aba) Sandwich	Rossmann fold	P-loop containing nucleotide triphosphate hydrolases	CATH (4.3.0)
A [auth C]	1.10.400.10	Mainly Alpha	Orthogonal Bundle	GI Alpha 1, domain 2-like	GI Alpha 1, domain 2-like	CATH (4.3.0)

Protein Family Annotation Pfam Database Homepage

Chains	Accession	Name	Description	Comments	Source
A [auth C], B, C [auth A]	PF00503	G-protein alpha subunit (G-alpha)	G-protein alpha subunit	G proteins couple receptors of extracellular signals to intracellular signaling pathways. The G protein alpha subunit binds guanyl nucleotide and is a weak GTPase. A set of residues that are unique to G-alpha as compared to its ancestor the Arf-like ...	G proteins couple receptors of extracellular signals to intracellular signaling pathways. The G protein alpha subunit binds guanyl nucleotide and is a weak GTPase. A set of residues that are unique to G-alpha as compared to its ancestor the Arf-like family form a ring of residues centered on the nucleotide binding site [3]. A Ggamma is found fused to an inactive Galpha in the Dictyostelium protein gbqA [3].	Domain

Gene Ontology: Gene Product Annotation Gene Ontology Database Homepage

Chains	Polymer	Molecular Function	Biological Process	Cellular Component
A [auth C], B, C [auth A]	Guanine nucleotide-binding protein G(t) subunit alpha-1/ Guanine nucleotide-binding protein G(i) subunit alpha-1 chimeric protein	guanyl nucleotide binding binding nucleotide binding GDP binding guanyl ribonucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding guanyl nucleotide binding binding nucleotide binding GDP binding guanyl ribonucleotide binding purine ribonucleotide binding nucleoside phosphate binding ion binding purine nucleotide binding anion binding heterocyclic compound binding carbohydrate derivative binding ribonucleotide binding small molecule binding protein binding kinase binding enzyme binding protein kinase binding protein-containing complex binding G-protein beta/gamma-subunit complex binding signaling receptor binding G protein-coupled receptor binding acyl binding GTP binding purine ribonucleoside triphosphate binding cation binding metal ion 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 D2 dopamine receptor binding dopamine receptor binding enzyme regulator activity adenylate cyclase inhibitor activity cyclase regulator activity molecular function inhibitor activity cyclase inhibitor activity molecular function regulator activity enzyme inhibitor activity adenylate cyclase regulator activity GTPase activating protein binding magnesium ion binding G protein-coupled serotonin receptor binding G protein activity	detection of light stimulus involved in visual perception detection of light stimulus response to light stimulus multicellular organismal process detection of external stimulus sensory perception of light stimulus system process nervous system process response to stimulus response to external stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of light stimulus involved in sensory perception detection of light stimulus involved in visual perception detection of light stimulus response to light stimulus multicellular organismal process detection of external stimulus sensory perception of light stimulus system process nervous system process response to stimulus response to external stimulus detection of abiotic stimulus detection of stimulus sensory perception detection of light stimulus involved in sensory perception response to abiotic stimulus response to radiation visual perception detection of stimulus involved in sensory perception phototransduction cellular response to stimulus regulation of biological process regulation of cellular process signaling biological regulation detection of visible light cell communication cellular process signal transduction phototransduction, visible light negative regulation of hydrolase activity regulation of molecular function regulation of catalytic activity regulation of hydrolase activity negative regulation of cyclic-nucleotide phosphodiesterase activity negative regulation of molecular function negative regulation of catalytic activity adenylate cyclase-modulating G protein-coupled receptor signaling pathway G protein-coupled receptor signaling pathway protein localization to postsynaptic specialization membrane protein localization to postsynaptic membrane protein localization to cell periphery cellular localization protein localization to synapse localization within membrane protein localization to membrane protein-containing complex localization neurotransmitter receptor localization to postsynaptic specialization membrane localization regulation of postsynaptic membrane neurotransmitter receptor levels macromolecule localization protein localization to organelle protein localization to postsynapse intracellular protein localization regulation of biological quality protein localization to cell junction receptor localization to synapse adenylate cyclase-inhibiting serotonin receptor signaling pathway G protein-coupled serotonin receptor signaling pathway adenylate cyclase-inhibiting G protein-coupled receptor signaling pathway cell division leukocyte migration immune system process mononuclear cell migration lymphocyte migration cell migration T cell migration cell motility regulation of steroid biosynthetic process regulation of cholesterol biosynthetic process regulation of cholesterol metabolic process steroid metabolic process regulation of lipid metabolic process sterol metabolic process positive regulation of biological process cholesterol metabolic process lipid biosynthetic process alcohol metabolic process regulation of primary metabolic process positive regulation of metabolic process regulation of small molecule metabolic process positive regulation of biosynthetic process positive regulation of lipid metabolic process small molecule metabolic process steroid biosynthetic process positive regulation of cellular process regulation of biosynthetic process secondary alcohol biosynthetic process regulation of alcohol biosynthetic process small molecule biosynthetic process regulation of steroid metabolic process cholesterol biosynthetic process positive regulation of cholesterol biosynthetic process primary metabolic process secondary alcohol metabolic process positive regulation of steroid biosynthetic process biosynthetic process sterol biosynthetic process positive regulation of lipid biosynthetic process regulation of sterol biosynthetic process alcohol biosynthetic process positive regulation of cholesterol metabolic process positive regulation of steroid metabolic process metabolic process regulation of lipid biosynthetic process positive regulation of small molecule metabolic process regulation of metabolic process positive regulation of alcohol biosynthetic process positive regulation of sterol biosynthetic process lipid metabolic process cell surface receptor signaling pathway response to cytokine response to chemokine cytokine-mediated signaling pathway cellular response to chemokine chemokine-mediated signaling pathway response to peptide response to chemical cellular response to cytokine stimulus negative regulation of protein transport regulation of localization establishment of protein localization nitrogen compound transport negative regulation of biological process negative regulation of transport negative regulation of secretion negative regulation of hormone secretion negative regulation of secretion by cell regulation of peptide hormone secretion negative regulation of peptide hormone secretion regulation of hormone levels establishment of protein localization to extracellular region negative regulation of establishment of protein localization protein secretion establishment of localization regulation of protein secretion regulation of secretion negative regulation of protein secretion regulation of hormone secretion regulation of protein localization regulation of peptide secretion transport negative regulation of signaling hormone secretion negative regulation of cell communication protein localization to extracellular region negative regulation of peptide secretion peptide secretion regulation of secretion by cell secretion by cell signal release negative regulation of cellular process negative regulation of protein localization regulation of signaling regulation of transport secretion regulation of peptide transport regulation of establishment of protein localization export from cell cell-cell signaling regulation of protein transport peptide transport negative regulation of insulin secretion protein transport regulation of insulin secretion peptide hormone secretion hormone transport regulation of cell communication insulin secretion regulation of cytoskeleton organization regulation of cellular component organization microtubule cytoskeleton organization regulation of mitotic spindle organization mitotic cell cycle cellular component organization cell cycle cellular component organization or biogenesis regulation of cell cycle microtubule cytoskeleton organization involved in mitosis spindle organization cell cycle process regulation of cell cycle process regulation of microtubule-based process regulation of spindle organization regulation of organelle organization mitotic spindle organization organelle organization mitotic cell cycle process microtubule-based process cytoskeleton organization regulation of microtubule cytoskeleton organization positive regulation of protein localization to cell periphery positive regulation of protein localization to cell cortex regulation of protein localization to cell periphery regulation of protein localization to cell cortex positive regulation of protein localization protein localization to cell cortex response to ketone response to prostaglandin response to lipid response to hormone response to endogenous stimulus response to alcohol response to prostaglandin E response to oxygen-containing compound trans-synaptic signaling modulation of chemical synaptic transmission negative regulation of synaptic transmission chemical synaptic transmission synaptic signaling regulation of trans-synaptic signaling anterograde trans-synaptic signaling cellular response to forskolin cellular response to oxygen-containing compound cellular response to chemical stimulus cellular response to alcohol response to forskolin cellular response to lipid cellular response to ketone	membrane-bounded organelle non-motile cilium membrane plasma membrane cilium 9+0 non-motile cilium neuron projection ciliary membrane photoreceptor outer segment membrane photoreceptor outer segment plasma membrane bounded cell projection cell periphery cell projection bounding membrane of organelle membrane-bounded organelle non-motile cilium membrane plasma membrane cilium 9+0 non-motile cilium neuron projection ciliary membrane photoreceptor outer segment membrane photoreceptor outer segment plasma membrane bounded cell projection cell periphery cell projection bounding membrane of organelle cellular anatomical structure photoreceptor cell cilium organelle plasma membrane region organelle membrane cell projection membrane protein-containing complex extrinsic component of plasma membrane catalytic complex plasma membrane protein complex cytoplasmic side of membrane membrane protein complex heterotrimeric G-protein complex side of membrane cytoplasmic side of plasma membrane GTPase complex extrinsic component of membrane extrinsic component of cytoplasmic side of plasma membrane photoreceptor inner segment photoreceptor disc membrane plasma membrane signaling receptor complex G protein-coupled receptor complex signaling receptor complex intracellular anatomical structure cytoplasm midbody nucleus membrane-enclosed lumen intracellular membraneless organelle intracellular membrane-bounded organelle nucleolus intracellular organelle lumen intracellular organelle organelle lumen membraneless organelle nuclear lumen cell cortex centrosome microtubule organizing center cytoskeleton microtubule cytoskeleton centriolar satellite cytosol nucleoplasm synapse cell junction glutamatergic synapse Golgi apparatus endomembrane system postsynapse ciliary basal body

InterPro: Protein Family Classification InterPro Database Homepage

Chains	Accession	Name	Type
A [auth C], B, C [auth A]	IPR001408	G-protein alpha subunit, group I	Family
A [auth C], B, C [auth A]	IPR001019	Guanine nucleotide binding protein, alpha subunit	Family
A [auth C], B, C [auth A]	IPR011025	G protein alpha subunit, helical insertion	Homologous Superfamily
A [auth C], B, C [auth A]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A [auth C], B, C [auth A]	IPR001019	Guanine nucleotide binding protein, alpha subunit	Family
A [auth C], B, C [auth A]	IPR011025	G protein alpha subunit, helical insertion	Homologous Superfamily
A [auth C], B, C [auth A]	IPR027417	P-loop containing nucleoside triphosphate hydrolase	Homologous Superfamily
A [auth C], B, C [auth A]	IPR001408	G-protein alpha subunit, group I	Family

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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.