Q3V3I2
SS
Gene name |
Gnat3 |
Protein name |
Guanine nucleotide-binding protein G |
Names |
t subunit alpha-3 , Gustducin alpha-3 chain |
Species |
Mus musculus (Mouse) |
KEGG Pathway |
mmu:242851 |
EC number |
|
Protein Class |
|
Descriptions
Gαi1 is a G-protein alpha subunit that plays a crucial role in signal transduction pathway initiated by G-protein-coupled receptor (GPCR) activation. G proteins function as transducers downstream of GPCRs in numerous signaling cascades. The alpha subunit contains the guanine nucleotide binding site and alternates between an active (GTP-bound state) and an inactive (GDP-bound state). Activated GPCR induces conformational change in Gαi1, which allows for GDP-to-GTP exchange by binding to the GPCR-binding site within a Ras-like domain, leading to dissociation of the Gαi1 subunit and initiation of downstream signaling.
Autoinhibitory domains (AIDs)
Target domain |
184-348 (Ras-like domain) |
Relief mechanism |
Ligand binding, Partner binding |
Assay |
|
Accessory elements
No accessory elements
References
- Goricanec D et al. (2016) "Conformational dynamics of a G-protein α subunit is tightly regulated by nucleotide binding", Proceedings of the National Academy of Sciences of the United States of America, 113, E3629-38
- Coleman DE et al. (1999) "Structure of Gialpha1.GppNHp, autoinhibition in a galpha protein-substrate complex", The Journal of biological chemistry, 274, 16669-72
- Lutz S et al. (2007) "Structure of Galphaq-p63RhoGEF-RhoA complex reveals a pathway for the activation of RhoA by GPCRs", Science (New York, N.Y.), 318, 1923-7
Autoinhibited structure
Activated structure
1 structures for Q3V3I2
| Entry ID | Method | Resolution | Chain | Position | Source |
|---|---|---|---|---|---|
| AF-Q3V3I2-F1 | Predicted | AlphaFoldDB |
11 variants for Q3V3I2
| Variant ID(s) | Position | Change | Description | Diseaes Association | Provenance |
|---|---|---|---|---|---|
| rs3388738864 | 76 | N>S | No | EVA | |
| rs251574989 | 125 | E>G | No | EVA | |
| rs217591420 | 136 | I>T | No | EVA | |
| rs36929118 | 141 | E>A | No | EVA | |
| rs234228428 | 141 | E>K | No | EVA | |
| rs3395295303 | 170 | N>D | No | EVA | |
| rs3395250298 | 170 | N>S | No | EVA | |
| rs3388750908 | 257 | K>M | No | EVA | |
| rs3388728327 | 261 | T>I | No | EVA | |
| rs3388736951 | 280 | K>E | No | EVA | |
| rs3388741363 | 289 | E>K | No | EVA |
No associated diseases with Q3V3I2
7 regional properties for Q3V3I2
| Type | Name | Position | InterPro Accession |
|---|---|---|---|
| domain | EF-hand domain | 199 - 230 | IPR002048 |
| domain | FAD-binding 8 | 556 - 683 | IPR013112 |
| domain | Ferric reductase, NAD binding domain | 690 - 869 | IPR013121 |
| domain | Ferric reductase transmembrane component-like domain | 356 - 512 | IPR013130 |
| domain | NADPH oxidase Respiratory burst | 96 - 197 | IPR013623 |
| domain | FAD-binding domain, ferredoxin reductase-type | 552 - 686 | IPR017927 |
| binding_site | EF-Hand 1, calcium-binding site | 208 - 220 | IPR018247 |
9 GO annotations of cellular component
| Name | Definition |
|---|---|
| acrosomal vesicle | A structure in the head of a spermatozoon that contains acid hydrolases, and is concerned with the breakdown of the outer membrane of the ovum during fertilization. It lies just beneath the plasma membrane and is derived from the lysosome. |
| apical plasma membrane | The region of the plasma membrane located at the apical end of the cell. |
| axoneme | The bundle of microtubules and associated proteins that forms the core of cilia (also called flagella) in eukaryotic cells and is responsible for their movements. |
| cytoplasm | The contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures. |
| heterotrimeric G-protein complex | Any of a family of heterotrimeric GTP-binding and hydrolyzing proteins; they belong to a superfamily of GTPases that includes monomeric proteins such as EF-Tu and RAS. Heterotrimeric G-proteins consist of three subunits; the alpha subunit contains the guanine nucleotide binding site and possesses GTPase activity; the beta and gamma subunits are tightly associated and function as a beta-gamma heterodimer; extrinsic plasma membrane proteins (cytoplasmic face) that function as a complex to transduce signals from G protein-coupled receptors to an effector protein. |
| photoreceptor inner segment | The inner segment of a vertebrate photoreceptor containing mitochondria, ribosomes and membranes where opsin molecules are assembled and passed to be part of the outer segment discs. |
| photoreceptor outer segment | The outer segment of a vertebrate photoreceptor that contains a stack of membrane discs embedded with photoreceptor proteins. |
| plasma membrane | The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins. |
| protein-containing complex | A stable assembly of two or more macromolecules, i.e. proteins, nucleic acids, carbohydrates or lipids, in which at least one component is a protein and the constituent parts function together. |
5 GO annotations of molecular function
| Name | Definition |
|---|---|
| G protein-coupled receptor binding | Binding to a G protein-coupled receptor. |
| G-protein beta/gamma-subunit complex binding | Binding to a complex of G-protein beta/gamma subunits. |
| GTP binding | Binding to GTP, guanosine triphosphate. |
| GTPase activity | Catalysis of the reaction |
| metal ion binding | Binding to a metal ion. |
8 GO annotations of biological process
| Name | Definition |
|---|---|
| adenylate cyclase-modulating G protein-coupled receptor signaling pathway | A G protein-coupled receptor signaling pathway in which the signal is transmitted via the activation or inhibition of adenylyl cyclase activity and a subsequent change in the intracellular concentration of cyclic AMP (cAMP). |
| detection of chemical stimulus involved in sensory perception of bitter taste | The series of events required for a bitter taste stimulus to be received and converted to a molecular signal. |
| G protein-coupled receptor signaling pathway | The series of molecular signals initiated by a ligand binding to its receptor, in which the activated receptor promotes the exchange of GDP for GTP on the alpha-subunit of an associated heterotrimeric G-protein complex. The GTP-bound activated alpha-G-protein then dissociates from the beta- and gamma-subunits to further transmit the signal within the cell. The pathway begins with receptor-ligand interaction, and ends with regulation of a downstream cellular process. The pathway can start from the plasma membrane, Golgi or nuclear membrane. |
| response to nicotine | Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of a nicotine stimulus. |
| sensory perception of bitter taste | The series of events required to receive a bitter taste stimulus, convert it to a molecular signal, and recognize and characterize the signal. This is a neurological process. |
| sensory perception of sweet taste | The series of events required to receive a sweet taste stimulus, convert it to a molecular signal, and recognize and characterize the signal. This is a neurological process. |
| sensory perception of taste | The series of events required for an organism to receive a gustatory stimulus, convert it to a molecular signal, and recognize and characterize the signal. Gustation involves the direct detection of chemical composition, usually through contact with chemoreceptor cells. This is a neurological process. |
| sensory perception of umami taste | The series of events required to receive an umami taste stimulus, convert it to a molecular signal, and recognize and characterize the signal. Umami taste is the savory taste of meats and other foods that are rich in glutamates. This is a neurological process. |
58 homologous proteins in AiPD
| UniProt AC | Gene Name | Protein Name | Species | Evidence Code |
|---|---|---|---|---|
| P63097 | GNAI1 | Guanine nucleotide-binding protein G | Bos taurus (Bovine) | SS |
| P04696 | GNAT2 | Guanine nucleotide-binding protein G | Bos taurus (Bovine) | SS |
| P04695 | GNAT1 | Guanine nucleotide-binding protein G | Bos taurus (Bovine) | SS |
| P08239 | GNAO1 | Guanine nucleotide-binding protein G | Bos taurus (Bovine) | SS |
| P0C7Q4 | GNAT3 | Guanine nucleotide-binding protein G | Bos taurus (Bovine) | SS |
| P50147 | GNAI2 | Guanine nucleotide-binding protein G | Gallus gallus (Chicken) | SS |
| P50146 | GNAI1 | Guanine nucleotide-binding protein G | Gallus gallus (Chicken) | SS |
| P20353 | Galphai | G protein alpha i subunit | Drosophila melanogaster (Fruit fly) | SS |
| P16378 | Galphao | G protein alpha o subunit | Drosophila melanogaster (Fruit fly) | SS |
| P25157 | cta | Guanine nucleotide-binding protein subunit alpha homolog | Drosophila melanogaster (Fruit fly) | SS |
| P11488 | GNAT1 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| P19087 | GNAT2 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| P09471 | GNAO1 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| Q03113 | GNA12 | Guanine nucleotide-binding protein subunit alpha-12 | Homo sapiens (Human) | SS |
| P04899 | GNAI2 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| P63096 | GNAI1 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | EV |
| P08754 | GNAI3 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| Q14344 | GNA13 | Guanine nucleotide-binding protein subunit alpha-13 | Homo sapiens (Human) | SS |
| P19086 | GNAZ | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| A8MTJ3 | GNAT3 | Guanine nucleotide-binding protein G | Homo sapiens (Human) | SS |
| B2RSH2 | Gnai1 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| O70443 | Gnaz | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| P08752 | Gnai2 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| P20612 | Gnat1 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| P27600 | Gna12 | Guanine nucleotide-binding protein subunit alpha-12 | Mus musculus (Mouse) | SS |
| P27601 | Gna13 | Guanine nucleotide-binding protein subunit alpha-13 | Mus musculus (Mouse) | SS |
| P50149 | Gnat2 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| Q9DC51 | Gnai3 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| P21279 | Gnaq | Guanine nucleotide-binding protein G(q) subunit alpha | Mus musculus (Mouse) | PR |
| P30678 | Gna15 | Guanine nucleotide-binding protein subunit alpha-15 | Mus musculus (Mouse) | PR |
| P18872 | Gnao1 | Guanine nucleotide-binding protein G | Mus musculus (Mouse) | SS |
| P93564 | GPA1 | Guanine nucleotide-binding protein alpha-1 subunit | Solanum tuberosum (Potato) | SS |
| Q63210 | Gna12 | Guanine nucleotide-binding protein subunit alpha-12 | Rattus norvegicus (Rat) | SS |
| P19627 | Gnaz | Guanine nucleotide-binding protein G | Rattus norvegicus (Rat) | SS |
| P04897 | Gnai2 | Guanine nucleotide-binding protein G | Rattus norvegicus (Rat) | SS |
| P59215 | Gnao1 | Guanine nucleotide-binding protein G | Rattus norvegicus (Rat) | SS |
| P08753 | Gnai3 | Guanine nucleotide-binding protein G | Rattus norvegicus (Rat) | SS |
| Q6Q7Y5 | Gna13 | Guanine nucleotide-binding protein subunit alpha-13 | Rattus norvegicus (Rat) | SS |
| P29348 | Gnat3 | Guanine nucleotide-binding protein G | Rattus norvegicus (Rat) | SS |
| Q0DJ33 | GPA1 | Guanine nucleotide-binding protein alpha-1 subunit | Oryza sativa subsp. japonica (Rice) | SS |
| P51875 | goa-1 | Guanine nucleotide-binding protein G | Caenorhabditis elegans | SS |
| Q18434 | odr-3 | Guanine nucleotide-binding protein alpha-17 subunit | Caenorhabditis elegans | SS |
| Q9BIG4 | gpa-10 | Guanine nucleotide-binding protein alpha-10 subunit | Caenorhabditis elegans | PR |
| P28052 | gpa-3 | Guanine nucleotide-binding protein alpha-3 subunit | Caenorhabditis elegans | SS |
| Q9XTB2 | gpa-13 | Guanine nucleotide-binding protein alpha-13 subunit | Caenorhabditis elegans | SS |
| Q9BIG5 | gpa-4 | Guanine nucleotide-binding protein alpha-4 subunit | Caenorhabditis elegans | SS |
| P28051 | gpa-1 | Guanine nucleotide-binding protein alpha-1 subunit | Caenorhabditis elegans | SS |
| Q9N2V6 | gpa-16 | Guanine nucleotide-binding protein alpha-16 subunit | Caenorhabditis elegans | SS |
| P91907 | gpa-15 | Guanine nucleotide-binding protein alpha-15 subunit | Caenorhabditis elegans | SS |
| Q20907 | gpa-8 | Guanine nucleotide-binding protein alpha-8 subunit | Caenorhabditis elegans | PR |
| Q21917 | gpa-7 | Guanine nucleotide-binding protein alpha-7 subunit | Caenorhabditis elegans | SS |
| Q93743 | gpa-6 | Guanine nucleotide-binding protein alpha-6 subunit | Caenorhabditis elegans | SS |
| O76584 | gpa-11 | Guanine nucleotide-binding protein alpha-11 subunit | Caenorhabditis elegans | SS |
| P49084 | GPA1 | Guanine nucleotide-binding protein alpha-1 subunit | Glycine max (Soybean) (Glycine hispida) | SS |
| P93163 | GPA2 | Guanine nucleotide-binding protein alpha-2 subunit | Glycine max (Soybean) (Glycine hispida) | SS |
| O80462 | XLG1 | Extra-large guanine nucleotide-binding protein 1 | Arabidopsis thaliana (Mouse-ear cress) | PR |
| P18064 | GPA1 | Guanine nucleotide-binding protein alpha-1 subunit | Arabidopsis thaliana (Mouse-ear cress) | SS |
| P26981 | GPA1 | Guanine nucleotide-binding protein alpha-1 subunit | Solanum lycopersicum (Tomato) (Lycopersicon esculentum) | SS |
| 10 | 20 | 30 | 40 | 50 | 60 |
| MGSGISSESK | ESARRSKELE | KKLQEDAERD | ARTVKLLLLG | AGESGKSTIV | KQMKIIHKNG |
| 70 | 80 | 90 | 100 | 110 | 120 |
| YSKQECMEFK | AVIYSNTLQS | ILAIVKAMAT | LGIDYVNPRS | REDQEQLHSM | ANTLEDGDMT |
| 130 | 140 | 150 | 160 | 170 | 180 |
| PQLAEIIKRL | WGDPGIQACF | ERASEYQLND | SAAYYLNDLD | RLTAPGYVPN | EQDVLHSRVK |
| 190 | 200 | 210 | 220 | 230 | 240 |
| TTGIIETQFS | FKDLNFRMFD | VGGQRSERKK | WIHCFEGVTC | IIFCAALSAY | DMVLVEDEEV |
| 250 | 260 | 270 | 280 | 290 | 300 |
| NRMHESLHLF | NSICNHKYFA | TTSIVLFLNK | KDLFQEKVAK | VHLSICFPEY | TGPNTFEDAG |
| 310 | 320 | 330 | 340 | 350 | |
| NYIKNQFLDL | NLKKEDKEIY | SHMTCATDTQ | NVKFVFDAVT | DIIIKENLKD | CGLF |