UniProtKB - Q9ERZ4 (ACM2_MOUSE)
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Protein
Muscarinic acetylcholine receptor M2
Gene
Chrm2
Organism
Mus musculus (Mouse)
Status
Functioni
The muscarinic acetylcholine receptor mediates various cellular responses, including inhibition of adenylate cyclase, breakdown of phosphoinositides and modulation of potassium channels through the action of G proteins. Primary transducing effect is adenylate cyclase inhibition. Signaling promotes phospholipase C activity, leading to the release of inositol trisphosphate (IP3); this then triggers calcium ion release into the cytosol (By similarity).By similarity
GO - Molecular functioni
- arrestin family protein binding Source: MGI
- drug binding Source: Ensembl
- G-protein coupled acetylcholine receptor activity Source: MGI
GO - Biological processi
- adenylate cyclase-inhibiting G-protein coupled acetylcholine receptor signaling pathway Source: GO_Central
- G-protein coupled acetylcholine receptor signaling pathway Source: MGI
- phospholipase C-activating G-protein coupled acetylcholine receptor signaling pathway Source: GO_Central
- regulation of heart contraction Source: GO_Central
- regulation of smooth muscle contraction Source: GO_Central
- response to virus Source: Ensembl
- synaptic transmission, cholinergic Source: GO_Central
Keywordsi
| Molecular function | G-protein coupled receptor, Receptor, Transducer |
Enzyme and pathway databases
| Reactomei | R-MMU-390648. Muscarinic acetylcholine receptors. R-MMU-418594. G alpha (i) signalling events. R-MMU-8856825. Cargo recognition for clathrin-mediated endocytosis. R-MMU-8856828. Clathrin-mediated endocytosis. |
Names & Taxonomyi
| Protein namesi | Recommended name: Muscarinic acetylcholine receptor M2 |
| Gene namesi | Name:Chrm2 Synonyms:Chrm-2 |
| Organismi | Mus musculus (Mouse) |
| Taxonomic identifieri | 10090 [NCBI] |
| Taxonomic lineagei | Eukaryota › Metazoa › Chordata › Craniata › Vertebrata › Euteleostomi › Mammalia › Eutheria › Euarchontoglires › Glires › Rodentia › Myomorpha › Muroidea › Muridae › Murinae › Mus › Mus |
| Proteomesi |
|
Organism-specific databases
| MGIi | MGI:88397. Chrm2. |
Subcellular locationi
- Cell membrane By similarity; Multi-pass membrane protein By similarity
- Cell junction › synapse › postsynaptic cell membrane By similarity; Multi-pass membrane protein By similarity
Note: Phosphorylation in response to agonist binding promotes receptor internalization.By similarity
Topology
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| Topological domaini | 1 – 22 | ExtracellularBy similarityAdd BLAST | 22 | |
| Transmembranei | 23 – 45 | Helical; Name=1By similarityAdd BLAST | 23 | |
| Topological domaini | 46 – 59 | CytoplasmicBy similarityAdd BLAST | 14 | |
| Transmembranei | 60 – 80 | Helical; Name=2By similarityAdd BLAST | 21 | |
| Topological domaini | 81 – 97 | ExtracellularBy similarityAdd BLAST | 17 | |
| Transmembranei | 98 – 119 | Helical; Name=3By similarityAdd BLAST | 22 | |
| Topological domaini | 120 – 139 | CytoplasmicBy similarityAdd BLAST | 20 | |
| Transmembranei | 140 – 162 | Helical; Name=4By similarityAdd BLAST | 23 | |
| Topological domaini | 163 – 184 | ExtracellularBy similarityAdd BLAST | 22 | |
| Transmembranei | 185 – 209 | Helical; Name=5By similarityAdd BLAST | 25 | |
| Topological domaini | 210 – 387 | CytoplasmicBy similarityAdd BLAST | 178 | |
| Transmembranei | 388 – 410 | Helical; Name=6By similarityAdd BLAST | 23 | |
| Topological domaini | 411 – 418 | ExtracellularBy similarity | 8 | |
| Transmembranei | 419 – 442 | Helical; Name=7By similarityAdd BLAST | 24 | |
| Topological domaini | 443 – 466 | CytoplasmicBy similarityAdd BLAST | 24 |
GO - Cellular componenti
- asymmetric synapse Source: Ensembl
- axon terminus Source: Ensembl
- cell junction Source: UniProtKB-KW
- dendrite Source: Ensembl
- integral component of membrane Source: MGI
- integral component of plasma membrane Source: UniProtKB
- neuronal cell body Source: Ensembl
- plasma membrane Source: MGI
- postsynaptic membrane Source: UniProtKB-SubCell
- symmetric synapse Source: Ensembl
- synapse Source: GO_Central
Keywords - Cellular componenti
Cell junction, Cell membrane, Membrane, Postsynaptic cell membrane, SynapsePTM / Processingi
Molecule processing
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| ChainiPRO_0000069022 | 1 – 466 | Muscarinic acetylcholine receptor M2Add BLAST | 466 |
Amino acid modifications
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| Glycosylationi | 2 | N-linked (GlcNAc...) asparagineSequence analysis | 1 | |
| Glycosylationi | 3 | N-linked (GlcNAc...) asparagineSequence analysis | 1 | |
| Glycosylationi | 6 | N-linked (GlcNAc...) asparagineSequence analysis | 1 | |
| Disulfide bondi | 96 ↔ 176 | PROSITE-ProRule annotation | ||
| Modified residuei | 232 | PhosphoserineCombined sources | 1 | |
| Disulfide bondi | 413 ↔ 416 | PROSITE-ProRule annotation | ||
| Modified residuei | 446 | PhosphothreonineSequence analysis | 1 | |
| Modified residuei | 450 | PhosphothreonineSequence analysis | 1 | |
| Modified residuei | 465 | PhosphothreonineSequence analysis | 1 |
Post-translational modificationi
Phosphorylated in response to agonist treatment.By similarity
Keywords - PTMi
Disulfide bond, Glycoprotein, PhosphoproteinProteomic databases
| PaxDbi | Q9ERZ4. |
| PRIDEi | Q9ERZ4. |
PTM databases
| iPTMneti | Q9ERZ4. |
| PhosphoSitePlusi | Q9ERZ4. |
Interactioni
Subunit structurei
Interacts with ARRB1 and ARRB2. Interacts with RACK1; the interaction regulates CHRM2 internalization (By similarity).By similarity
GO - Molecular functioni
- arrestin family protein binding Source: MGI
Protein-protein interaction databases
| STRINGi | 10090.ENSMUSP00000130874. |
Chemistry databases
| BindingDBi | Q9ERZ4. |
Family & Domainsi
Region
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| Regioni | 103 – 107 | Agonist bindingBy similarity | 5 | |
| Regioni | 403 – 404 | Agonist bindingBy similarity | 2 | |
| Regioni | 426 – 430 | Agonist bindingBy similarity | 5 |
Motif
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| Motifi | 120 – 122 | Important for signaling | 3 | |
| Motifi | 436 – 440 | Important for signaling | 5 |
Sequence similaritiesi
Belongs to the G-protein coupled receptor 1 family. Muscarinic acetylcholine receptor subfamily. CHRM2 sub-subfamily.PROSITE-ProRule annotation
Keywords - Domaini
Transmembrane, Transmembrane helixPhylogenomic databases
| eggNOGi | KOG4220. Eukaryota. ENOG410YCQR. LUCA. |
| GeneTreei | ENSGT00780000121874. |
| HOGENOMi | HOG000231484. |
| HOVERGENi | HBG105720. |
| InParanoidi | Q9ERZ4. |
| KOi | K04130. |
| OMAi | CIKIVTK. |
| OrthoDBi | EOG091G06VI. |
| PhylomeDBi | Q9ERZ4. |
| TreeFami | TF320495. |
Family and domain databases
| InterProi | View protein in InterPro IPR000276. GPCR_Rhodpsn. IPR017452. GPCR_Rhodpsn_7TM. IPR001065. Musac_Ach_M2_rcpt. IPR000995. Musac_Ach_rcpt. |
| PANTHERi | PTHR24249:SF359. PTHR24249:SF359. 1 hit. |
| Pfami | View protein in Pfam PF00001. 7tm_1. 1 hit. |
| PRINTSi | PR00237. GPCRRHODOPSN. PR00243. MUSCARINICR. PR00539. MUSCRINICM2R. |
| PROSITEi | View protein in PROSITE PS00237. G_PROTEIN_RECEP_F1_1. 1 hit. PS50262. G_PROTEIN_RECEP_F1_2. 1 hit. |
Sequencei
Sequence statusi: Complete.
Q9ERZ4-1 [UniParc]FASTAAdd to basket
10 20 30 40 50
MNNSTNSSNN GLAITSPYKT FEVVFIVLVA GSLSLVTIIG NILVMVSIKV
60 70 80 90 100
NRHLQTVNNY FLFSLACADL IIGVFSMNLY TLYTVIGYWP LGPVVCDLWL
110 120 130 140 150
ALDYVVSNAS VMNLLIISFD RYFCVTKPLT YPVKRTTKMA GMMIAAAWVL
160 170 180 190 200
SFILWAPAIL FWQFIVGVRT VEDGECYIQF FSNAAVTFGT AIAAFYLPVI
210 220 230 240 250
IMTVLYWHIS RASKSRIKKE KKEPVANQDP VSPSLVQGRI VKPNNNNMPG
260 270 280 290 300
GDGGLEHNKI QNGKAPRDGG TENCVQGEEK ESSNDSTSVS AVASNMRDDE
310 320 330 340 350
ITQDENTVST SLGHSKDDNS RQTCIKIVTK TQKGDACTPT STTVELVGSS
360 370 380 390 400
GQNGDEKQNI VARKIVKMTK QPAKKKPPPS REKKVTRTIL AILLAFIITW
410 420 430 440 450
APYNVMVLIN TFCAPCIPNT VWTIGYWLCY INSTINPACY ALCNATFKKT
460
FKHLLMCHYK NIGATR
Experimental Info
| Feature key | Position(s) | DescriptionActions | Graphical view | Length |
|---|---|---|---|---|
| Sequence conflicti | 266 | P → L in AAG14343 (Ref. 1) Curated | 1 |
Sequence databases
| Select the link destinations: EMBLi GenBanki DDBJi Links Updated | AF264049 Genomic DNA. Translation: AAG14343.1. AC113246 Genomic DNA. No translation available. AC159505 Genomic DNA. No translation available. |
| CCDSi | CCDS20004.1. |
| RefSeqi | NP_987076.2. NM_203491.3. XP_006506199.1. XM_006506136.2. |
| UniGenei | Mm.448632. |
Genome annotation databases
| Ensembli | ENSMUST00000172278; ENSMUSP00000130874; ENSMUSG00000045613. |
| GeneIDi | 243764. |
| KEGGi | mmu:243764. |
| UCSCi | uc009biy.2. mouse. |
Similar proteinsi
Links to similar proteins from the UniProt Reference Clusters (UniRef) at 100%, 90% and 50% sequence identity:| 100% | UniRef100 combines identical sequences and sub-fragments with 11 or more residues from any organism into one UniRef entry. |
| 90% | UniRef90 is built by clustering UniRef100 sequences that have at least 90% sequence identity to, and 80% overlap with, the longest sequence (a.k.a seed sequence). |
| 50% | UniRef50 is built by clustering UniRef90 seed sequences that have at least 50% sequence identity to, and 80% overlap with, the longest sequence in the cluster. |
Entry informationi
| Entry namei | ACM2_MOUSE | |
| Accessioni | Q9ERZ4Primary (citable) accession number: Q9ERZ4 Secondary accession number(s): E9Q9P0 | |
| Entry historyi | Integrated into UniProtKB/Swiss-Prot: | June 1, 2001 |
| Last sequence update: | July 27, 2011 | |
| Last modified: | June 7, 2017 | |
| This is version 128 of the entry and version 2 of the sequence. See complete history. | ||
| Entry statusi | Reviewed (UniProtKB/Swiss-Prot) | |
| Annotation program | Chordata Protein Annotation Program | |
Miscellaneousi
Keywords - Technical termi
Complete proteome, Reference proteomeDocuments
- 7-transmembrane G-linked receptors
List of 7-transmembrane G-linked receptor entries - MGD cross-references
Mouse Genome Database (MGD) cross-references in UniProtKB/Swiss-Prot - SIMILARITY comments
Index of protein domains and families
