The name of this superfamily has been modified since the most recent official CATH+ release (v4_3_0). At the point of the last release, this superfamily was named:

"
Rhodopsin 7-helix transmembrane proteins
".

Functional Families

Overview of the Structural Clusters (SC) and Functional Families within this CATH Superfamily. Clusters with a representative structure are represented by a filled circle.
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FunFam 38: Muscarinic acetylcholine receptor

Please note: GO annotations are assigned to the full protein sequence rather than individual protein domains. Since a given protein can contain multiple domains, it is possible that some of the annotations below come from additional domains that occur in the same protein, but have been classified elsewhere in CATH.

There are 12 GO terms relating to "molecular function"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
8 P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P10980 (/IDA) P16395 (/IDA) P32211 (/IDA) P32211 (/IDA)
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
8 P06199 (/ISS) P16395 (/ISS) P30372 (/ISS) P41985 (/ISS) P41985 (/ISS) Q9ERZ4 (/ISS) Q9N2A7 (/ISS) Q9N2A7 (/ISS)
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
8 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08173 (/TAS) P08173 (/TAS) P08173 (/TAS) P08485 (/TAS)
Arrestin family protein binding GO:1990763
Interacting selectively and non-covalently with any member of the arrestin family, proteins involved in agonist-mediated desensitization of G protein-coupled receptors.
4 P08172 (/IPI) P08172 (/IPI) P08172 (/IPI) P08172 (/IPI)
Guanyl-nucleotide exchange factor activity GO:0005085
Stimulates the exchange of guanyl nucleotides associated with a GTPase. Under normal cellular physiological conditions, the concentration of GTP is higher than that of GDP, favoring the replacement of GDP by GTP in association with the GTPase.
2 P32211 (/ISO) P32211 (/ISO)
Guanyl-nucleotide exchange factor activity GO:0005085
Stimulates the exchange of guanyl nucleotides associated with a GTPase. Under normal cellular physiological conditions, the concentration of GTP is higher than that of GDP, favoring the replacement of GDP by GTP in association with the GTPase.
1 P08485 (/IDA)
Protein binding GO:0005515
Interacting selectively and non-covalently with any protein or protein complex (a complex of two or more proteins that may include other nonprotein molecules).
1 P08485 (/IPI)
G protein-coupled amine receptor activity GO:0008227
Combining with an extracellular amine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
1 P16395 (/ISS)
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
1 Q9ERZ4 (/IMP)
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
1 Q9ERZ4 (/ISO)
G protein-coupled acetylcholine receptor activity GO:0016907
Combining with acetylcholine and transmitting the signal across the membrane by activating an associated G-protein; promotes the exchange of GDP for GTP on the alpha subunit of a heterotrimeric G-protein complex.
1 P17200 (/NAS)
Arrestin family protein binding GO:1990763
Interacting selectively and non-covalently with any member of the arrestin family, proteins involved in agonist-mediated desensitization of G protein-coupled receptors.
1 Q9ERZ4 (/ISO)

There are 24 GO terms relating to "biological process"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
G protein-coupled acetylcholine receptor signaling pathway GO:0007213
Any series of molecular signals initiated by an acetylcholine receptor on the surface of the target cell binding to one of its physiological ligands, and proceeding with the activated receptor promoting 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, e.g. transcription.
8 P06199 (/ISS) P16395 (/ISS) P30372 (/ISS) P41985 (/ISS) P41985 (/ISS) Q9ERZ4 (/ISS) Q9N2A7 (/ISS) Q9N2A7 (/ISS)
G protein-coupled receptor signaling pathway GO:0007186
A series of molecular signals that proceeds with an activated receptor promoting 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, or for basal GPCR signaling the pathway begins with the receptor activating its G protein in the absence of an agonist, and ends with regulation of a downstream cellular process, e.g. transcription. The pathway can start from the plasma membrane, Golgi or nuclear membrane (PMID:24568158 and PMID:16902576).
7 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
G protein-coupled acetylcholine receptor signaling pathway GO:0007213
Any series of molecular signals initiated by an acetylcholine receptor on the surface of the target cell binding to one of its physiological ligands, and proceeding with the activated receptor promoting 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, e.g. transcription.
6 P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P10980 (/IDA) P16395 (/IDA)
Negative regulation of heart rate GO:0010459
Any process that stops, prevents or reduces the frequency or rate of heart contraction.
5 B3DKN8 (/IMP) Q1RM28 (/IMP) Q502R6 (/IMP) Q66IC1 (/IMP) Q801M4 (/IMP)
G protein-coupled receptor signaling pathway, coupled to cyclic nucleotide second messenger GO:0007187
The series of molecular signals generated as a consequence of a G protein-coupled receptor binding to its physiological ligand, where the pathway proceeds with activation or inhibition of a nucleotide cyclase activity and a subsequent change in the concentration of a cyclic nucleotide.
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Adenylate cyclase-modulating G protein-coupled receptor signaling pathway GO:0007188
The series of molecular signals generated as a consequence of a G protein-coupled receptor binding to its physiological ligand, where the pathway proceeds through activation or inhibition of adenylyl cyclase activity and a subsequent change in the concentration of cyclic AMP (cAMP).
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Phospholipase C-activating G protein-coupled acetylcholine receptor signaling pathway GO:0007207
The series of molecular signals generated as a consequence of a G protein-coupled acetylcholine receptor binding to its physiological ligand, where the pathway proceeds with activation of phospholipase C (PLC) and a subsequent release of inositol trisphosphate (IP3) and diacylglycerol (DAG).
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Nervous system development GO:0007399
The process whose specific outcome is the progression of nervous tissue over time, from its formation to its mature state.
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Regulation of heart contraction GO:0008016
Any process that modulates the frequency, rate or extent of heart contraction. Heart contraction is the process in which the heart decreases in volume in a characteristic way to propel blood through the body.
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Response to virus GO:0009615
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 stimulus from a virus.
4 P08172 (/IEP) P08172 (/IEP) P08172 (/IEP) P08172 (/IEP)
Membrane organization GO:0061024
A process which results in the assembly, arrangement of constituent parts, or disassembly of a membrane. A membrane is a double layer of lipid molecules that encloses all cells, and, in eukaryotes, many organelles; may be a single or double lipid bilayer; also includes associated proteins.
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Signal transduction GO:0007165
The cellular process in which a signal is conveyed to trigger a change in the activity or state of a cell. Signal transduction begins with reception of a signal (e.g. a ligand binding to a receptor or receptor activation by a stimulus such as light), or for signal transduction in the absence of ligand, signal-withdrawal or the activity of a constitutively active receptor. Signal transduction ends with regulation of a downstream cellular process, e.g. regulation of transcription or regulation of a metabolic process. Signal transduction covers signaling from receptors located on the surface of the cell and signaling via molecules located within the cell. For signaling between cells, signal transduction is restricted to events at and within the receiving cell.
3 P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
Cell surface receptor signaling pathway GO:0007166
A series of molecular signals initiated by activation of a receptor on the surface of a cell. The pathway begins with binding of an extracellular ligand to a cell surface receptor, or for receptors that signal in the absence of a ligand, by ligand-withdrawal or the activity of a constitutively active receptor. The pathway ends with regulation of a downstream cellular process, e.g. transcription.
3 P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
G protein-coupled acetylcholine receptor signaling pathway GO:0007213
Any series of molecular signals initiated by an acetylcholine receptor on the surface of the target cell binding to one of its physiological ligands, and proceeding with the activated receptor promoting 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, e.g. transcription.
3 P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
Adenylate cyclase-inhibiting G protein-coupled acetylcholine receptor signaling pathway GO:0007197
The series of molecular signals generated as a consequence of a G protein-coupled acetylcholine receptor binding to its physiological ligand, where the pathway proceeds with inhibition of adenylyl cyclase and a subsequent decrease in the concentration of cyclic AMP (cAMP).
2 P32211 (/IDA) P32211 (/IDA)
Regulation of smooth muscle contraction GO:0006940
Any process that modulates the frequency, rate or extent of smooth muscle contraction.
1 P10980 (/IDA)
Negative regulation of adenylate cyclase activity GO:0007194
Any process that stops, prevents, or reduces the frequency, rate or extent of adenylate cyclase activity.
1 P17200 (/NAS)
Phospholipase C-activating G protein-coupled receptor signaling pathway GO:0007200
The series of molecular signals generated as a consequence of a G protein-coupled receptor binding to its physiological ligand, where the pathway proceeds with activation of phospholipase C (PLC) and a subsequent increase in the concentration of inositol trisphosphate (IP3) and diacylglycerol (DAG).
1 P16395 (/IDA)
G protein-coupled acetylcholine receptor signaling pathway GO:0007213
Any series of molecular signals initiated by an acetylcholine receptor on the surface of the target cell binding to one of its physiological ligands, and proceeding with the activated receptor promoting 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, e.g. transcription.
1 Q9ERZ4 (/IMP)
G protein-coupled acetylcholine receptor signaling pathway GO:0007213
Any series of molecular signals initiated by an acetylcholine receptor on the surface of the target cell binding to one of its physiological ligands, and proceeding with the activated receptor promoting 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, e.g. transcription.
1 Q9ERZ4 (/ISO)
Response to organic substance GO:0010033
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 an organic substance stimulus.
1 P08485 (/IEP)
Phosphatidylinositol metabolic process GO:0046488
The chemical reactions and pathways involving phosphatidylinositol, any glycophospholipid in which a sn-glycerol 3-phosphate residue is esterified to the 1-hydroxyl group of 1D-myo-inositol.
1 P17200 (/NAS)
Regulation of synaptic vesicle exocytosis GO:2000300
Any process that modulates the frequency, rate or extent of synaptic vesicle exocytosis.
1 Q9ERZ4 (/EXP)
Regulation of synaptic vesicle exocytosis GO:2000300
Any process that modulates the frequency, rate or extent of synaptic vesicle exocytosis.
1 Q9ERZ4 (/IMP)

There are 35 GO terms relating to "cellular component"

The search results have been sorted with the annotations that are found most frequently at the top of the list. The results can be filtered by typing text into the search box at the top of the table.
GO Term Annotations Evidence
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
8 P06199 (/ISS) P10980 (/ISS) P30372 (/ISS) P41985 (/ISS) P41985 (/ISS) Q9ERZ4 (/ISS) Q9N2A7 (/ISS) Q9N2A7 (/ISS)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
7 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
7 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08173 (/TAS) P08173 (/TAS) P08173 (/TAS)
Glutamatergic synapse GO:0098978
A synapse that uses glutamate as a neurotransmitter.
7 G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA) P08485 (/IDA) P10980 (/IDA)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
5 P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P10980 (/IDA)
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
5 P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P16395 (/IDA)
Integral component of presynaptic active zone membrane GO:0099059
The component of the presynaptic active zone membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
5 G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA) G7MML6 (/IDA)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
4 P08485 (/IDA) P10980 (/IDA) P32211 (/IDA) P32211 (/IDA)
Integral component of membrane GO:0016021
The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
4 P08172 (/IDA) P08172 (/IDA) P08172 (/IDA) P08172 (/IDA)
Clathrin-coated vesicle membrane GO:0030665
The lipid bilayer surrounding a clathrin-coated vesicle.
4 P08172 (/TAS) P08172 (/TAS) P08172 (/TAS) P08172 (/TAS)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
2 P32211 (/ISO) P32211 (/ISO)
Postsynaptic density GO:0014069
An electron dense network of proteins within and adjacent to the postsynaptic membrane of an asymmetric, neuron-neuron synapse. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
2 P32211 (/ISO) P32211 (/ISO)
Membrane GO:0016020
A lipid bilayer along with all the proteins and protein complexes embedded in it an attached to it.
2 P32211 (/ISO) P32211 (/ISO)
Asymmetric synapse GO:0032279
A type of synapse occurring between an axon and a dendritic spine or dendritic shaft. Asymmetric synapses, the most abundant synapse type in the central nervous system, involve axons that contain predominantly spherical vesicles and contain a thickened postsynaptic density. Most or all synapses of this type are excitatory.
2 P08485 (/IDA) P10980 (/IDA)
Asymmetric synapse GO:0032279
A type of synapse occurring between an axon and a dendritic spine or dendritic shaft. Asymmetric synapses, the most abundant synapse type in the central nervous system, involve axons that contain predominantly spherical vesicles and contain a thickened postsynaptic density. Most or all synapses of this type are excitatory.
2 P32211 (/ISO) P32211 (/ISO)
Neuronal cell body GO:0043025
The portion of a neuron that includes the nucleus, but excludes cell projections such as axons and dendrites.
2 P08485 (/IDA) P10980 (/IDA)
Neuronal cell body GO:0043025
The portion of a neuron that includes the nucleus, but excludes cell projections such as axons and dendrites.
2 P32211 (/ISO) P32211 (/ISO)
Axon terminus GO:0043679
Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal button is a specialized region of it.
2 P08485 (/IDA) P10980 (/IDA)
Axon terminus GO:0043679
Terminal inflated portion of the axon, containing the specialized apparatus necessary to release neurotransmitters. The axon terminus is considered to be the whole region of thickening and the terminal button is a specialized region of it.
2 P32211 (/ISO) P32211 (/ISO)
Glutamatergic synapse GO:0098978
A synapse that uses glutamate as a neurotransmitter.
2 P32211 (/ISO) P32211 (/ISO)
Integral component of presynaptic membrane GO:0099056
The component of the presynaptic membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
2 P08485 (/IDA) P10980 (/IDA)
Integral component of presynaptic membrane GO:0099056
The component of the presynaptic membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
2 P32211 (/ISO) P32211 (/ISO)
Integral component of postsynaptic density membrane GO:0099061
The component of the postsynaptic density membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
2 P32211 (/ISO) P32211 (/ISO)
Cytoplasm GO:0005737
All of the contents of a cell excluding the plasma membrane and nucleus, but including other subcellular structures.
1 P08485 (/IDA)
Plasma membrane GO:0005886
The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins.
1 Q9ERZ4 (/ISO)
Integral component of plasma membrane GO:0005887
The component of the plasma membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 Q9ERZ4 (/ISO)
Postsynaptic density GO:0014069
An electron dense network of proteins within and adjacent to the postsynaptic membrane of an asymmetric, neuron-neuron synapse. Its major components include neurotransmitter receptors and the proteins that spatially and functionally organize them such as anchoring and scaffolding molecules, signaling enzymes and cytoskeletal components.
1 P08485 (/IDA)
Integral component of membrane GO:0016021
The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 Q9ERZ4 (/ISO)
Integral component of membrane GO:0016021
The component of a membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 P16395 (/ISS)
Dendrite GO:0030425
A neuron projection that has a short, tapering, morphology. Dendrites receive and integrate signals from other neurons or from sensory stimuli, and conduct nerve impulses towards the axon or the cell body. In most neurons, the impulse is conveyed from dendrites to axon via the cell body, but in some types of unipolar neuron, the impulse does not travel via the cell body.
1 P10980 (/IDA)
Symmetric synapse GO:0032280
A synapse that lacks an electron dense postsynaptic specialization. In vertebtrates, these occur primarily on dendrite shafts and neuronal cell bodies and involve persynapses containing clusters of predominantly flattened or elongated vesicles and are typcially inhibitory.
1 P10980 (/IDA)
Cholinergic synapse GO:0098981
A synapse that uses acetylcholine as a neurotransmitter.
1 Q9ERZ4 (/EXP)
Cholinergic synapse GO:0098981
A synapse that uses acetylcholine as a neurotransmitter.
1 Q9ERZ4 (/IMP)
Integral component of postsynaptic membrane GO:0099055
The component of the postsynaptic membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 P10980 (/IDA)
Integral component of postsynaptic density membrane GO:0099061
The component of the postsynaptic density membrane consisting of the gene products and protein complexes having at least some part of their peptide sequence embedded in the hydrophobic region of the membrane.
1 P08485 (/IDA)