Page last updated: 2024-10-24
voltage-gated monoatomic cation channel activity
Definition
Target type: molecularfunction
Enables the transmembrane transfer of a cation by a voltage-gated channel. A cation is a positively charged ion. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded. [GOC:mtg_transport, ISBN:0815340729]
Voltage-gated monoatomic cation channel activity is a molecular function that describes the ability of a protein to act as a channel through a cell membrane, selectively allowing the passage of single-atom cations, such as sodium (Na+), potassium (K+), calcium (Ca2+), or hydrogen (H+) ions. These channels are integral membrane proteins that undergo conformational changes in response to changes in the membrane potential.
When the membrane potential reaches a certain threshold, the channel opens, allowing ions to flow across the membrane down their electrochemical gradient. This flow of ions can alter the membrane potential, triggering a variety of cellular processes, including nerve impulses, muscle contraction, and hormone secretion.
The selectivity of the channel is determined by the structure of the pore region, which is lined with amino acid residues that interact with the hydrated ions. The gating of the channel is regulated by a variety of mechanisms, including voltage sensing domains, ligand binding sites, and phosphorylation events.
Voltage-gated monoatomic cation channels play a crucial role in a wide range of physiological processes, including:
* **Nerve impulse propagation:** Voltage-gated sodium and potassium channels are essential for the generation and propagation of action potentials in neurons.
* **Muscle contraction:** Voltage-gated calcium channels are responsible for triggering the release of calcium from intracellular stores, which initiates muscle contraction.
* **Hormone secretion:** Voltage-gated calcium channels are also involved in the secretion of hormones from endocrine cells.
* **Cellular signaling:** Voltage-gated sodium and potassium channels are involved in a variety of cellular signaling pathways.
Mutations in genes encoding voltage-gated monoatomic cation channels can lead to a variety of human diseases, including epilepsy, cardiac arrhythmias, and muscle disorders.'
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Proteins (2)
| Protein | Definition | Taxonomy |
|---|---|---|
| Voltage-dependent R-type calcium channel subunit alpha-1E | A voltage-dependent R-type calcium channel subunit alpha-1E that is encoded in the genome of human. [PRO:WCB, UniProtKB:Q15878] | Homo sapiens (human) |
| Glutamate receptor ionotropic, NMDA 2D | A glutamate receptor ionotropic, NMDA 2D that is encoded in the genome of human. [PRO:DNx, UniProtKB:O15399] | Homo sapiens (human) |
Compounds (48)
| Compound | Definition | Classes | Roles |
|---|---|---|---|
| alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid | alpha-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic Acid: An IBOTENIC ACID homolog and glutamate agonist. The compound is the defining agonist for the AMPA subtype of glutamate receptors (RECEPTORS, AMPA). It has been used as a radionuclide imaging agent but is more commonly used as an experimental tool in cell biological studies. | non-proteinogenic alpha-amino acid | |
| 6,7-dichloroquinoxaline-2,3-dione | quinoxaline derivative | ||
| tacrine | tacrine : A member of the class of acridines that is 1,2,3,4-tetrahydroacridine substituted by an amino group at position 9. It is used in the treatment of Alzheimer's disease. Tacrine: A cholinesterase inhibitor that crosses the blood-brain barrier. Tacrine has been used to counter the effects of muscle relaxants, as a respiratory stimulant, and in the treatment of Alzheimer's disease and other central nervous system disorders. | acridines; aromatic amine | EC 3.1.1.7 (acetylcholinesterase) inhibitor |
| amantadine | amant: an antiviral compound consisting of an adamantane derivative chemically linked to a water-solube polyanioic matrix; structure in first source | adamantanes; primary aliphatic amine | analgesic; antiparkinson drug; antiviral drug; dopaminergic agent; NMDA receptor antagonist; non-narcotic analgesic |
| arcaine | 1,4-diguanidinobutane : A guanidine derivative consisting of butane having guanidino groups at the 1- and 4-positions. arcaine: RN given refers to parent cpd; structure | guanidines | |
| chlorpromazine | chlorpromazine : A substituted phenothiazine in which the ring nitrogen at position 10 is attached to C-3 of an N,N-dimethylpropanamine moiety. Chlorpromazine: The prototypical phenothiazine antipsychotic drug. Like the other drugs in this class chlorpromazine's antipsychotic actions are thought to be due to long-term adaptation by the brain to blocking DOPAMINE RECEPTORS. Chlorpromazine has several other actions and therapeutic uses, including as an antiemetic and in the treatment of intractable hiccup. | organochlorine compound; phenothiazines; tertiary amine | anticoronaviral agent; antiemetic; dopaminergic antagonist; EC 3.4.21.26 (prolyl oligopeptidase) inhibitor; phenothiazine antipsychotic drug |
| clofibric acid | clofibric acid : A monocarboxylic acid that is isobutyric acid substituted at position 2 by a p-chlorophenoxy group. It is a metabolite of the drug clofibrate. Clofibric Acid: An antilipemic agent that is the biologically active metabolite of CLOFIBRATE. | aromatic ether; monocarboxylic acid; monochlorobenzenes | anticholesteremic drug; antilipemic drug; antineoplastic agent; herbicide; marine xenobiotic metabolite; PPARalpha agonist |
| racemethorphan | 6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene : An organic heterotetracyclic compound that is 1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene which is substituted by a methoxy group at position 6 and a methyl group at position 11. | aromatic ether; morphinane alkaloid; morphinane-like compound; organic heterotetracyclic compound | |
| ifenprodil | ifenprodil: NMDA receptor antagonist | piperidines | |
| ketamine | ketamine : A member of the class of cyclohexanones in which one of the hydrogens at position 2 is substituted by a 2-chlorophenyl group, while the other is substituted by a methylamino group. Ketamine: A cyclohexanone derivative used for induction of anesthesia. Its mechanism of action is not well understood, but ketamine can block NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE) and may interact with sigma receptors. | cyclohexanones; monochlorobenzenes; secondary amino compound | analgesic; environmental contaminant; intravenous anaesthetic; neurotoxin; NMDA receptor antagonist; xenobiotic |
| kynurenic acid | kynurenic acid : A quinolinemonocarboxylic acid that is quinoline-2-carboxylic acid substituted by a hydroxy group at C-4. Kynurenic Acid: A broad-spectrum excitatory amino acid antagonist used as a research tool. | monohydroxyquinoline; quinolinemonocarboxylic acid | G-protein-coupled receptor agonist; human metabolite; neuroprotective agent; nicotinic antagonist; NMDA receptor antagonist; Saccharomyces cerevisiae metabolite |
| memantine | adamantanes; primary aliphatic amine | antidepressant; antiparkinson drug; dopaminergic agent; neuroprotective agent; NMDA receptor antagonist | |
| nimodipine | nimodipine : A dihydropyridine that is 1,4-dihydropyridine which is substituted by methyl groups at positions 2 and 6, a (2-methoxyethoxy)carbonyl group at position 3, a m-nitrophenyl group at position 4, and an isopropoxycarbonyl group at position 5. An L-type calcium channel blocker, it acts particularly on cerebral circulation, and is used both orally and intravenously for the prevention and treatment of subarachnoid hemorrhage from ruptured intracranial aneurysm. Nimodipine: A calcium channel blockader with preferential cerebrovascular activity. It has marked cerebrovascular dilating effects and lowers blood pressure. | 2-methoxyethyl ester; C-nitro compound; dicarboxylic acids and O-substituted derivatives; diester; dihydropyridine; isopropyl ester | antihypertensive agent; calcium channel blocker; cardiovascular drug; vasodilator agent |
| orphenadrine | orphenadrine : A tertiary amino compound which is the phenyl-o-tolylmethyl ether of 2-(dimethylamino)ethanol. Orphenadrine: A muscarinic antagonist used to treat drug-induced parkinsonism and to relieve pain from muscle spasm. | ether; tertiary amino compound | antidyskinesia agent; antiparkinson drug; H1-receptor antagonist; muscarinic antagonist; muscle relaxant; NMDA receptor antagonist; parasympatholytic |
| procyclidine | procyclidine : A tertiary alcohol that consists of propan-1-ol substituted by a cyclohexyl and a phenyl group at position 1 and a pyrrolidin-1-yl group at position 3. Procyclidine: A muscarinic antagonist that crosses the blood-brain barrier and is used in the treatment of drug-induced extrapyramidal disorders and in parkinsonism. | pyrrolidines; tertiary alcohol | antidyskinesia agent; antiparkinson drug; muscarinic antagonist |
| phencyclidine | phencyclidine : A member of the class of piperidines that is piperidine in which the nitrogen is substituted with a 1-phenylcyclohexyl group. Formerly used as an anaesthetic agent, it exhibits both hallucinogenic and neurotoxic effects. Phencyclidine: A hallucinogen formerly used as a veterinary anesthetic, and briefly as a general anesthetic for humans. Phencyclidine is similar to KETAMINE in structure and in many of its effects. Like ketamine, it can produce a dissociative state. It exerts its pharmacological action through inhibition of NMDA receptors (RECEPTORS, N-METHYL-D-ASPARTATE). As a drug of abuse, it is known as PCP and Angel Dust. | benzenes; piperidines | anaesthetic; neurotoxin; NMDA receptor antagonist; psychotropic drug |
| 2,3-dihydroxyquinoxaline | 2,3-dihydroxyquinoxaline: fluorescent oxalic acid deriv. | ||
| glutamic acid | glutamic acid : An alpha-amino acid that is glutaric acid bearing a single amino substituent at position 2. Glutamic Acid: A non-essential amino acid naturally occurring in the L-form. Glutamic acid is the most common excitatory neurotransmitter in the CENTRAL NERVOUS SYSTEM. | glutamic acid; glutamine family amino acid; L-alpha-amino acid; proteinogenic amino acid | Escherichia coli metabolite; ferroptosis inducer; micronutrient; mouse metabolite; neurotransmitter; nutraceutical |
| bezafibrate | aromatic ether; monocarboxylic acid; monocarboxylic acid amide; monochlorobenzenes | antilipemic drug; environmental contaminant; geroprotector; xenobiotic | |
| fenofibric acid | fenofibric acid : A monocarboxylic acid that is 2-methylpropanoic acid substituted by a 4-(4-chlorobenzoyl)phenoxy group at position 2. It is a metabolite of the drug fenofibrate. fenofibric acid: RN given refers to parent cpd without isomeric designation; structure | aromatic ketone; chlorobenzophenone; monocarboxylic acid | drug metabolite; marine xenobiotic metabolite |
| budipine | budipine: RN given refers to parent cpd; structure in Negwer, 5th ed, #6541 | diarylmethane | |
| rosiglitazone | aminopyridine; thiazolidinediones | EC 6.2.1.3 (long-chain-fatty-acid--CoA ligase) inhibitor; ferroptosis inhibitor; insulin-sensitizing drug | |
| 6,7-dichloroquinoxaline-2,3-dione | |||
| pregnenolone sulfate | pregnenolone sulfate: RN given refers to (3 beta)-isomer | steroid sulfate | EC 2.7.1.33 (pantothenate kinase) inhibitor; human metabolite |
| ly 293558 | tezampanel: structure given in first source; an AMPA receptor antagonist | ||
| besonprodil | besonprodil: CI-1041 is also known as PD19680; NMDA receptor antagonist for treatment of Parkinson's disease; structure in first source | ||
| dizocilpine | secondary amino compound; tetracyclic antidepressant | anaesthetic; anticonvulsant; neuroprotective agent; nicotinic antagonist; NMDA receptor antagonist | |
| cns 5161 | CNS 5161: structure in first source | ||
| cp 101,606 | traxoprodil mesylate: a selective NMDA antagonist; structure given in first source | ||
| 7-chloro-thiokynurenate | 7-chlorothiokynurenic acid: glycine site antagonist of NMDA receptor | ||
| (3-chlorophenyl)(6,7-dimethoxy-1-((4-methoxyphenoxy)methyl)-3,4-dihydroisoquinolin-2(1h)-yl)methanone | (3-chlorophenyl)(6,7-dimethoxy-1-((4-methoxyphenoxy)methyl)-3,4-dihydroisoquinolin-2(1H)-yl)methanone: a positive modulator of GluN2C/GluN2D subunit-selective NMDA receptor | ||
| 4-(5-(4-bromophenyl)-3-(6-methyl-2-oxo-4-phenyl-1,2-dihydroquinolin-3-yl)-4,5-dihydro-1h-pyrazol-1-yl)-4-oxobutanoic acid | 4-(5-(4-bromophenyl)-3-(6-methyl-2-oxo-4-phenyl-1,2-dihydroquinolin-3-yl)-4,5-dihydro-1H-pyrazol-1-yl)-4-oxobutanoic acid: structure in first source | ||
| tcn 201 | |||
| l 745870 | 3-((4-(4-chlorophenyl)piperazin-1-yl)methyl)-1H-pyrrolo(2,3-b)pyridine: selective for D(4) receptors; structure in first source | piperazines | |
| levorphanol | Levorphanol: A narcotic analgesic that may be habit-forming. It is nearly as effective orally as by injection. | morphinane alkaloid | |
| dextromethorphan | dextromethorphan : A 6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene in which the sterocenters at positions 4a, 10 and 10a have S-configuration. It is a prodrug of dextrorphan and used as an antitussive drug for suppressing cough. Dextromethorphan: Methyl analog of DEXTRORPHAN that shows high affinity binding to several regions of the brain, including the medullary cough center. This compound is an NMDA receptor antagonist (RECEPTORS, N-METHYL-D-ASPARTATE) and acts as a non-competitive channel blocker. It is one of the widely used ANTITUSSIVES, and is also used to study the involvement of glutamate receptors in neurotoxicity. | 6-methoxy-11-methyl-1,3,4,9,10,10a-hexahydro-2H-10,4a-(epiminoethano)phenanthrene | antitussive; environmental contaminant; neurotoxin; NMDA receptor antagonist; oneirogen; prodrug; xenobiotic |
| dextrorphan | Dextrorphan: Dextro form of levorphanol. It acts as a noncompetitive NMDA receptor antagonist, among other effects, and has been proposed as a neuroprotective agent. It is also a metabolite of DEXTROMETHORPHAN. | morphinane alkaloid | |
| licostinel | licostinel: a glycine site NMDA receptor antagonist; structure given in first source | ||
| ro 25-6981 | Ro 25-6981 : A member of the class of piperidines that is 4-benzylpiperidine substituted by a 3-hydroxy-3-(4-hydroxyphenyl)-2-methylpropyl group at position 1 (the 1R,2S-stereoisomer). It is a potent antagonist of the GluN2B subunit of the N-methyl-D-aspartate (NMDA) receptor. Ro 25-6981: blocks NMDA receptors containg NR2B subunit; structure in first source | benzenes; phenols; piperidines; secondary alcohol; tertiary amino compound | anticonvulsant; antidepressant; neuroprotective agent; NMDA receptor antagonist |
| eaa-090 | EAA-090: a potent N-methyl-D-aspartate antagonist; structure in first source | dialkylarylamine; tertiary amino compound | |
| pd 174494 | PD 174494: structure in first source | piperidines | |
| ith 4012 | |||
| fpl 15896ar | |||
| (4-benzylpiperidin-1-yl)-(6-hydroxy-1h-indol-2-yl)methanone | (4-benzylpiperidin-1-yl)-(6-hydroxy-1H-indol-2-yl)methanone: an NR2B-subunit selective antagonist; structure in first source | ||
| tqx 173 | |||
| (1rs,1's)-peaqx | |||
| gw 9578 | GW 9578: a peroxisome proliferator-activated receptor alpha agonist; structure in first source | ||
| nitd 609 | NITD 609: an antimalarial and coccidiostat; structure in first source |