A G protein-activated inward rectifier potassium channel 1 that is encoded in the genome of human. [PRO:WCB, UniProtKB:P48549]
| Target | Category | Definition |
|---|
| protein binding | molecular function | Binding to a protein. [GOC:go_curators] |
| G-protein activated inward rectifier potassium channel activity | molecular function | Enables the transmembrane transfer of a potassium ion by an inwardly-rectifying voltage-gated channel, where the inward rectification is due to a voltage-dependent block of the channel pore by a G protein. An inwardly rectifying current-voltage relation is one where at any given driving force the inward flow of K+ ions exceeds the outward flow for the opposite driving force. [GOC:cb, GOC:mah] |
| voltage-gated potassium channel activity involved in atrial cardiac muscle cell action potential repolarization | molecular function | Enables the transmembrane transfer of a potassium ion by a voltage-gated channel through the plasma membrane of an atrial cardiomyocyte contributing to the repolarization phase of an action potential. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded. [GOC:BHF, GOC:mtg_cardiac_conduct_nov11] |
| voltage-gated monoatomic ion channel activity involved in regulation of presynaptic membrane potential | molecular function | Voltage-gated ion channel activity, occurring in the presynaptic membrane, involved in regulation of presynaptic membrane potential. This is a key step in synaptic transmission, following the arrival of an action potential at the synapse. [GOC:dos] |
| voltage-gated potassium channel activity involved in ventricular cardiac muscle cell action potential repolarization | molecular function | Enables the transmembrane transfer of a potassium ion by a voltage-gated channel through the plasma membrane of a ventricular cardiomyocyte contributing to the repolarization phase of an action potential. A voltage-gated channel is a channel whose open state is dependent on the voltage across the membrane in which it is embedded. [GOC:BHF, GOC:mtg_cardiac_conduct_nov11, GOC:rl, GOC:TermGenie, PMID:8528244] |
| Target | Category | Definition |
|---|
| plasma membrane | cellular component | The membrane surrounding a cell that separates the cell from its external environment. It consists of a phospholipid bilayer and associated proteins. [ISBN:0716731363] |
| external side of plasma membrane | cellular component | The leaflet of the plasma membrane that faces away from the cytoplasm and any proteins embedded or anchored in it or attached to its surface. [GOC:dos, GOC:tb] |
| T-tubule | cellular component | Invagination of the plasma membrane of a muscle cell that extends inward from the cell surface around each myofibril. The ends of T-tubules make contact with the sarcoplasmic reticulum membrane. [GOC:mtg_muscle, ISBN:0815316194] |
| presynaptic membrane | cellular component | A specialized area of membrane of the axon terminal that faces the plasma membrane of the neuron or muscle fiber with which the axon terminal establishes a synaptic junction; many synaptic junctions exhibit structural presynaptic characteristics, such as conical, electron-dense internal protrusions, that distinguish it from the remainder of the axon plasma membrane. [GOC:jl, ISBN:0815316194] |
| parallel fiber to Purkinje cell synapse | cellular component | An excitatory synapse formed by the parallel fibers of granule cells synapsing onto the dendrites of Purkinje cells. [PMID:16623829, PMID:3209740] |
| Target | Category | Definition |
|---|
| potassium ion transport | biological process | The directed movement of potassium ions (K+) into, out of or within a cell, or between cells, by means of some agent such as a transporter or pore. [GOC:ai] |
| response to electrical stimulus | biological process | 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 electrical stimulus. [GOC:ai] |
| potassium ion transmembrane transport | biological process | A process in which a potassium ion is transported from one side of a membrane to the other. [GOC:mah] |
| regulation of heart rate by cardiac conduction | biological process | A cardiac conduction process that modulates the frequency or rate of heart contraction. [GOC:BHF, GOC:mtg_cardiac_conduct_nov11] |
| membrane repolarization during atrial cardiac muscle cell action potential | biological process | The process in which ions are transported across a membrane such that the atrial cardiomyocyte membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential. [GOC:dph, GOC:mtg_cardiac_conduct_nov11, GOC:tb] |
| membrane repolarization during ventricular cardiac muscle cell action potential | biological process | The process in which ions are transported across a membrane such that the ventricular cardiomyocyte membrane potential changes in the direction from the positive membrane potential at the peak of the action potential towards the negative resting potential. [GOC:BHF, GOC:dph, GOC:mtg_cardiac_conduct_nov11, GOC:tb] |
| regulation of presynaptic membrane potential | biological process | Any process that modulates the potential difference across a presynaptic membrane. [GOC:dph, GOC:ef] |
| ventricular cardiac muscle cell membrane repolarization | biological process | The process in which ions are transported across the plasma membrane of a ventricular cardiac muscle cell such that the membrane potential changes in the repolarizing direction, toward the steady state potential. For example, the repolarization during an action potential is from a positive membrane potential towards a negative resting potential. [GOC:BHF, GOC:mtg_cardiac_conduct_nov11] |
| potassium ion import across plasma membrane | biological process | The directed movement of potassium ions from outside of a cell, across the plasma membrane and into the cytosol. [PMID:9139127] |
| regulation of monoatomic ion transmembrane transport | biological process | Any process that modulates the frequency, rate or extent of the directed movement of ions from one side of a membrane to the other. [GOC:mah] |