A G protein-activated inward rectifier potassium channel 4 that is encoded in the genome of human. [PRO:WCB, UniProtKB:P48544]
GIRK-4;
Cardiac inward rectifier;
CIR;
Heart KATP channel;
Inward rectifier K(+) channel Kir3.4;
IRK-4;
KATP-1;
Potassium channel, inwardly rectifying subfamily J member 5
| Timeframe | Studies on this Protein(%) | All Drugs % |
|---|---|---|
| pre-1990 | 0 (0.00) | 18.7374 |
| 1990's | 0 (0.00) | 18.2507 |
| 2000's | 0 (0.00) | 29.6817 |
| 2010's | 1 (100.00) | 24.3611 |
| 2020's | 0 (0.00) | 2.80 |
| Drug | Taxonomy | Measurement | Average (mM) | Bioassay(s) | Publication(s) |
|---|---|---|---|---|---|
| naringin | Homo sapiens (human) | EC50 | 100.0000 | 1 | 1 |
This protein enables 4 target(s):
| 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 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] |
This protein is located in 1 target(s):
| 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] |
This protein is active in 1 target(s):
| 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] |
This protein is part of 2 target(s):
| Target | Category | Definition |
|---|---|---|
| I(KACh) inward rectifier potassium channel complex | cellular component | An inward rectifier potassium channel complex expressed in cardiac muscle, specifically the sinoatrial node and atria, where it controls the heart rate, via regulation by G protein-coupled receptor signaling. In mammals it is composed of GIRK1 (or Kir3.1) and GIRK4 (or Kir3.4) subunits. [GOC:ame, PMID:9765280] |
| voltage-gated potassium channel complex | cellular component | A protein complex that forms a transmembrane channel through which potassium ions may cross a cell membrane in response to changes in membrane potential. [GOC:mah] |
This protein is involved in 8 target(s):
| 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] |
| 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] |
| 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] |