Purified Membrane Proteins

G protein-activated inward rectifier potassium channel 4 (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)

This potassium channel is controlled by G proteins. Inward rectifier potassium channels are characterized by a greater tendency to allow potassium to flow into the cell rather than out of it. Their voltage dependence is regulated by the concentration of extracellular potassium; as external potassium is raised, the voltage range of the channel opening shifts to more positive voltages. The inward rectification is mainly due to the blockage of outward current by internal magnesium. Can be blocked by external barium. {ECO:0000269|PubMed:22315453, ECO:0000269|PubMed:22628607, ECO:0000269|PubMed:24037882, ECO:0000269|PubMed:27099398, ECO:0000269|PubMed:27293068}.

Native

Stable

Pure

Active protein

Recombinant protein

Human Origin

Entry Name:

KCNJ5_HUMAN

Gene Name:

KCNJ5 GIRK4

Uniprot Accession:

P48544

Origin:

Homo sapiens (Human)

Protein family:

Inward rectifier-type potassium channel (TC 1.A.2.1) family, KCNJ5 subfamily

Full-length:

419

AA

Mass:

47668

Da

MAGDSRNAMNQDMEIGVTPWDPKKIPKQARDYVPIATDRTRLLAEGKKPRQRYMEKSGKCNVHHGNVQETYRYLSDLFTTLVDLKWRFNLLVFTMVYTVTWLFFGFIWWLIAYIRGDLDHVGDQEWIPCVENLSGFVSAFLFSIETETTIGYGFRVITEKCPEGIILLLVQAILGSIVNAFMVGCMFVKISQPKKRAETLMFSNNAVISMRDEKLCLMFRVGDLRNSHIVEASIRAKLIKSRQTKEGEFIPLNQTDINVGFDTGDDRLFLVSPLIISHEINQKSPFWEMSQAQLHQEEFEVVVILEGMVEATGMTCQARSSYMDTEVLWGHRFTPVLTLEKGFYEVDYNTFHDTYETNTPSCCAKELAEMKREGRLLQYLPSPPLLGGCAEAGLDAEAEQNEEDEPKGLGGSREARGSV

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Expression systems: bacteria, yeast, insect cells, HEK & CHO mammalian cells
Purified formats: detergents, SMALPs, nanodiscs, proteoliposomes