G protein-activated inward rectifier potassium channel 1 (GIRK-1) is encoded in the human by the gene KCNJ3.[5]
Potassium channels are present in most mammalian cells, where they participate in a wide range of physiologic responses. The protein encoded by this gene is an integral membrane protein and inward-rectifier type potassium channel. The encoded protein, which has a greater tendency to allow potassium to flow into a cell rather than out of a cell, is controlled by G-proteins and plays an important role in regulating heartbeat. It associates with three other G-protein-activated potassium channels to form a hetero-tetrameric pore-forming complex.[5]
KCNJ3 has been shown to interact with KCNJ5.[6][7]
This article incorporates text from the United States National Library of Medicine, which is in the public domain.
PDB gallery
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1n9p: Crystal Structure of the Cytoplasmic Domain of G-protein Activated Inward Rectifier Potassium Channel 1
1u4e: Crystal Structure of Cytoplasmic Domains of GIRK1 channel
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see also disorders |
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