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Potassium channels are a group of ubiquitously expressed proteins that serve numerous functions in excitable and non-excitable cells. One class of integral membrane potassium channels is the large conductance, calcium-activated potassium channel (Maxi K+). Maxi K+ differs from most other potassium channels in that its activation is controlled by both increases in intracellular calcium and by membrane depolarization. Maxi K+ dual activation is possible because of its structure. The core of the channel, which is similar to other potassium channels, is a Maxi K+ alpha homotetramer that contains both a voltage sensor and an intracellular calcium binding domain. In vascular smooth muscle, an auxiliary beta-subunit is found in a 1:1 stoichiometry. The beta-subunit exhibits its effect on the Maxi K+ channel by effectively decreasing by 5- to 10- fold the concentration of calcium required to keep the pore open.
仅用于科研。不用于诊断过程。未经明确授权不得转售。
蛋白别名: BK channel; BK channel alpha subunit; BKCA alpha; calcium-activated potassium channel alpha subunit; Calcium-activated potassium channel subunit alpha-1; Calcium-activated potassium channel, subfamily M subunit alpha-1; K(VCA)alpha; KCa1.1; Maxi K channel; MaxiK; mSlo1; potassium large conductance calcium-activated channel, subfamily M, alpha member 1; Slo homolog; Slo-alpha; Slo1; Slowpoke homolog
基因别名: 5730414M22Rik; BKCa; Kcnma; Kcnma1; KCNMA1b; KCNMA1c; MaxiK; mSlo; mSlo1; Slo; Slo1
UniProt ID: (Mouse) Q08460, (Rat) Q62976
Entrez Gene ID: (Mouse) 16531, (Rat) 83731