K+ voltage-gated channel subfamily E member 4; minK-related peptide 3; minimum K+ channel-related peptide 3; K+ channel subunit beta MiRP3 (KCNE4)
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Function
- ancillary protein that assembles as a beta subunit with a voltage-gated K+ channel complex of pore-forming alpha subunits
- modulates the gating kinetics & enhances stability of the channel complex
- may associate with KCNQ1/KVLTQ1 & inhibit K+ current
Structure
belongs to the K+ channel KCNE family
Compartment
- membrane; single-pass type 1 membrane protein
Expression
- predominantly expressed in embryo & adult uterus
- low expression found in kidney, small intestine, lung & heart