Tissue Specificity | Abundantly expressed in heart, pancreas, prostate, kidney, small intestine and peripheral blood leukocytes. Less abundant in placenta, lung, spleen, colon, thymus, testis and ovaries. |
Subcellular location [CC] | Cell membrane {ECO:0000269|PubMed:10646604, ECO:0000269|PubMed:18165683, ECO:0000269|PubMed:21228319, ECO:0000269|PubMed:22024150, ECO:0000269|PubMed:25037568}; Multi-pass membrane protein {ECO:0000269|PubMed:18165683}. Cytoplasmic vesicle membrane {ECO:0000269|PubMed:18165683, ECO:0000269|PubMed:23529131}. Early endosome {ECO:0000269|PubMed:23529131}. Membrane raft {ECO:0000269|PubMed:20533308, ECO:0000269|PubMed:24855057}. Endoplasmic reticulum {ECO:0000269|PubMed:21228319, ECO:0000269|PubMed:24855057}. Basolateral cell membrane {ECO:0000269|PubMed:21228319}. Note=Colocalized with KCNE3 at the plasma membrane (PubMed:10646604). Upon 17beta-oestradiol treatment, colocalizes with RAB5A at early endosome (PubMed:23529131). Heterotetramer with KCNQ5 is highly retained at the endoplasmic reticulum and is localized outside of lipid raft microdomains (PubMed:24855057). During the early stages of epithelial cell polarization induced by the calcium switch, it is removed from the plasma membrane to the endoplasmic reticulum, where it is retained, and redistributed to the basolateral cell surface in a PI3K-dependent manner at a later stage (PubMed:21228319). {ECO:0000269|PubMed:10646604, ECO:0000269|PubMed:21228319, ECO:0000269|PubMed:23529131, ECO:0000269|PubMed:24855057}. |