K2P4.1 (also named TWIK-related arachidonic acid stimulated K+ channel, TRAAK or KCNK4) is a member of the 2-pore (2P) domain K+ channels family that at the moment includes 15 members. These channels show little time or voltage dependence and are considered to be “leaky” or “background” K+ channels, thereby generating background currents which help set the membrane resting potential and cell excitation. The K2P channels have a signature topology that includes four transmembrane domains and two pore domains with intracellular N- and C- termini.
Background References
1. Brohawn S G et al. Crystal structure of the human K2P TRAAK, a lipid- and mechano-sensitive K+ ion channel. Science 335:436-441 (2012).
2. Brohawn S G et al. Physical mechanism for gating and mechanosensitivity of the human TRAAK K+ channel. Nature 516:126-130 (2014).
Sequence Similarity
Belongs to the two pore domain potassium channel (TC 1.A.1.8) family.
Western blot analysis of KCNK4 / K2P4.1 on different lysates with Rabbit anti-KCNK4 / K2P4.1 antibody (ER1803-07) at 1/2,000 dilution.
Lane 1: Mouse colon tissue lysate Lane 2: Mouse brain tissue lysate Lane 3: Rat colon tissue lysate Lane 4: Rat brain tissue lysate
Lysates/proteins at 40 µg/Lane.
Predicted band size: 43 kDa Observed band size: 50 kDa
Exposure time: 10 seconds; ECL: K1801;
4-20% SDS-PAGE gel.
Proteins were transferred to a PVDF membrane and blocked with 5% NFDM/TBST for 1 hour at room temperature. The primary antibody (ER1803-07) at 1/2,000 dilution was used in 5% NFDM/TBST at 4℃ overnight. Goat Anti-Rabbit IgG - HRP Secondary Antibody (HA1001) at 1/50,000 dilution was used for 1 hour at room temperature.
Immunohistochemical analysis of paraffin-embedded rat large intestine tissue using anti-K2P4.1 antibody. Counter stained with hematoxylin.
Immunohistochemical analysis of paraffin-embedded mouse colon tissue using anti-K2P4.1 antibody. Counter stained with hematoxylin.
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