KCNK1 Knockout Jurkat Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal population of Jurkat cells featuring targeted disruption of the KCNK1 gene. As a heterogeneous knockout pool free of clonal selection biases, this product provides a physiologically relevant loss-of-function model for investigating the TWIK-1 background potassium channel.
Jurkat cells are a widely used human T lymphoblastoid cell line derived from an acute T-cell leukemia patient. They serve as a canonical model for T-cell receptor signaling, activation, apoptosis, and leukemogenesis. Their lymphoid lineage and robust responsiveness to external stimuli make them particularly suitable for exploring how ion channels modulate lymphocyte function.
The KCNK1 gene encodes TWIK-1, a member of the two-pore domain potassium channel family that mediates leak currents essential for maintaining the resting membrane potential and controlling cell volume. In T lymphocytes, TWIK-1 channel activity is modulated by diverse upstream signals including G protein-coupled receptors, protein kinase A, hypoxia, mechanical stretch, and phospholipase C. Disruption of KCNK1 results in membrane depolarization, which in turn alters calcium influx and downstream signaling cascades such as the MAPK/ERK pathway and NFAT activation. TWIK-1 also functionally interacts with related channels KCNK2 (TREK-1) and KCNK4 (TRAAK), as well as the regulatory proteins ??-arrestin and 14-3-3. Representative components of this signaling network include DAG, IP3, PKC, calcineurin, and ERK, highlighting the channel??s integration into both early and late TCR signaling events.
Within the Jurkat T-cell context, KCNK1 plays a pivotal role in shaping calcium dynamics and downstream transcriptional programs that govern activation, proliferation, and apoptosis. Loss of TWIK-1-mediated background potassium conductance disrupts TCR-evoked calcium oscillations, attenuates ERK phosphorylation, and impairs NFAT translocation, thereby compromising normal T-cell effector functions. Moreover, altered KCNK1 function may affect cell volume homeostasis and apoptotic thresholds, making this knockout model a valuable tool for dissecting ion channel-dependent checkpoints in leukemic T-cell biology and for testing pharmacological modulators of potassium channels.
Typical applications encompass patch clamp electrophysiology to directly measure potassium currents, calcium imaging to monitor intracellular Ca2? dynamics, flow cytometric analysis of activation markers and apoptosis, and Western blotting for phosphorylated ERK and NFAT expression. Additional functional assays such as cell volume measurement, migration assays, and caspase activity profiling further broaden the experimental scope. This polyclonal KCNK1 knockout pool is ideally suited for research into T-cell signaling, apoptosis mechanisms, leukemia biology, ion channel pharmacology, and cancer immunotherapy. For more detailed information, please contact Ascent Research.
