EFCAB7 Knockout Raji Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed for targeted disruption of the EFCAB7 gene in the human Raji B lymphocyte cell line. This loss-of-function model enables investigation of EFCAB7-dependent calcium signaling mechanisms in a well-characterized lymphoid background. The polyclonal product provides a heterogeneous pool of knockout cells, reflecting diverse editing outcomes while maintaining the endogenous cellular context essential for physiologically relevant functional assays.
The Raji cell line, derived from an EBV-positive Burkitt??s lymphoma, is a widely utilized model for B lymphocyte biology, antigen presentation, and immune response studies. These lymphoblastoid cells harbor a characteristic MYC translocation and retain key features of mature B cells, including constitutive NF-??B activity and expression of surface immunoglobulins. Their robust growth and well-defined signal transduction networks make Raji cells an ideal host for dissecting calcium-dependent pathways in lymphocytes.
EFCAB7 encodes an EF-hand calcium-binding protein that functions as a presumed intracellular calcium sensor. Binding of calcium ions induces conformational changes enabling interactions with downstream effectors, thereby transducing signals from transient calcium elevations. Within the calcium signaling cascade, EFCAB7 is positioned downstream of phospholipase C?Ccoupled receptors and IP3 receptor?Cmediated endoplasmic reticulum calcium release. Upstream regulators include intracellular calcium concentration, calmodulin, and calcium channels such as IP3 receptors and ryanodine receptors. Downstream, the protein is thought to influence calmodulin-dependent kinases (CaMKs) and the calcineurin?CNFAT axis, ultimately modulating NFAT-mediated transcriptional programs. Although direct interacting factors remain uncharacterized, EFCAB7 likely interfaces with calcium-dependent adaptors or kinases to coordinate signal propagation.
In the Raji B cell context, disruption of EFCAB7 may compromise calcium-mediated signal transduction, potentially impairing NFAT activation and downstream gene expression. This knockout model provides a valuable tool for dissecting the molecular requirements of calcium-dependent transcription, proliferation, and effector functions in lymphocytes. Moreover, it enables the study of potential crosstalk between calcium signaling and pathways aberrantly activated in Burkitt??s lymphoma, such as MYC-driven proliferation and NF-??B signaling.
Typical research applications include calcium flux analyses using Fluo-4 imaging assays, western blotting for phospho-CaMK and calcineurin activation, RT-qPCR quantification of NFAT target genes, and NFAT-responsive luciferase reporter assays. This polyclonal knockout population is also suitable for co-immunoprecipitation experiments to identify EFCAB7 interactors under varying calcium conditions, as well as high-throughput drug screening for modulators of lymphocyte calcium signaling. For additional information, please contact Ascent Research.
