The DTX3 Knockout HEK293T Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population featuring disruption of the human DTX3 gene. This product provides a heterogeneous loss-of-function model in the widely utilized HEK293T background, enabling systematic investigation of DTX3-dependent molecular mechanisms without the confounding effects of clonal selection. The polyclonal format captures the diversity of editing outcomes, offering a robust tool for functional genomics and pathway analysis.
The host cell line, HEK293T, is a derivative of human embryonic kidney epithelial cells that stably expresses the SV40 large T antigen. This modification permits high-level episomal amplification of transfected plasmids and enhances protein production, making these cells a preferred host for transient and stable expression studies, lentiviral/retroviral packaging, and a broad range of biochemical assays. Their epithelial origin and ease of manipulation render them particularly suitable for studying signaling networks relevant to development and disease.
DTX3 encodes an E3 ubiquitin ligase that negatively regulates the Notch signaling pathway. Upon engagement of Notch ligands such as DLL1 and JAG1, the NOTCH1 receptor undergoes proteolytic cleavage by ???secretase, releasing the Notch intracellular domain (NICD). NICD translocates to the nucleus, where it forms a transcriptional activation complex with RBPJ and MAML1, driving expression of target genes including HES1 and HEY1. DTX3 counteracts this activation by interacting with NICD and ubiquitin?conjugating enzymes, catalyzing ubiquitination and subsequent proteasomal degradation of NICD. It functions in concert with related ligases DTX1 and DTX2 to dampen Notch transcriptional output.
In the HEK293T context, loss of DTX3 is expected to perturb the normal attenuation of Notch signaling, thereby providing a defined cellular system to dissect the regulatory roles of this E3 ligase. The high transfection efficiency and robust growth characteristics of HEK293T cells facilitate detailed biochemical and functional analyses of DTX3?mediated ubiquitination, protein?interaction dynamics, and downstream gene expression changes. The polyclonal knockout population avoids artifacts associated with clonal isolates and captures a representative spectrum of editing events, making it a versatile tool for studying Notch?dependent processes.
This knockout model is ideally suited for a variety of research applications, including elucidation of Notch signaling regulation, investigation of ubiquitin ligase function, cancer biology studies where aberrant Notch activity plays a role, and drug target validation campaigns. Representative experimental approaches encompass Western blotting to assess NICD and target protein levels, RT?qPCR for HES1/HEY1 transcript quantification, Notch?responsive luciferase reporter assays, co?immunoprecipitation to probe DTX3?CNICD interactions, and ubiquitination assays to monitor NICD modification. For further information or to discuss custom applications, please contact Ascent Research.
