The KTN1 Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal population with disrupted KTN1 gene in the HT29 human colorectal adenocarcinoma cell line. This polyclonal pool, derived from bulk gene editing without clonal isolation, offers a heterogeneous knockout model suitable for functional screening and phenotypic analyses. By avoiding clonal selection, the population reflects the range of editing outcomes inherent to CRISPR/Cas9, enabling robust and reproducible studies of KTN1-dependent processes.
The HT29 cell line, established from a primary colorectal adenocarcinoma of a 44-year-old female, is a widely used intestinal epithelial model in cancer research and drug screening. These adherent cells retain key characteristics of colorectal carcinoma, including dysregulated signaling pathways and tumorigenic potential, making them ideal for dissecting molecular mechanisms in colorectal cancer. Their well-characterized biology supports precise interpretation of gene knockout phenotypes.
KTN1 (Kinectin 1) is an ER membrane protein that scaffolds kinesin-1 (KIF5B) motors to drive ER tubule elongation and microtubule-dependent organelle transport. It interacts with ER-shaping proteins REEP3 and REEP4, contributing to ER network organization and dynamics. The KTN1-KIF5B complex links ER morphology to intracellular trafficking, with downstream effects on ER tubule formation, organelle distribution, and microtubule network stability. While upstream regulatory factors remain unknown, KTN1 is a central node at the ER-microtubule interface.
In HT29 cells, KTN1 loss disrupts ER integrity and intracellular trafficking, processes vital for protein secretion, lipid metabolism, and oncogenic stress management. This disruption potentially sensitizes cells to ER stress and alters organelle positioning, which may impact proliferation and drug responses. Given the role of microtubule-based transport in mitosis and signaling, KTN1 deficiency could further affect cell cycle progression and genomic stability, providing a relevant colorectal cancer model for studying ER-organelle crosstalk.
This polyclonal knockout model supports diverse assays such as immunofluorescence and live-cell imaging of ER dynamics, western blotting for ER stress markers, and qPCR analysis. Applications include screening for ER stress modulators, evaluating drug sensitivity via cell viability assays, and investigating microtubule-dependent processes by flow cytometry. It is also valuable for probing KTN1 interactions with KIF5B, REEP3, and REEP4 in colorectal cancer biology. For additional information, contact Ascent Research.
