HOOK2 Knockout HT29 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population designed to abolish HOOK2 function in HT29 colorectal adenocarcinoma cells. This product consists of a heterogeneous pool of HT29 cells bearing CRISPR/Cas9-mediated disruption of the HOOK2 locus, generated without single-cell cloning to retain population-level genetic diversity. It serves as a robust model for investigating HOOK2-dependent processes in intestinal epithelial biology and colorectal cancer, supporting functional genomics, drug screening, and mechanistic studies.
The HT29 parental line is a widely used human colorectal adenocarcinoma model with epithelial morphology, extensively applied in studies of intestinal epithelial biology, tumor progression, and therapeutic response. HT29 cells exhibit hallmark colorectal cancer features, including dysregulated signaling and autophagy dependency, making them a physiologically relevant host for examining genes such as HOOK2. Their stable growth and genetic tractability further facilitate the generation of polyclonal knockout pools suitable for diverse downstream assays. These attributes render HT29 an ideal system for dissecting HOOK2-mediated functions in colorectal cancer.
HOOK2 encodes a coiled-coil adaptor that tethers endosomal and lysosomal cargo to the dynein-dynactin motor complex, driving microtubule-based transport critical for endosomal trafficking, lysosomal positioning, and autophagosome-lysosome fusion. Downstream of TFEB and mTORC1, HOOK2 interacts with HOOK1, HOOK3, FTS, and Rab GTPases (Rab5, Rab7) to coordinate vesicle movement. It serves as an essential scaffold for dynein-dynactin recruitment, influencing perinuclear lysosome clustering and autophagosome maturation. HOOK2 also cooperates with the HOPS complex and LAMP1 to ensure efficient autophagic clearance. Through these interactions, HOOK2 integrates nutrient-sensing cues with organelle dynamics, thus regulating autophagy flux and cellular homeostasis.
In the context of HT29 colorectal cancer cells, HOOK2 disruption provides a powerful system to investigate how disrupted endolysosomal trafficking and autophagy drive tumor cell survival, proliferation, and drug resistance. Colorectal cancers often rewire autophagy to cope with metabolic stress and chemotherapy, with HOOK2-mediated lysosomal positioning central to these adaptive responses. Loss of HOOK2 enables assessment of autophagic flux, lysosome distribution, and chemosensitivity, clarifying how organelle transport influences colorectal cancer pathogenesis and uncovering potential therapeutic targets.
Key experimental applications include Western blot detection of autophagy markers (LC3, p62), immunofluorescence imaging of lysosomal positioning and LAMP1, and RT-qPCR profiling of autophagy gene expression. This polyclonal knockout pool is well-suited for co-immunoprecipitation analyses of the HOOK2-dynein interaction and for functional assays such as migration, invasion, and drug sensitivity testing. It is also compatible with flow cytometry-based autophagic flux measurements and lysosomal activity assays, expanding its utility across multiple readouts. Moreover, the model supports high-content screens for synthetic lethal interactions. For further information, please contact Ascent Research.
