The ARFGAP1 Knockout HT29 Polyclonal Cells provide a CRISPR/Cas9-mediated gene-disrupted pool of HT29 colorectal adenocarcinoma epithelial cells. This polyclonal knockout population offers a robust loss-of-function system to investigate ARFGAP1-dependent cellular processes without the selective constraints of clonal isolation.
HT29 is a well-established human colorectal adenocarcinoma line isolated from a female patient. Under appropriate conditions, these cells can undergo enterocytic and goblet cell differentiation, making them a valuable model for studying epithelial barrier integrity, mucin secretion, and colorectal tumorigenesis.
ARFGAP1 functions as a GTPase-activating protein (GAP) for ADP-ribosylation factor 1 (ARF1). It promotes GTP hydrolysis on ARF1, driving COPI coat disassembly and enabling retrograde vesicle trafficking from the Golgi to the endoplasmic reticulum and between Golgi cisternae. ARFGAP1 activity is modulated by membrane curvature (via its ALPS motif), phosphoinositides, and protein kinase D (PKD)-mediated phosphorylation. It physically interacts with the coatomer (COPI) complex, clathrin adaptor AP-1, GGA proteins, ARF1, and the KDEL receptor, coordinating cargo sorting via p24 proteins and Golgi enzyme recycling. Through these interactions, ARFGAP1 integrates signals from lipid membranes and upstream kinases to maintain Golgi architecture and secretory pathway flux.
In the HT29 colorectal cancer background, disruption of ARFGAP1 is anticipated to impair retrograde trafficking, altering Golgi morphology, protein glycosylation, and secretion of mucins and other glycoproteins. This model enables dissection of ARFGAP1’s role in polarized epithelial function, cell migration, and invasion, with potential links to trafficking defects observed in colorectal cancer progression and neurodegenerative disorders.
Key applications include western blot confirmation of ARFGAP1 loss, immunofluorescence analysis of Golgi markers (e.g., GM130, giantin), RT-qPCR profiling of trafficking-related genes, Transwell migration/invasion assays, live-cell imaging of vesicle dynamics, and co-immunoprecipitation to assess COPI complex integrity. These polyclonal knockout cells are a versatile platform for studying COPI-dependent retrograde transport, ARF signaling, and the impact of trafficking perturbations on colorectal cancer cell behavior. For ordering and technical information, contact Ascent Research.
