KCTD15 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population with targeted disruption of the KCTD15 gene in the HAP1 near-haploid human cell line. This loss-of-function model preserves allelic diversity inherent to polyclonal pools, offering a robust tool for functional genomics and high-throughput applications. The knockout enables dissection of KCTD15’s role in ubiquitin-mediated proteostasis and developmental signaling without the bias of clonal selection.
The HAP1 host line is derived from KBM-7 chronic myeloid leukemia cells and maintains a near-haploid karyotype with disomy only for chromosome 8. This genetic simplicity allows single-allele disruption to elicit full loss-of-function phenotypes, making HAP1 cells ideal for large-scale genetic screens, CRISPR validation, and mechanistic studies. Their adherent growth and compatibility with diverse assay formats facilitate biochemical, imaging, and metabolic analyses.
KCTD15 encodes a substrate adaptor for the Cullin3-RING E3 ubiquitin ligase (CRL3) complex, interacting with CUL3 and RBX1 to target proteins such as GAPDH and ??-catenin for ubiquitination and proteasomal degradation. Consequently, KCTD15 negatively regulates Wnt/??-catenin signaling, dampening TCF/LEF-dependent transcription. The gene also functions downstream of SOX10 and PAX3 in neural crest specification and is modulated by BMP and Wnt signals during adipogenesis, positioning it as a nexus between metabolic regulation and developmental fate determination.
Knocking out KCTD15 in HAP1 cells leads to stabilization of its substrates, including ??-catenin and GAPDH, thereby enhancing Wnt pathway activity and glycolytic flux. The near-haploid background amplifies these effects, enabling clear phenotypic readouts in cell cycle progression, apoptosis, and metabolic shifts. This model provides a genetically clean system to study the consequences of impaired ubiquitin-dependent degradation on cellular physiology.
Applications include functional validation of BMI-associated loci in obesity research, investigation of ubiquitin-proteasome system dynamics via CUL3 co-immunoprecipitation and proteasome activity assays, and interrogation of neural crest development. The polyclonal format is optimized for high-throughput genetic screens and Wnt reporter assays, while cell cycle flow cytometry, Seahorse metabolic flux analysis, and RT-qPCR further expand its utility. For further information, please contact Ascent Research.
