The GSTK1 Knockout HAP1 Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal knockout cell population in which the GSTK1 gene has been disrupted in the HAP1 cell line. This heterogeneous pool captures a diverse array of loss-of-function alleles, avoiding clonal artefacts and enabling robust, population-level analyses. The polyclonal format is particularly suited for high-throughput phenotypic screens, bulk biochemical assays, and applications where clonal heterogeneity is undesirable.
HAP1 is a near-haploid human cell line derived from the KBM-7 chronic myeloid leukemia line, characterized by an adherent fibroblastoid morphology. Its near-haploid genome reduces genetic complexity and facilitates precise genome editing, making it a widely used platform for functional genomics, knockout validation, and cancer research. The minimized allelic redundancy in HAP1 cells allows for more direct attribution of phenotypic changes to the targeted gene disruption.
GSTK1 encodes a peroxisomal and mitochondrial glutathione S-transferase that catalyzes the conjugation of glutathione to electrophilic substrates, facilitating detoxification and antioxidant defense. This enzyme is transcriptionally activated by NRF2 (NFE2L2) and modulated by PPAR gamma, key transcriptional regulators of redox and metabolic homeostasis. GSTK1 functions within the glutathione metabolism network, directly interacting with glutathione, glutathione reductase, and other GST family members to neutralize xenobiotics and reactive oxygen species, thereby protecting organelles from oxidative damage.
Within the HAP1 cell context, which derives from a chronic myeloid leukemia origin, GSTK1 knockout creates a powerful model to investigate glutathione-mediated detoxification and its role in cancer cell biology. Ablation of GSTK1 can heighten sensitivity to electrophilic stress and oxidative challenge, enabling the dissection of drug resistance mechanisms and synthetic lethal interactions. The clean genetic background of HAP1 cells amplifies the observable consequences of GSTK1 loss, making it ideal for studying NRF2-regulated antioxidant programs and redox-dependent cell survival.
This polyclonal knockout model supports a broad range of applications, including oxidative stress assays (e.g., H?O?-induced cytotoxicity), quantitation of intracellular glutathione levels, and GST enzymatic activity measurements using substrates like CDNB. Western blotting and RT-qPCR allow confirmation of gene disruption and analysis of downstream pathway components. These cells are well-suited for functional genomics screens, xenobiotic detoxification profiling, and pharmacological studies addressing drug metabolism. For further information, please contact Ascent Research.
