The IMPDH1 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population engineered for targeted disruption of the IMPDH1 gene. This product provides a powerful loss-of-function model system for investigating the biological functions of IMPDH1 in a near-haploid human cell background. The polyclonal nature ensures a diverse pool of edited alleles, enabling robust functional studies without the limitations inherent to single clones. Researchers can utilize this model to dissect the role of IMPDH1 in nucleotide metabolism and downstream cellular processes.
HAP1 cells are a haploid human cell line derived from the KBM-7 chronic myeloid leukemia line, possessing a near-haploid karyotype that simplifies genetic analysis and knockout validation. This host cell background is highly advantageous for studying genes involved in cell cycle regulation and signaling, as the single allelic copy allows for unambiguous genotype-phenotype correlations. HAP1 cells retain many characteristics of their leukemic origin, making them particularly suitable for research into cancer biology, drug sensitivity, and metabolic pathways.
IMPDH1 encodes inosine monophosphate dehydrogenase 1, the rate-limiting enzyme that converts IMP to XMP in de novo guanine nucleotide biosynthesis. This reaction is regulated by growth factor signaling and NF-Y, and is potently inhibited by mycophenolic acid. IMPDH1 controls intracellular GTP pools, which directly influence mTORC1 activity and Cyclin D1 expression, thereby coupling nucleotide metabolism to cell proliferation and cell cycle progression. IMPDH1 also interacts with IMPDH2 and other purine biosynthesis enzymes, forming dynamic filaments that modulate its catalytic function. Through these interactions, IMPDH1 serves as a metabolic hub linking nucleotide production to downstream signaling and biosynthetic demands.
In the HAP1 background, IMPDH1 disruption provides a clean system to assess guanine nucleotide homeostasis, essential for DNA and RNA synthesis and proliferation. The leukemic origin makes these cells relevant for studying cancer dependencies on nucleotide metabolism and testing inhibitors like mycophenolic acid. The haploid nature avoids compensatory effects, enabling precise analysis of IMPDH1-mediated mTOR signaling and cell cycle control. This model is also pertinent to retinitis pigmentosa research, as IMPDH1 mutations cause retinal degeneration, and HAP1 cells can help elucidate pathogenic mechanisms.
Research applications of the IMPDH1 Knockout HAP1 Polyclonal Cells span diverse areas including nucleotide metabolism, drug sensitivity and resistance, and cancer biology. The cells are amenable to a variety of assays such as Western blotting and RT-qPCR for expression analysis, MTS viability assays for proliferation, and HPLC-based nucleotide pool quantification. Functional assessments can be performed using mycophenolic acid dose-response experiments, colony formation assays, and flow cytometry for DNA content analysis. These applications enable detailed mechanistic studies of how IMPDH1 regulates key signaling pathways and metabolic checkpoints. For additional details and ordering information, please contact Ascent Research.
