IFI30 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the human near-haploid HAP1 cell line. This product comprises a heterogeneous pool of cells carrying targeted disruptions in the IFI30 gene, providing a robust loss-of-function model for investigating the role of IFI30 in antigen processing and MHC class II-restricted immune responses.
HAP1 cells originate from the KBM-7 chronic myeloid leukemia (CML) cell line and maintain a near-haploid karyotype, making them a valuable hematopoietic myeloid model system for genetic perturbation studies. As an adherent cell line with stable growth characteristics, HAP1 provides a consistent experimental platform for dissecting gene function in a human myeloid context, particularly in pathways related to immune regulation and lysosomal biology.
The IFI30 gene encodes gamma-interferon-inducible lysosomal thiol reductase (GILT), an enzyme critical for MHC class II-restricted antigen processing. IFI30 is transcriptionally activated by interferon gamma (IFNG) through the JAK1/2-STAT1 signaling axis and the transcription factor IRF1. Once expressed, IFI30 localizes to lysosomes where it reduces disulfide bonds in endocytosed proteins, a prerequisite for subsequent proteolytic cleavage by cathepsins S and L. This processing facilitates the loading of antigenic peptides onto MHC class II alpha/beta heterodimers in a complex with the invariant chain (CD74). The resulting peptide?CMHC class II repertoire presented on the cell surface is essential for CD4+ helper T cell activation. Thus, IFI30 functions downstream of IFNG receptors and upstream of the peptide-loading complex, bridging innate cytokine signals with adaptive immune recognition.
In the HAP1 myeloid leukemia background, IFI30 disruption allows researchers to examine how loss of lysosomal reductase activity alters MHC class II antigen presentation in a malignant hematopoietic setting. Given the role of IFI30 in processing self and pathogen-derived antigens, this knockout model is particularly relevant for studying molecular mechanisms of immune evasion in CML, where impaired antigen presentation may contribute to tumor escape from CD4+ T cell surveillance. Furthermore, the near-haploid nature of HAP1 simplifies genetic analyses, facilitating clean dissection of IFI30-dependent pathways in myeloid lineage cells.
IFI30 Knockout HAP1 Polyclonal Cells are suitable for a broad range of functional studies, including analysis of antigen processing kinetics via pulse-chase experiments, assessment of MHC class II surface expression by flow cytometry, and characterization of lysosomal protease activity. Co-immunoprecipitation assays can probe interactions between IFI30 and MHC class II or cathepsins, while RT-qPCR and Western blotting verify disruption of IFI30 expression. These cells also serve as a platform for reconstitution experiments with wild-type or mutant IFI30 variants to dissect structure-function relationships. For further details or assistance integrating this knockout model into your research, please contact Ascent Research.
