The HOMEZ Knockout HAP1 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population designed for loss-of-function analysis of the HOMEZ gene in the HAP1 near-haploid human cell line. This polyclonal format provides a heterogeneous pool of cells carrying diverse CRISPR/Cas9-mediated gene disruptions at the HOMEZ locus, avoiding the biases associated with single-cell cloning. Researchers can use these cells to investigate HOMEZ-dependent transcriptional regulation and its contribution to spermatogenesis pathways.
HAP1 is a near-haploid cell line derived from the chronic myeloid leukemia line KBM-7, retaining a haploid karyotype except for disomy of chromosome 8. Its reduced genetic complexity facilitates clear genotype-phenotype correlations, making it a preferred host for genetic screens, drug discovery, and functional genomics. The near-haploid background ensures that knockout of a gene like HOMEZ results in unambiguous loss of function, as there is no second functional allele to compensate, enabling rigorous mechanistic studies.
HOMEZ encodes a testis-specific homeodomain-leucine zipper transcription factor implicated in spermatogenesis. The homeodomain mediates DNA binding, while the leucine zipper enables dimerization with other leucine zipper proteins, possibly forming complexes that regulate germ cell-specific gene expression. Although its full transcriptional network is unknown, pathway components associated with HOMEZ include SYCP3, PRM1, TNP1, and CREM, which are involved in meiosis, chromatin remodeling, and spermatid development. Upstream regulation is poorly characterized but may involve testicular signaling and the ACT transcription factor.
In the HAP1 myeloid progenitor context, HOMEZ knockout allows dissection of its transcriptional targets in a controlled genetic environment. While HOMEZ is not endogenously expressed in HAP1, ectopic expression or modeling of testis-specific pathways can be studied. The near-haploid nature of HAP1 eliminates confounding functional compensation, making it ideal for transcription factor functional analysis using techniques such as ChIP-seq and luciferase reporter assays to map HOMEZ binding and transactivation activity.
This polyclonal knockout pool is suited for gene regulation studies, CRISPR screen controls, and mechanistic exploration of HOMEZ function. Standard assays include Western blot and RT-qPCR for confirming loss of HOMEZ expression, ChIP-seq for target identification, and immunofluorescence for localization. The mixed knockout population serves as a robust control in pooled screening formats. For further technical details and ordering, please contact Ascent Research.
