The HIRIP3 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell pool designed to disrupt the HIRIP3 gene within the HAP1 cell line. This product offers a genetically defined loss-of-function model that captures the heterogeneity of editing events, enabling robust functional studies of HIRIP3??s role in chromatin biology without the biases of clonal isolation.
The HAP1 cell line is a near-haploid human chronic myeloid leukemia (CML) line, prized for its stable haploid karyotype which simplifies genetic manipulation and minimizes diploid redundancy. Originating from a CML patient, HAP1 retains key myeloid features, making it an authentic model for studying leukemogenesis, signal transduction, and cell cycle regulation. The near-haploid genome enhances the efficiency of CRISPR/Cas9-mediated gene disruption, facilitating clean knockout generation.
HIRIP3 encodes a histone chaperone that selectively partners with the HIRA complex??comprising HIRA, UBN1, CABIN1, and ASF1A??to execute replication-independent deposition of histone variant H3.3 into chromatin. This epigenetic process is pivotal for maintaining nucleosome architecture at regulatory regions and modulating transcriptional programs that govern cell proliferation and development. HIRIP3 expression is driven by E2F transcription factors and cell cycle regulatory inputs, integrating extracellular signals with chromatin remodeling. Downstream, HIRIP3-mediated H3.3 incorporation directly shapes the histone H3.3 occupancy landscape and the transcriptional output of H3.3 target genes.
Disruption of HIRIP3 in the HAP1 near-haploid leukemia background offers a sophisticated system to examine how histone chaperone-mediated chromatin assembly influences neoplastic phenotypes. This model allows direct assessment of H3.3 deposition deficits on leukemogenic gene networks and cellular proliferation. Moreover, the emerging involvement of H3.3 chaperones in neurodevelopmental disorders renders these cells valuable for investigating molecular mechanisms underlying developmental abnormalities, thereby bridging cancer and neurobiology research.
Researchers can apply this knockout polyclonal population in diverse functional studies. Chromatin immunoprecipitation?Cquantitative PCR (ChIP-qPCR) and RNA sequencing (RNA-seq) enable mapping of altered H3.3 occupancy and global transcriptional effects. Cell proliferation assays and flow cytometric cell cycle profiling reveal growth consequences of HIRIP3 loss. Western blotting and RT-qPCR confirm HIRIP3 ablation and monitor downstream effectors. This product thus serves as a comprehensive resource for mechanistic investigations into histone chaperone biology, chromatin dynamics, and disease-relevant pathways. For further information or inquiries, please contact Ascent Research.
