The HP1BP3 Knockout Jurkat Polyclonal Cells constitute a CRISPR/Cas9-edited polyclonal population harboring targeted disruption of the HP1BP3 gene in the Jurkat T-lymphoblastoid cell line. This polyclonal knockout pool offers a genetically diverse population suitable for studying loss-of-function phenotypes of HP1BP3 while mitigating clonal selection artifacts. The product enables robust functional investigations into chromatin regulation and T-cell biology without necessitating single-cell clone isolation.
Jurkat cells are derived from the peripheral blood of a 14-year-old male with acute T-cell leukemia, representing a widely used model for T-cell receptor signaling, cytokine production, and apoptosis. Their leukemic origin and stable growth characteristics render them particularly valuable for dissecting molecular mechanisms underlying T-cell malignancies. This host cell line provides a well-characterized background for examining the intersection of chromatin dynamics and oncogenic signaling.
HP1BP3 is a chromatin-associated protein that interacts with heterochromatin protein 1 homologs (CBX5/HP1??, CBX1/HP1??, CBX3/HP1??) and promotes heterochromatin compaction and gene silencing. It functions downstream of DNA damage signals and tumor suppressors p53 and RB1, and acts upstream of CDKN1A (p21) and LMNB1. Within the heterochromatin assembly pathway, the SUV39H1 methyltransferase deposits H3K9me3 marks, which are recognized by CBX5, facilitating HP1BP3 recruitment and subsequent histone deacetylase (HDAC)-mediated chromatin condensation. This cascade transcriptionally represses senescence-associated secretory phenotype (SASP) factors, linking HP1BP3 to cellular senescence control.
In Jurkat cells, disruption of HP1BP3 is expected to relieve heterochromatin-mediated silencing, potentially altering gene expression programs that regulate proliferation and apoptotic sensitivity. Given the role of HP1BP3 in p53/p21-dependent senescence and DNA damage responses, this knockout model provides a relevant system to study how heterochromatin dysregulation influences T-cell leukemic growth and drug responses. Such investigations are particularly pertinent to acute lymphoblastic leukemia and broader cancer research, where chromatin organization is frequently perturbed.
This polyclonal knockout cell product supports a range of experimental approaches, including ChIP-qPCR, immunofluorescence, and RNA-seq to map chromatin state and transcriptional changes, as well as flow cytometry and apoptosis assays to evaluate death receptor signaling and chemosensitivity. Researchers may employ these cells to explore HP1BP3-dependent gene regulation, cellular senescence, and heterochromatin dynamics in a T-lymphoblastoid context. For additional technical details, researchers may contact Ascent Research.
