The H1-2 Knockout HEK293T Polyclonal Cells product consists of a CRISPR/Cas9-mediated gene-disrupted polyclonal cell population in the HEK293T human embryonic kidney epithelial line, designed for loss-of-function studies of the H1-2 gene encoding histone H1.2. This polyclonal knockout model introduces targeted disruptions across the H1-2 locus, producing a heterogeneous allele pool that avoids clonal bias and supports robust investigation of linker histone biology. The cells are provided as a ready-to-use population optimized for functional, biochemical, and genomic assays.
HEK293T is a highly transformable derivative of the HEK293 cell line, stably expressing SV40 large T antigen, which enables episomal vector replication and high-titer viral production. Derived from human embryonic kidney tissue, this adherent epithelial line exhibits rapid growth and supports robust recombinant protein expression. Its well-characterized chromatin landscape and active cell cycle make it a suitable host for dissecting linker histone functions. The cell line is widely employed in functional genomics, signal transduction, and large-scale protein manufacturing studies.
Histone H1.2 is a somatic linker histone that binds nucleosomal DNA to promote chromatin compaction and higher-order fiber formation, thereby regulating transcription, replication, and cell cycle progression. Transcriptionally controlled by E2F factors and post-translationally modified by CDK1 and CDK2/Cyclin E complexes, H1.2 modulates chromatin dynamics through direct interactions with core histones, HP1, PARP1, and DNMT1. It functions within the NPAT?CSLBP?CCDK2/Cyclin E axis to coordinate histone supply with S-phase entry. H1.2 loss reduces chromatin condensation, alters global gene expression, and sensitizes cells to apoptosis, highlighting its importance in lymphoma and cancer biology.
In HEK293T cells, which already possess a relatively open chromatin state due to transformation, H1-2 knockout further relaxes chromatin compaction, offering a tractable model to study epigenetic reprogramming and transcriptional dysregulation. The polyclonal editing strategy preserves population-level heterogeneity, mitigating clonal artifacts and better reflecting physiological H1.2 loss. This system facilitates investigation of replication fork stability, apoptotic checkpoint control, and gene expression coordination in a rapidly dividing epithelial background. HEK293T??s amenability to biochemical fractionation and high-resolution imaging enables detailed analysis of nucleosome dynamics and chromatin architectural changes.
Key applications include ATAC-seq and ChIP-seq for chromatin accessibility and histone modification profiling, RNA-seq for transcriptome analysis, and Western blotting for H1.2 depletion confirmation. Immunofluorescence can assess higher-order chromatin structure, while flow cytometry enables cell cycle profiling. The model is valuable for drug screening targeting chromatin-modifying enzymes and for identifying synthetic lethal interactions via pooled CRISPR screens, particularly in lymphoma research. For technical inquiries, please contact Ascent Research.
