The H1-5 Knockout HeLa Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HeLa human cervical adenocarcinoma line, featuring targeted disruption of the H1-5 gene (HIST1H1B). This loss-of-function model is generated through CRISPR/Cas9-mediated gene disruption, yielding a heterogeneous pool of edited cells suitable for studying the global effects of H1-5 depletion in a widely used epithelial cancer cell model.
The HeLa cell line, isolated from a cervical adenocarcinoma of Henrietta Lacks, is a robust immortalized human epithelial cell line extensively employed in biomedical research. Its rapid growth, stable karyotype, and well-characterized molecular landscape make HeLa an ideal host for investigating chromatin dynamics, transcriptional regulation, and oncogenic processes. The H1-5 knockout in this background enables controlled examination of linker histone function within a chromosomally unstable and transcriptionally active cancer cell environment.
H1-5 is a linker histone that binds to nucleosomal DNA, facilitating higher-order chromatin compaction and transcriptional repression. It interacts with core histones, nucleosomal DNA, heterochromatin protein 1 (HP1), and the lamin B receptor, integrating chromatin structure with nuclear architecture. H1-5 expression is cell cycle-regulated, driven by cyclin-dependent kinases and E2F transcription factors, and its activity downstream leads to global gene silencing, modulation of transcription factor binding, and chromatin condensation. Mechanistically, H1-5 functions within pathways involving HIST1H1B, nucleosome assembly, chromatin remodeling complexes (SWI/SNF, ISWI), and cohesin, collectively governing epigenetic gene regulation.
In the HeLa cell context, disruption of H1-5 is anticipated to cause widespread chromatin decondensation, leading to altered accessibility and dysregulation of gene expression programs critical for cell proliferation, migration, and survival. This knockout model provides a relevant platform for dissecting how loss of linker histone?Cmediated compaction influences oncogenic transcriptional networks and contributes to phenotypes associated with chromatin-related disorders. The polyclonal nature preserves population-level heterogeneity, offering a physiologically representative system for functional genomics and drug sensitivity studies.
Researchers can employ these H1-5 knockout HeLa cells for detailed chromatin architecture studies using assays such as ATAC-seq for chromatin accessibility, ChIP-seq for histone modification profiling, and immunofluorescence?Cbased visualization of chromatin structure. Functional assays including Western blotting and RT-qPCR confirm H1-5 depletion, while cell proliferation, migration, and invasion assays assess phenotypic consequences. This model is valuable for epigenetic drug screening, investigation of chromatin remodeling dynamics, and exploration of cancer vulnerabilities. For technical inquiries and ordering, please contact Ascent Research.
