The KRT2 Knockout HAP1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population derived from the HAP1 human cell line, featuring targeted gene disruption of KRT2. This loss-of-function model is designed for studies of keratin biology and epidermal differentiation. The polyclonal format provides a diverse pool of indels, enabling robust functional analyses without clonal artifacts. It is a versatile tool for investigating KRT2 ablation in a near-haploid background, suitable for genetic screens and mechanistic studies.
HAP1 is a near-haploid human cell line originating from the KBM-7 chronic myeloid leukemia line. Its haploid genome makes it ideal for CRISPR-based genetic screening, as single-allele disruption yields clear knockout phenotypes. HAP1 is widely used in cancer research and drug discovery. Its robust growth and ease of manipulation facilitate knockout population generation. For KRT2, this background provides a simplified genomic environment to dissect gene function independently of keratinocyte differentiation programs.
KRT2 encodes keratin 2, a type II intermediate filament protein expressed in upper epidermis layers. It heterodimerizes with KRT10 to form filaments providing mechanical strength. KRT2 expression is regulated by p63, AP-1, calcium, retinoic acid, and EGF. It interacts with desmoplakin, plakoglobin, and desmocollin, linking filaments to desmosomes. Downstream, proper filament assembly is required for filaggrin, loricrin, and involucrin processing. KRT2 loss disrupts filament integrity, impairing epidermal differentiation and barrier function, mirroring ichthyosis bullosa of Siemens.
In HAP1 cells, KRT2 knockout enables systematic dissection of its functions without the complexity of diploid keratinocyte models. Although HAP1 does not form epidermal tissue, it permits investigation of intrinsic roles such as intermediate filament assembly, protein?Cprotein interactions, and upstream regulatory inputs. The haploid state ensures that single-allele disruption produces clear loss-of-function phenotypes, eliminating confounding background effects. This model is well-suited for chemical screens to identify modulators of keratin dynamics, complementation studies with disease-associated variants, and genome-wide genetic interaction mapping. It provides a focused platform for drug discovery efforts targeting keratin-dependent cellular processes.
The polyclonal knockout population is applicable to diverse assays. Immunofluorescence and western blotting assess keratin expression and localization; RT-qPCR quantifies differentiation markers like filaggrin and loricrin; electron microscopy reveals filament morphology defects. Co-immunoprecipitation detects altered interactions with KRT10, desmoplakin, and plakoglobin. Pooled CRISPR screens can identify genetic suppressors or enhancers of the KRT2 knockout phenotype. These approaches support drug screening for keratinopathies and mechanistic studies of intermediate filament biology. For additional information, please contact Ascent Research.
