The DNAH5 Knockout HAP1 Polyclonal Cells represent a CRISPR/Cas9-edited polyclonal knockout population derived from the near-haploid human HAP1 cell line, designed to disrupt the DNAH5 gene. This loss-of-function model delivers a heterogeneous cell pool that mirrors natural genetic variability, offering a robust platform for large-scale functional genomics, biochemical pathway analysis, and disease modeling in ciliary biology.
HAP1 cells originate from a male patient with chronic myeloid leukemia and possess a near-haploid karyotype, which significantly reduces the target allele number for CRISPR/Cas9 editing. This genetic simplicity maximizes the efficiency and consistency of gene disruption, making HAP1 an exceptional host for knockout screening, protein interactome mapping, and validation of drug targets, with minimal interference from redundant alleles.
The DNAH5 gene product is a heavy chain component of the outer dynein arm, a microtubule motor essential for ciliary and flagellar motility. It couples ATP hydrolysis to mechanical force, driving rhythmic beating. DNAH5 expression is under the transcriptional control of master ciliogenic regulators FOXJ1 and RFX transcription factors, with additional modulation by multicilin and Notch signaling. Within the axoneme, DNAH5 forms complexes with other outer dynein arm subunits DNAI1 and DNAI2, linker protein DNAL1, and the cytoplasmic preassembly factors DNAAF2 and DNAAF3. Disruption of DNAH5 prevents proper outer dynein arm formation, leading to complete loss of ciliary movement, defective mucociliary clearance, disruption of embryonic nodal flow, and failure of left-right asymmetry establishment??hallmarks of primary ciliary dyskinesia.
In the HAP1 cellular context, DNAH5 knockout creates a simplified paradigm to dissect axonemal dynein assembly and function. Although HAP1 cells are fibroblast-like, they retain the capacity for ciliogenesis upon induction, allowing researchers to examine DNAH5’s role in de novo cilia formation. This model faithfully recapitulates the molecular pathology of primary ciliary dyskinesia, supporting mechanistic studies and the evaluation of rescue strategies or pharmacological correctors.
These DNAH5 Knockout HAP1 Polyclonal Cells are applicable in diverse experimental workflows. Protein loss can be verified by Western blotting, while RT-qPCR quantifies transcript reduction. Immunofluorescence after ciliogenesis induction reveals ciliary marker localization defects. Co-immunoprecipitation assays map assembly of the dynein complex, and functional tests??such as cell migration or ciliary beat frequency measurements in differentiated cultures??assess motility. The model is ideal for primary ciliary dyskinesia disease modeling, airway epithelial research, sperm motility studies, and high-throughput screening for ciliopathy therapeutics. For custom solutions, contact Ascent Research.
