The DNAL4 Knockout HeLa Polyclonal Cells consist of a CRISPR/Cas9-edited polyclonal cell population with targeted disruption of the DNAL4 gene in HeLa cells. This loss-of-function model eliminates DNAL4 protein expression, providing a robust platform to investigate the molecular role of this dynein component in ciliary biology. The polyclonal format avoids clonal bias, ensuring a heterogeneous genetic background that better reflects population-level responses in functional assays.
The host HeLa line, an HPV18-positive cervical adenocarcinoma cell line, is a widely used epithelial cancer model valued for its rapid growth and genetic tractability. Although HeLa cells are not inherently ciliated, they can be induced to form primary cilia by serum withdrawal, enabling studies of ciliary protein assembly and dynein complex formation. This background makes the DNAL4 knockout particularly useful for dissecting outer dynein arm assembly in a simplified cellular context.
DNAL4 encodes a light intermediate chain of the outer dynein arm of motile cilia. Under the transcriptional control of ciliogenic regulators RFX2 and FOXJ1, DNAL4 is integrated into the dynein motor complex alongside subunits such as DNAH5, DNAI1, and DNALI1. Disruption of DNAL4 destabilizes outer dynein arm assembly, leading to impaired ciliary beat and defective mucociliary clearance as seen in primary ciliary dyskinesia. This knockout thus recapitulates a critical ciliopathy phenotype at the molecular level.
Within the HeLa model, the DNAL4 knockout allows focused analysis of outer dynein arm biogenesis independent of multiciliated tissue complexity. The loss of DNAL4 provides a clean system to examine how dynein subunits interact and to map the hierarchical steps of arm assembly. Additionally, HeLa cells support the study of potential non-ciliary functions of DNAL4, given the emerging roles of ciliary proteins in cell cycle and cancer, thereby expanding the model??s utility beyond classical ciliopathy research.
Typical applications include co-immunoprecipitation and western blotting to evaluate dynein complex integrity, immunofluorescence microscopy to assess DNAL4 localization under ciliogenic conditions, and RT-qPCR to measure changes in ciliary transcription programs. This polyclonal knockout cell population is also suitable for primary ciliary dyskinesia modeling, drug screening for ciliary dysfunction, and studying DNAL4??s role in oncogenic pathways. For further information or procurement, please contact Ascent Research.
