The DNAL1 Knockout HAP1 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population in which the human DNAL1 locus has been targeted for gene disruption. This population consists of a heterogeneous pool of HAP1 cells carrying diverse loss-of-function modifications at the DNAL1 locus, collectively eliminating wild-type DNAL1 protein expression. Delivered as a suspension culture, these near-haploid cells provide a genetically simplified background for investigating the dynein arm component DNAL1, enabling robust loss-of-function studies without the clonal variation associated with single-cell-derived lines.
HAP1 cells are derived from the KBM-7 chronic myeloid leukemia cell line, which contains the BCR-ABL1 fusion and exhibits a near-haploid karyotype. This haploid state makes HAP1 exceptionally valuable for genetic screens and functional genomics, as it allows direct genotype-phenotype correlations and facilitates high-throughput knockout and knockdown approaches. The cells grow in suspension, are easily transfected, and are widely used for target validation, drug discovery, and mapping of signaling pathways. Their use in knockout studies benefits from the unambiguous disruption of single gene copies, simplifying interpretation of genetic interactions.
DNAL1 encodes a light intermediate chain of the outer dynein arm complex, a multi-subunit ATPase essential for generating ciliary and flagellar motility. Transcription of DNAL1 is regulated by the forkhead box transcription factor FOXJ1 and the regulatory factor X proteins RFX2 and RFX3, which are master regulators of ciliogenesis. The DNAL1 protein interacts with the outer dynein arm heavy chain DNAH5, intermediate chains DNAI1 and DNAI2, and the outer dynein arm docking complex to coordinate dynein arm assembly and attachment. Disruption of DNAL1 impairs the formation of functional dynein arms, leading to reduced ciliary beat frequency and defective sperm flagellar movement, thereby linking DNAL1 directly to motile ciliopathy phenotypes.
In the HAP1 cellular context, DNAL1 knockout provides a clean and tractable model for dissecting the role of this light intermediate chain in dynein arm biology. Although HAP1 cells are not ciliated under standard culture conditions, their haploid genome enables unambiguous gene disruption, making them an ideal platform for complementation studies with wild-type or mutant DNAL1 constructs. The polyclonal nature of this knockout population ensures comprehensive abrogation of DNAL1 function across all cells, reducing experimental variability and supporting robust downstream assays. This model is particularly well-suited for proteomic and interactomic analyses aimed at mapping the outer dynein arm assembly pathway and identifying novel binding partners.
This knockout cell product enables a wide range of research applications, including mechanistic studies of ciliary motility, modeling of primary ciliary dyskinesia type 16 (CILD16), genetic screening for ciliopathy modifiers, and pharmacological testing of compounds that may restore dynein arm function. Typical assays that can be performed with these cells include western blotting and RT?qPCR to confirm DNAL1 ablation, immunofluorescence to visualize outer dynein arm components such as DNAH5 and DNAI1, co-immunoprecipitation for interaction studies, Sanger sequencing for genotyping, and motility assays when cells are induced to form cilia or flagella. For detailed product inquiries and custom gene-editing services, please contact Ascent Research.
