The DNAL1 Knockout K-562 Polyclonal Cells constitute a human CRISPR/Cas9-edited polyclonal knockout cell population in which the DNAL1 gene has been disrupted. This polyclonal pool is derived from the K-562 cell line and offers a genetically heterogeneous loss-of-function model, avoiding the limitations of single-cell clonal selection. The knockout population is generated by CRISPR/Cas9-mediated gene disruption, providing a robust tool for dissecting DNAL1 function in a cellular context that lacks endogenous motile cilia.
The parental K-562 cell line is a widely utilized human chronic myeloid leukemia (CML) model, originally derived from the pleural effusion of a 53-year-old female in blast crisis. K-562 cells harbor the hallmark BCR-ABL translocation, driving constitutive tyrosine kinase activity and providing a relevant background for leukemia and hematopoietic differentiation studies. Notably, K-562 cells do not form motile cilia, making them an ideal host for investigating cilia-independent roles of the DNAL1 gene product without confounding effects from ciliary motility.
DNAL1 encodes a light chain component of the outer dynein arm, a multi-subunit motor complex essential for ciliary and flagellar motility. Within the axoneme, DNAL1 interacts with key heavy and intermediate chains such as DNAH5, DNAI1, and DNAH11 to coordinate microtubule sliding and ciliary beat frequency. Its expression is transcriptionally regulated by ciliogenesis factors FOXJ1, RFX2, and RFX3. Disruption of DNAL1 impairs outer dynein arm assembly and downstream ciliary beat regulation. In non-ciliated contexts, emerging evidence suggests potential alternative roles for DNAL1 outside of axonemal complexes, which remain poorly characterized.
By engineering DNAL1 knockout in K-562 cells, this model enables the exploration of non-ciliary functions of the outer dynein arm light chain in a leukemic background. The absence of motile cilia allows researchers to attribute observed phenotypes specifically to cilia-independent mechanisms, avoiding the secondary effects of impaired ciliary motility. The polyclonal nature of the knockout population maintains genetic diversity, reducing the risk of clonal artifacts and making it suitable for population-level functional assays, such as proliferation studies and drug response profiling in the context of BCR-ABL signaling.
This DNAL1 polyclonal knockout model supports a broad range of research applications. It can be employed to elucidate non-ciliary roles of DNAL1 through protein interaction studies using co-immunoprecipitation, transcriptomic analysis via RNA-seq, and validation by western blotting and RT-qPCR. The model is also applicable for modeling primary ciliary dyskinesia-associated phenotypes, drug screening for ciliopathies, and investigating potential crosstalk between DNAL1 and leukemogenic pathways. Functional assays, including flow cytometry for cell cycle analysis and cell proliferation assays, further extend its utility. For technical inquiries and ordering, please contact Ascent Research.
