The DYNLT1 Knockout HeLa Polyclonal Cells comprise a heterogeneous population of HeLa cells that have undergone CRISPR/Cas9-mediated disruption of the DYNLT1 gene. DYNLT1 encodes a light chain subunit of the cytoplasmic dynein motor complex, and its ablation yields a versatile loss-of-function model. This polyclonal product provides a cost-effective alternative to clonal cell lines, capturing a range of editing outcomes without the need for single-cell isolation, making it suitable for pooled functional genomics screens and population-level analyses.
The parental HeLa cell line is an HPV18-positive cervical adenocarcinoma model in which the viral oncoproteins E6 and E7 inactivate p53 and Rb, respectively. This immortalized epithelial line exhibits rapid proliferation and genomic instability. The compromised G1/S and G2/M checkpoints heighten sensitivity to mitotic defects, positioning HeLa as an ideal host for examining the roles of dynein-associated proteins like DYNLT1 in cell division and intracellular trafficking.
DYNLT1 is an integral light chain of the cytoplasmic dynein complex, linking the heavy chain to cargo adaptors. It directly interacts with the intermediate chain DYNC1I1 and heavy chain DYNC1H1, and is recruited to cargo via adapter proteins such as BICD2. Mitotic kinases CDK1 and PLK1 phosphorylate DYNLT1 to regulate dynein motility and cargo binding. Functionally, DYNLT1 is essential for retrograde transport of endosomes, lysosomes, and the Golgi apparatus, as well as for mitotic spindle assembly and chromosome segregation. In the broader dynein pathway, it cooperates with PAFAH1B1 and NDEL1 to maintain organelle distribution and mitotic timing.
In HeLa cells, loss of DYNLT1 disrupts dynein-mediated trafficking, leading to juxtanuclear clustering of normally dispersed organelles and delayed endocytic recycling. During mitosis, the absence of DYNLT1 impairs aster formation and spindle pole focusing, resulting in prolonged prometaphase/metaphase and frequent chromosome misalignment. The combination of these mitotic errors with HeLa??s intrinsic checkpoint deficiencies promotes aneuploidy and mitotic catastrophe. Furthermore, DYNLT1 knockout compromises dynein-driven nuclear positioning and focal adhesion turnover, significantly attenuating cell migration and invasion. These defects underscore the protein??s importance in both interphase trafficking and mitotic fidelity.
This polyclonal knockout pool is validated for multiple downstream applications. Western blotting confirms loss of DYNLT1 protein expression, while co-immunoprecipitation using antibodies against DYNC1H1 or DYNC1I1 permits assessment of dynein complex integrity. Immunofluorescence staining for Golgi, endosomes, and lysosomes visualizes organelle mispositioning. Live-cell imaging of fluorescently tagged cargoes quantifies deficits in retrograde transport velocity. Flow cytometric cell cycle analysis and mitotic index scoring via phospho-histone H3 staining reveal delays in mitotic progression. Wound-healing assays measure migratory defects, and RNA-seq uncovers global transcriptome changes. Collectively, these applications make the cells invaluable for studying dynein-related mechanisms in neurodegeneration, cancer, and primary ciliary dyskinesia. For further details, contact Ascent Research.
