The DUS1L Knockout K-562 Polyclonal Cells product is a CRISPR/Cas9-edited polyclonal knockout cell population generated through targeted disruption of the DUS1L gene in the K-562 cell line. This loss-of-function model enables investigation of DUS1L??s role in tRNA dihydrouridine modification without requiring isolation of single-cell clones. The polyclonal format preserves population heterogeneity, making it suitable for pooled loss-of-function phenotyping in hematopoietic malignancy contexts.
The host K-562 cell line is a widely used suspension model derived from the pleural effusion of a 53-year-old female with chronic myelogenous leukemia in blast crisis. K-562 cells harbor the hallmark Philadelphia chromosome, expressing the BCR-ABL1 fusion oncoprotein, which drives constitutive tyrosine kinase activity and aberrant downstream signaling. This cell line serves as a robust platform for studying leukemia biology, hematopoietic differentiation, and BCR-ABL-dependent oncogenic mechanisms.
DUS1L encodes a tRNA dihydrouridine synthase that catalyzes the NADPH-dependent reduction of uridine to dihydrouridine at specific positions in tRNA molecules. This modification promotes tRNA structural stability and accurate codon?Canticodon pairing during mRNA translation. DUS1L is functionally connected to key regulatory circuits: it may be transcriptionally regulated by MYC and operates downstream of BCR-ABL signaling. Its substrates include a subset of tRNA species, and it associates with tRNA modification complexes and ribosome-associated proteins. Pathway components comprising DUS1L, tRNA, dihydrouridine, and translation elongation factors collectively maintain translation fidelity. Disruption of DUS1L therefore impairs proper tRNA modification, potentially destabilizing translation dynamics and affecting proteome integrity.
In the context of K-562 leukemia cells, loss of DUS1L function offers a means to dissect how tRNA modifications interface with oncogenic translation programs. BCR-ABL signaling is known to rewire protein synthesis to support malignant proliferation and survival. By eliminating DUS1L-mediated dihydrouridylation, this model may reveal critical dependencies on translation fidelity and tRNA stability in leukemic cells. Consequently, it can be used to probe the role of RNA metabolism in stress responses, such as the unfolded protein response, and to identify vulnerabilities that could enhance sensitivity to tyrosine kinase inhibitors or other therapeutics.
Researchers can apply the DUS1L Knockout K-562 Polyclonal Cells in a variety of experimental workflows. Typical assays include RNA-seq and polysome profiling to assess global translation changes, mass spectrometry for direct measurement of tRNA dihydrouridine levels, western blotting and RT-qPCR for profiling downstream effector expression, and functional assays such as proliferation and drug sensitivity screens. These applications support studies in cancer biology, functional genomics of RNA modifications, and translational control mechanisms. For inquiries regarding custom applications or additional characterization data, please contact Ascent Research.
