DTD1 Knockout SK-HEP-1 Polyclonal Cells are a CRISPR/Cas9-edited polyclonal knockout cell population that enables loss-of-function analysis of DTD1. The polyclonal pool, generated by CRISPR/Cas9-mediated gene disruption in SK-HEP-1 cells, provides a heterogeneous population that mitigates clonal variability. This model supports robust investigation of DTD1-dependent processes without the artifacts associated with single-cell-derived clones.
SK-HEP-1 is a human liver adenocarcinoma cell line derived from ascites, exhibiting both epithelial and mesenchymal traits. Its hepatic tumor origin and phenotypic plasticity make it a valuable model for liver cancer biology, including metastasis, drug metabolism, and angiogenesis studies. The SK-HEP-1 background offers a clinically relevant context for examining protein homeostasis pathways in hepatocellular carcinoma.
DTD1 functions as a D-aminoacyl-tRNA deacylase that ensures translation fidelity by hydrolyzing D-tyrosyl-tRNA(Tyr) and other mischarged tRNAs. It cleaves the ester bond linking D-tyrosine to tRNA(Tyr), releasing the tRNA for correct aminoacylation. DTD1 acts downstream of aminoacyl-tRNA synthetases, interacting with tRNA(Tyr) and D-tyrosine. This editing activity is central to the proteostasis network, safeguarding the proteome against erroneous D-amino acid incorporation and maintaining ribosomal translation accuracy.
In the cancerous SK-HEP-1 setting, DTD1 disruption may expose heightened sensitivity to proteotoxic stress and D-amino acid imbalances. Liver adenocarcinoma cells often rely on robust protein quality control mechanisms; abrogating DTD1 allows dissection of how translation fidelity defects impact cell viability and stress responses. This model is particularly suited for studying the role of D-aminoacyl-tRNA editing in mesenchymal-epithelial transitions and liver tumor pathogenesis.
Applications include translation fidelity assays, protein quality control studies, and D-amino acid metabolism research. Standard validation involves Western blotting for DTD1 protein levels, D-tyrosyl-tRNA hydrolysis activity assays, puromycin incorporation measurements, and mass spectrometry for D-amino acid detection. Cell viability testing under D-amino acid stress further delineates functional impacts. For additional information, please contact Ascent Research.
