Description

The Nsun6 Knockout NIH 3T3 Cell Line is a CRISPR/Cas9-edited knockout cell line from the immortalized mouse embryonic fibroblast NIH 3T3. It carries a targeted disruption of the Nsun6 gene, which encodes an RNA methyltransferase responsible for m5C modification in tRNAs and mRNAs. This loss-of-function model enables investigation of tRNA methylation-dependent processes in a defined fibroblast background.

NIH 3T3 cells originate from Swiss mouse embryo tissue and are widely used to study cell adhesion, proliferation, and migration. Their immortalized status and well-characterized signaling make them an optimal host for genetic perturbation. The Nsun6 knockout retains the parental line??s growth properties while eliminating Nsun6 activity, facilitating dissection of Nsun6??s role in fundamental cellular behaviors.

Nsun6 catalyzes m5C at C72 of tRNA(Cys) and tRNA(Thr), ensuring translation fidelity and proper codon reading. It also methylates specific mRNAs, influencing gene expression. Upstream regulators c-Myc and miR-125b control Nsun6 expression. Downstream targets include tRNA substrates and cell cycle regulators, with interacting factors like ribosomal proteins. Pathway analysis reveals involvement of c-Myc, Cyclin D1, p21, E-cadherin, and Vimentin. Loss of Nsun6 reduces proliferation and migration, likely via dysregulation of cell cycle and EMT-related protein expression.

In NIH 3T3 fibroblasts, Nsun6 knockout impairs proliferation and migration, modeling tumor suppressor or oncogene functions depending on context. The line is valuable for studying m5C-related mechanisms in hepatocellular carcinoma, colorectal cancer, and breast cancer. Altered E-cadherin and Vimentin levels highlight its relevance to EMT and metastasis. Researchers can exploit this model to link tRNA methylation to cancer cell phenotypes.

Applications include tRNA bisulfite sequencing and RNA-seq for methylation profiling, MTT and colony formation assays for proliferation, wound healing for migration, and flow cytometry for cell cycle analysis. RT-qPCR and Western blot confirm knockout efficiency. This cell line also enables screening for m5C modulators, aiding drug discovery and RNA epigenetics research. For further information, please contact Ascent Research.