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Trimethylguanosine synthase 1 (TGS1) is a conserved enzyme that mediates formation of the trimethylguanosine cap on several RNAs, including snRNAs and telomerase RNA. Previous studies have shown that TGS1 binds the Survival Motor Neuron (SMN) protein, whose deficiency causes spinal muscular atrophy (SMA). In addition, TGS1 depletion results in increased hTR levels and telomere elongation in human cells. Here, we analyzed the roles of the Drosophila orthologs of the human TGS1 and SMN genes. Wedoi:10.1101/2020.02.06.936724 fatcat:vhwy3dpysbh2lpyo2c4vrggcjq