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Upf1 | Regulator of nonsense transcripts 1 homolog; RNA-dependent helicase and ATPase required for nonsense- mediated decay (NMD) of mRNAs containing premature stop codons. Is recruited to mRNAs upon translation termination and undergoes a cycle of phosphorylation and dephosphorylation; its phosphorylation appears to be a key step in NMD. The formation of an Upf1-Upf2-Upf3 surveillance complex is believed to activate NMD (By similarity). (1180 aa) | ||||
rump | Rumpelstiltskin, isoform A; Rumpelstiltskin (rump) encodes the Drosophila hnRNP M homolog. It binds to nos and osk mRNAs and plays a role in mRNA localization to the germ plasm by diffusion/entrapment during late stages of oogenesis. It also binds to exonic splicing enhancers on pre-mRNA targets, implicating it as a splicing factor. (632 aa) |