Reference: Kuroha K, et al. (2009) Upf1 stimulates degradation of the product derived from aberrant messenger RNA containing a specific nonsense mutation by the proteasome. EMBO Rep 10(11):1265-71

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Abstract


Aberrant messenger RNAs containing a premature termination codon (PTC) are eliminated by the nonsense-mediated mRNA decay (NMD) pathway. Here, we show that a crucial NMD factor, up frameshift 1 protein (Upf1), is required for rapid proteasome-mediated degradation of an aberrant protein (PTC product) derived from a PTC-containing mRNA. Western blot and pulse-chase analyses revealed that Upf1 stimulates the degradation of specific PTC products by the proteasome. Moreover, the Upf1-dependent, proteasome-mediated degradation of the PTC product was also stimulated by mRNAs harbouring a faux 3' untranslated region (3'-UTR). These results indicate that protein stability might be regulated by an aberrant mRNA 3'-UTR.

Reference Type
Journal Article | Research Support, Non-U.S. Gov't
Authors
Kuroha K, Tatematsu T, Inada T
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