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- Title
Pioneer round of translation mediated by nuclear cap-binding proteins CBP80/20 occurs during prolonged hypoxia
- Authors
Oh, Nara; Kim, Kyoung Mi; Choe, Junho; Kim, Yoon Ki
- Abstract
Abstract: Nonsense-mediated mRNA decay (NMD) is one of the mRNA surveillance mechanisms, which eliminates aberrant mRNAs harboring premature termination codons. NMD targets only mRNAs bound by the nuclear cap-binding protein complex CBP80/20 which directs the pioneer round of translation. Here we demonstrate that NMD occurs efficiently during prolonged hypoxia in which steady-state translation is drastically inhibited. Accordingly, CBP80 remains in the nucleus, and processing bodies are unaffected with regard to their abundance and number under prolonged hypoxic conditions. These results indicate that mRNAs enter the pioneer round of translation during prolonged hypoxia.
- Subjects
MESSENGER RNA; METHYL aspartate; CELL nuclei; HYPOXEMIA
- Publication
FEBS Letters, 2007, Vol 581, Issue 26, p5158
- ISSN
0014-5793
- Publication type
Article
- DOI
10.1016/j.febslet.2007.10.002