Format

Send to

Choose Destination
Mol Cell. 2012 May 25;46(4):518-29. doi: 10.1016/j.molcel.2012.03.013. Epub 2012 Apr 11.

Dom34:hbs1 plays a general role in quality-control systems by dissociation of a stalled ribosome at the 3' end of aberrant mRNA.

Author information

1
Graduate School of Pharmaceutical Science, Tohoku University, Sendai, Japan.

Abstract

Translation arrest leads to an endonucleolytic cleavage of mRNA that is termed no-go decay (NGD). It has been reported that the Dom34:Hbs1 complex stimulates this endonucleolytic cleavage of mRNA induced by translation arrest in vivo and dissociates subunits of a stalled ribosome in vitro. Here we report that Dom34:Hbs1 dissociates the subunits of a ribosome that is stalled at the 3' end of mRNA in vivo, and has a crucial role in both NGD and nonstop decay. Dom34:Hbs1-mediated dissociation of a ribosome that is stalled at the 3' end of mRNA is required for degradation of a 5'-NGD intermediate. Dom34:Hbs1 facilitates the decay of nonstop mRNAs from the 3' end by exosomes and is required for the complete degradation of nonstop mRNA decay intermediates. We propose that Dom34:Hbs1 stimulates degradation of the 5'-NGD intermediate and of nonstop mRNA by dissociating the ribosome that is stalled at the 3' end of the mRNA.

PMID:
22503425
DOI:
10.1016/j.molcel.2012.03.013
[Indexed for MEDLINE]
Free full text

Publication type, MeSH terms, Substances

Publication type

MeSH terms

Substances

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center