Dom34:Hbs1 promotes subunit dissociation and peptidyl-tRNA drop-off to initiate no-go decay.
No-go decay (NGD) is one of several messenger RNA (mRNA) surveillance systems dedicated to the removal of defective mRNAs from the available pool. Two interacting factors, Dom34 and Hbs1, are genetically implicated in NGD in yeast. Using a reconstituted yeast translation system, we show that Dom34:Hbs1 interacts with the ribosome to promote subunit dissociation and peptidyl-tRNA drop-off. Our data further indicate that these recycling activities are shared by the homologous translation termination factor complex eRF1:eRF3, suggesting a common ancestral function. Because Dom34:Hbs1 activity exhibits no dependence on either peptide length or A-site codon identity, we propose that this quality-control system functions broadly to recycle ribosomes throughout the translation cycle whenever stalls occur.
Howard Hughes Medical Institute and Department of Molecular Biology and Genetics, Johns Hopkins University School of Medicine, Baltimore, MD 21205, USA.
Christopher J
CJ
Shoemaker
Daniel E
DE
Eyler
Rachel
R
Green
D018797:Cell Cycle Proteins / Q000235:genetics / Q000378:metabolism*; D003062:Codon; D018388:Codon, Terminator; D004722:Endoribonucleases / Q000235:genetics / Q000378:metabolism*; D019204:GTP-Binding Proteins / Q000235:genetics / Q000378:metabolism*; D006160:Guanosine Triphosphate / Q000378:metabolism; D018840:HSP70 Heat-Shock Proteins / Q000235:genetics / Q000378:metabolism*; D007700:Kinetics; D010443:Peptide Chain Termination, Translational; D010445:Peptide Elongation Factors / Q000235:genetics / Q000378:metabolism*; D010454:Peptide Termination Factors / Q000378:metabolism; D014176:Protein Biosynthesis; D020871:RNA Stability; D012331:RNA, Fungal / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism*; D012346:RNA, Transfer, Amino Acyl / Q000235:genetics / Q000378:metabolism*; D011994:Recombinant Proteins / Q000378:metabolism; D054657:Ribosome Subunits / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000378:metabolism; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000378:metabolism*
D018797:Cell Cycle Proteins; D003062:Codon; D018388:Codon, Terminator; C077247:HBS1 protein, S cerevisiae; D018840:HSP70 Heat-Shock Proteins; D010445:Peptide Elongation Factors; D010454:Peptide Termination Factors; D012331:RNA, Fungal; D012333:RNA, Messenger; D012346:RNA, Transfer, Amino Acyl; D011994:Recombinant Proteins; C080775:SUP45 protein, S cerevisiae; D029701:Saccharomyces cerevisiae Proteins; C087971:peptide-chain-release factor 3; C019037:tRNA, peptidyl-; D006160:Guanosine Triphosphate; C112808:Dom34 protein, S cerevisiae; D004722:Endoribonucleases; D019204:GTP-Binding Proteins