The Shwachman-Bodian-Diamond syndrome protein mediates translational activation of ribosomes in yeast.
The autosomal recessive disorder Shwachman-Diamond syndrome, characterized by bone marrow failure and leukemia predisposition, is caused by deficiency of the highly conserved Shwachman-Bodian-Diamond syndrome (SBDS) protein. Here, we identify the function of the yeast SBDS ortholog Sdo1, showing that it is critical for the release and recycling of the nucleolar shuttling factor Tif6 from pre-60S ribosomes, a key step in 60S maturation and translational activation of ribosomes. Using genome-wide synthetic genetic array mapping, we identified multiple TIF6 gain-of-function alleles that suppressed the pre-60S nuclear export defects and cytoplasmic mislocalization of Tif6 observed in sdo1Delta cells. Sdo1 appears to function within a pathway containing elongation factor-like 1, and together they control translational activation of ribosomes. Thus, our data link defective late 60S ribosomal subunit maturation to an inherited bone marrow failure syndrome associated with leukemia predisposition.
Menne
Tobias F
TF
Medical Research Council (MRC) Laboratory of Molecular Biology, Hills Road, Cambridge CB2 0QH, UK.
Goyenechea
Beatriz
B
Sánchez-Puig
Nuria
N
Wong
Chi C
CC
Tonkin
Louise M
LM
Ancliff
Philip J
PJ
Brost
Renée L
RL
Costanzo
Michael
M
Boone
Charles
C
Warren
Alan J
AJ
D002352:Carrier Proteins / Q000235:genetics; D020558:GTP Phosphohydrolases / Q000235:genetics / Q000502:physiology; D017353:Gene Deletion; D007381:Intermediate Filament Proteins / Q000235:genetics; D008954:Models, Biological; D008958:Models, Molecular; D009154:Mutation; D030781:Organisms, Genetically Modified; D010445:Peptide Elongation Factors / Q000235:genetics / Q000502:physiology; D010750:Phosphoproteins / Q000235:genetics; D014176:Protein Biosynthesis / Q000187:drug effects / Q000235:genetics*; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D012269:Ribosomal Proteins; D012270:Ribosomes / Q000378:metabolism*; D012441:Saccharomyces cerevisiae / Q000235:genetics* / Q000254:growth & development; D029701:Saccharomyces cerevisiae Proteins / Q000235:genetics / Q000502:physiology*
D002352:Carrier Proteins; D007381:Intermediate Filament Proteins; D010445:Peptide Elongation Factors; D010750:Phosphoproteins; D011500:Protein Synthesis Inhibitors; D012269:Ribosomal Proteins; D029701:Saccharomyces cerevisiae Proteins; C520002:Sdo1 protein, S cerevisiae; C491609:TIF6 protein, S cerevisiae; D020558:GTP Phosphohydrolases; C520003:RIA1 protein, S cerevisiae