Document Detail


Acidic stress induces the formation of P-bodies but not stress granules with mild attenuation of bulk translation in Saccharomyces cerevisiae.
MedLine Citation:
PMID:  22686455     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
The stress response of eukaryotic cells often causes an attenuation of bulk translation activity and the accumulation of non-translating mRNAs into cytoplasmic mRNP granules termed cytoplasmic processing bodies (P-bodies) and stress granules (SGs). We examined effects of acidic stress on the formation of mRNP granules compared with other forms of stress such as glucose deprivation and a high Ca2+ level in Saccharomyces cerevisiae. Treatment with lactic acid clearly caused the formation of P-bodies but not SGs, and also caused an attenuation of translation initiation, albeit to a lesser extent than glucose depletion. P-body formation was also induced by hydrochloric acid and sulfuric acid. However, lactic acid in SD media with a pH greater than 3.0, propionic acid, and acetic acid did not induce P-body formation. Our results suggest that the assembly of yeast P-bodies can be induced by external conditions with a low pH and the threshold was around pH 2.5. The P-body formation upon acidic stress required Scd6, a component of P-bodies, indicating that P-bodies induced by acidic stress have rules of assembly different from those induced by glucose deprivation or high Ca2+ levels.
Authors:
Aya Iwaki; Shingo Izawa
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-6-12
Journal Detail:
Title:  The Biochemical journal     Volume:  -     ISSN:  1470-8728     ISO Abbreviation:  -     Publication Date:  2012 Jun 
Date Detail:
Created Date:  2012-6-12     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2984726R     Medline TA:  Biochem J     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
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