Document Detail

Distinct modes of DNA damage response in S. pombe G0 and vegetative cells.
MedLine Citation:
PMID:  16371129     Owner:  NLM     Status:  MEDLINE    
Upon nitrogen-starvation, mostly G2 vegetative (VE) fission yeast cells promote two rounds of division and enter the G0 state with 1C DNA via an uncommitted G1. Whilst G0 cells are permanently arrested, they keep viability through recycling the intracellular nitrogen. We here show that, whilst the DNA damages are efficiently repaired in G0 cells, neither Chk1 activation nor Cdc2 implication for Crb2 (53BP1 like) do not occur. ATR-like Rad3 and non-hyperphosphorylated Crb2 participate the repair processes in G0 cells that are more sensitive to UV and gamma-ray than in VE cells. The sensitivity like in VE cells is restored after replication in the nitrogen-replenished medium, suggesting that the damage hyper-sensitive nature of G0 cells is due to the error-prone repair for single DNA duplex chromosome. The double-strand break (DSB) repair in G0 cells required Pku80, one of non-homologous end joining (NHEJ) proteins. S. pombe G0 cells upon DNA damages thus respond distinctively from VE cells in regard with regulation of checkpoint proteins and the mode of repair that is dependent upon the use of NHEJ.
Satoru Mochida; Mitsuhiro Yanagida
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Genes to cells : devoted to molecular & cellular mechanisms     Volume:  11     ISSN:  1356-9597     ISO Abbreviation:  Genes Cells     Publication Date:  2006 Jan 
Date Detail:
Created Date:  2005-12-22     Completed Date:  2006-05-03     Revised Date:  2011-11-02    
Medline Journal Info:
Nlm Unique ID:  9607379     Medline TA:  Genes Cells     Country:  England    
Other Details:
Languages:  eng     Pagination:  13-27     Citation Subset:  IM    
The G0 Cell Unit, Initial Research Project (IRP), Okinawa Institute of Science and Technology (OIST) Corporation, 12-22 Suzaki, Uruma, Okinawa 904-2234, Japan.
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MeSH Terms
Bacterial Proteins / chemistry,  genetics
Cell Cycle Proteins / chemistry,  genetics
DNA Damage*
DNA Replication
G0 Phase / radiation effects*
Gamma Rays*
Glucose / physiology
Luminescent Proteins / chemistry,  genetics
Nitrogen / metabolism
Nuclear Proteins / chemistry,  genetics
Protein Kinases / physiology
Schizosaccharomyces / cytology*,  growth & development,  radiation effects*
Schizosaccharomyces pombe Proteins / chemistry,  genetics
Sulfur / physiology
Thymine / chemistry
Ultraviolet Rays*
Reg. No./Substance:
0/Bacterial Proteins; 0/Cell Cycle Proteins; 0/Luminescent Proteins; 0/Nuclear Proteins; 0/RHP9 protein, S pombe; 0/Schizosaccharomyces pombe Proteins; 0/yellow fluorescent protein, Bacteria; 50-99-7/Glucose; 65-71-4/Thymine; 7704-34-9/Sulfur; 7727-37-9/Nitrogen; EC 2.7.-/Protein Kinases; EC kinase 1

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