Article

Catalase T and Cu,Zn-superoxide dismutase in the acetic acid-induced programmed cell death in Saccharomyces cerevisiae.

Dipartimento di Scienze per la Salute, Università del Molise, Via De Sanctis I, Campobasso, Italy.
FEBS Letters (impact factor: 3.54). 02/2008; 582(2):210-4. DOI:10.1016/j.febslet.2007.12.007
Source: PubMed

ABSTRACT To investigate the role of catalase and superoxide dismutase (SOD) in the acetic acid (AA) induced yeast programmed cell death (AA-PCD), we compared Saccharomyces cerevisiae cells (C-Y) and cells individually over-expressing catalase T (CTT1-Y) and Cu,Zn-SOD (SOD1-Y) with respect to cell survival, hydrogen peroxide (H2O2) levels and enzyme activity as measured up to 200 min after AA treatment. AA-PCD does not occur in CTT1-Y, where H2O2 levels were lower than in C-Y and the over-expressed catalase activity decreased with time. In SOD1-Y, AA-PCD was exacerbated; high H2O2 levels were found, SOD activity increased early, remaining constant en route to AA-PCD, but catalase activity was strongly reduced.

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Keywords

AA
 
AA treatment
 
AA-PCD
 
acetic acid
 
C-Y
 
catalase activity
 
cell death
 
constant en route
 
CTT1-Y
 
enzyme activity
 
H2O2 levels
 
hydrogen peroxide
 
over-expressed catalase activity
 
Saccharomyces cerevisiae cells
 
SOD
 
SOD activity
 
SOD1-Y
 
superoxide dismutase