Abstract:
:The effects of overexpression of the apurinic/apyrimidinic DNA endonuclease Nfo on wet and dry heat and UV-C (254 nm) resistance of Bacillus subtilis spores with or without alpha/beta-type small, acid-soluble spore proteins (SASP) were determined. Results revealed that overexpression of Nfo > or =50-fold in spores increased the wet heat resistance of exoA nfo B. subtilis spores (termed alpha(-)beta(-)) that lack most alpha/beta-type SASP, but had no effect on these spores' UV-C resistance. Nfo overexpression also increased these spores' dry heat resistance, and to levels slightly greater than that of wild-type spores. These results are consistent: (1) with wet and dry heat (but not UV-C) generating abasic sites in alpha(-)beta(-) spore DNA; (2) with dry heat generating some of these lesions in spores that retain alpha/beta-type SASP; and (3) indicate that Nfo can repair these abasic lesions following spore germination.
journal_name
FEMS Microbiol Lettjournal_title
FEMS microbiology lettersauthors
Barraza-Salas M,Ibarra-Rodríguez JR,Mellado SJ,Salas-Pacheco JM,Setlow P,Pedraza-Reyes Mdoi
10.1111/j.1574-6968.2009.01845.xsubject
Has Abstractpub_date
2010-01-01 00:00:00pages
159-65issue
2eissn
0378-1097issn
1574-6968pii
FML1845journal_volume
302pub_type
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