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- W2081978050 endingPage "1080" @default.
- W2081978050 startingPage "1072" @default.
- W2081978050 abstract "Detection and repair of DNA damage is essential in all organisms and depends on the ability of proteins recognizing and processing specific DNA substrates. In E. coli, the RecA protein forms a filament on single-stranded DNA (ssDNA) produced by DNA damage and induces the SOS response. Previous work has shown that one type of recA mutation (e.g., recA4162 (I298V)) and one type of uvrD mutation (e.g., uvrD303 (D403A, D404A)) can differentially decrease SOS expression depending on the type of inducing treatments (UV damage versus RecA mutants that constitutively express SOS). Here it is tested using other SOS inducing conditions if there is a general feature of ssDNA generated during these treatments that allows recA4162 and uvrD303 to decrease SOS expression. The SOS inducing conditions tested include growing cells containing temperature-sensitive DNA replication mutations (dnaE486, dnaG2903, dnaN159, dnaZ2016 (at 37°C)), a del(polA)501 mutation and induction of Double-Strand Breaks (DSBs). uvrD303 could decrease SOS expression under all conditions, while recA4162 could decrease SOS expression under all conditions except in the polA strain or when DSBs occur. It is hypothesized that recA4162 suppresses SOS expression best when the ssDNA occurs at a gap and that uvrD303 is able to decrease SOS expression when the ssDNA is either at a gap or when it is generated at a DSB (but does so better at a gap)." @default.
- W2081978050 created "2016-06-24" @default.
- W2081978050 creator A5068102775 @default.
- W2081978050 creator A5082841803 @default.
- W2081978050 date "2013-12-01" @default.
- W2081978050 modified "2023-10-03" @default.
- W2081978050 title "Specificity in suppression of SOS expression by recA4162 and uvrD303" @default.
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- W2081978050 doi "https://doi.org/10.1016/j.dnarep.2013.09.003" @default.