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PMID:15458422
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| Citation |
Narumi, I, Satoh, K, Cui, S, Funayama, T, Kitayama, S and Watanabe, H (2004) PprA: a novel protein from Deinococcus radiodurans that stimulates DNA ligation. Mol. Microbiol. 54:278-85 |
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| Abstract |
The extraordinary radiation resistance of Deinococcus radiodurans results from the efficient capacity of the bacterium to repair DNA double-strand breaks. By analysing the DNA damage repair-deficient mutant, KH311, a unique radiation-inducible gene (designated pprA) responsible for loss of radiation resistance was identified. Investigations in vitro showed that the gene product of pprA (PprA) preferentially bound to double-stranded DNA carrying strand breaks, inhibited Escherichia coli exonuclease III activity, and stimulated the DNA end-joining reaction catalysed by ATP-dependent and NAD-dependent DNA ligases. These results suggest that D. radiodurans has a radiation-induced non-homologous end-joining repair mechanism in which PprA plays a critical role. |
| Links |
PubMed Online version:10.1111/j.1365-2958.2004.04272.x |
| Keywords |
Amino Acid Sequence; Bacterial Proteins/chemistry; Bacterial Proteins/genetics; Bacterial Proteins/metabolism; Base Sequence; DNA/genetics; DNA/metabolism; DNA Damage; DNA Ligases/genetics; DNA Ligases/metabolism; DNA Repair; DNA, Bacterial/genetics; DNA, Bacterial/metabolism; Deinococcus/genetics; Deinococcus/metabolism; Deinococcus/radiation effects; Gene Expression Regulation, Bacterial; Molecular Sequence Data; Mutation; Rec A Recombinases/metabolism |
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