9yup

Structural highlights

Function

PPRA_DEIRA dsDNA-binding protein that contributes to the ionizing radiation resistance of D.radiodurans. Plays a role in DNA repair and genome reconstitution, and is necessary for recovery from severe genomic fragmentation as a result of exposure to severe levels of ionizing radiation. In vitro, binds to double-stranded DNA carrying strand breaks and stimulates the DNA end-joining reaction catalyzed by DNA ligases. Thus, PprA plays a critical role in a non-homologous end-joining (NHEJ) pathway for the repair of radiation-induced DNA double-strands breaks. Cannot bind to dsDNA without strand breaks or single-stranded DNA.^{[1] [2]}

References

1. ↑ Tanaka M, Earl AM, Howell HA, Park MJ, Eisen JA, Peterson SN, Battista JR. Analysis of Deinococcus radiodurans's transcriptional response to ionizing radiation and desiccation reveals novel proteins that contribute to extreme radioresistance. Genetics. 2004 Sep;168(1):21-33. PMID:15454524 doi:http://dx.doi.org/10.1534/genetics.104.029249
2. ↑ Narumi I, Satoh K, Cui S, Funayama T, Kitayama S, Watanabe H. PprA: a novel protein from Deinococcus radiodurans that stimulates DNA ligation. Mol Microbiol. 2004 Oct;54(1):278-85. doi: 10.1111/j.1365-2958.2004.04272.x. PMID:15458422 doi:http://dx.doi.org/10.1111/j.1365-2958.2004.04272.x