DNA protection during starvation protein 1

UniProtKB accession:  Q9RS64

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UniProtKB description:  Protects DNA from oxidative damage by sequestering intracellular Fe(2+) ion and storing it in the form of Fe(3+) oxyhydroxide mineral. One hydrogen peroxide oxidizes two Fe(2+) ions, which prevents hydroxyl radical production by the Fenton reaction (By similarity). Both oligomeric forms of dps exhibit ferroxidase activity and DNA binding. Dodecameric dps is capable of Fe(2+) oxidation/mineralization. Only dimeric dps affords efficient DNA protection against hydroxyl radical-mediated cleavage.