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DNA repair by photolyases
How photolyase enzymes fix DNA damage caused by light
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Abstract
Photolyases repair UV-induced DNA damage using blue light and may consist of more classes than previously recognized.
- Photolyases belong to the cryptochrome/photolyase protein family and perform various functions, including DNA repair.
- They specifically target cyclobutane pyrimidine dimers and pyrimidine-pyrimidone photoproducts caused by UV exposure.
- Photolyases utilize blue light as an energy source for repairing DNA damage.
- The enzyme contains two chromophores: flavin adenine dinucleotide (FAD) for catalysis and another that absorbs blue light to enhance repair efficiency.
- Phylogenetic analysis suggests that the diversity of photolyase classes is greater than previously acknowledged.
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