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Biochemistry

Washington University in St. Louis

2018

DNA photochemistry

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Effect Of Dna Sequence Context, Dna Structure, And Excitation Method On Cyclobutane Pyrimidine Dimer Formation, Chen Lu May 2018

Effect Of Dna Sequence Context, Dna Structure, And Excitation Method On Cyclobutane Pyrimidine Dimer Formation, Chen Lu

Arts & Sciences Electronic Theses and Dissertations

The cis-syn cyclobutane pyrimdine dimer (CPD) is the major photoproduct resulting from UV irradiation of duplex DNA that results in C to T mutations found in human skin. CPDs with the anti stereochemistry were recently discovered to be formed in human telomeric DNA that adopts a quadruplex structure in vitro and may also play a role in the effects of sunlight in vivo. In this thesis, the effect of telomeric DNA structure on the formation of the anti-CPDs is investigated, as well as the effect of sequence context on cis-syn CPD formation which could help explain the origin of DNA …