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New Look At DNA Hints At Origin Of Ultraviolet Damage

Date:
August 29, 2005
Source:
Ohio State University
Summary:
Chemists at Ohio State University have gained new insight into how sunlight affects DNA. And what they found overturns ideas about genetic mutation that originated decades ago. In the current issue of the journal Nature, Bern Kohler and his colleagues report that DNA dissipates the energy from ultraviolet (UV) radiation in a kind of energy wave that travels up the edge of the DNA molecule, as if the energy were climbing one side of the helical DNA "ladder."

This picture shows how DNA bases are stacked together along the double helix. The atoms of the sugar-phosphate backbone are shown in gray, and the ultraviolet-absorbing portions of DNA -- the bases -- are shown in blue or magenta, depending on which side of the DNA strand they are located.
Credit: Image courtesy of Bern Kohler, Ohio State University

COLUMBUS , Ohio – Chemists at Ohio State University have gained new insight into how sunlight affects DNA. And what they found overturns ideas about genetic mutation that originated decades ago.


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The above story is based on materials provided by Ohio State University. Note: Materials may be edited for content and length.


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Ohio State University. "New Look At DNA Hints At Origin Of Ultraviolet Damage." ScienceDaily. ScienceDaily, 29 August 2005. <www.sciencedaily.com/releases/2005/08/050826081430.htm>.
Ohio State University. (2005, August 29). New Look At DNA Hints At Origin Of Ultraviolet Damage. ScienceDaily. Retrieved April 24, 2014 from www.sciencedaily.com/releases/2005/08/050826081430.htm
Ohio State University. "New Look At DNA Hints At Origin Of Ultraviolet Damage." ScienceDaily. www.sciencedaily.com/releases/2005/08/050826081430.htm (accessed April 24, 2014).

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