Medical Daily: Researchers discover how key enzyme repairs sun-damaged DNA
Medical Daily: Researchers discover how key enzyme repairs sun-damaged DNA
"Researchers have long known that humans lack a key enzyme -- one possessed by most of the animal kingdom and even plants -- that reverses severe sun damage.
"For the first time, researchers have witnessed how this enzyme works at the atomic level to repair sun-damaged DNA.
"The discovery holds promise for future sunburn remedies and skin cancer prevention.
"In the early online edition of the journal Nature, Ohio State University physicist and chemist Dongping Zhong and his colleagues describe how they were able to observe the enzyme, called photolyase, inject a single electron and proton into an injured strand of DNA. The two subatomic particles healed the damage in a few billionths of a second."
My personal theory is that animals that lacked this protection from the sun were therefore genetically more sensitive to changes in inbound sunlight. When the inbound UV of the planet changes, the rate of genetic mutation of these creatures increases, causing the rate of change of their species to increase, conferring it a survival advantage by mutating faster than other species to cope with the environmental changes induced by change in UV.
I call this the "increasing rate of evolution as a a response to changes in global sunlight levels." This theory is based on three highly controversial theories about evolution:
1) environmental changes can increase rate of mutation
2) evolution has selected for species who can most effectively increase their rate of mutation in the presence of environmental changes that affect their survival
3) major evolutionary changes therefore tend to take place when species are confronted with major global environmental changes
"Researchers have long known that humans lack a key enzyme -- one possessed by most of the animal kingdom and even plants -- that reverses severe sun damage.
"For the first time, researchers have witnessed how this enzyme works at the atomic level to repair sun-damaged DNA.
"The discovery holds promise for future sunburn remedies and skin cancer prevention.
"In the early online edition of the journal Nature, Ohio State University physicist and chemist Dongping Zhong and his colleagues describe how they were able to observe the enzyme, called photolyase, inject a single electron and proton into an injured strand of DNA. The two subatomic particles healed the damage in a few billionths of a second."
My personal theory is that animals that lacked this protection from the sun were therefore genetically more sensitive to changes in inbound sunlight. When the inbound UV of the planet changes, the rate of genetic mutation of these creatures increases, causing the rate of change of their species to increase, conferring it a survival advantage by mutating faster than other species to cope with the environmental changes induced by change in UV.
I call this the "increasing rate of evolution as a a response to changes in global sunlight levels." This theory is based on three highly controversial theories about evolution:
1) environmental changes can increase rate of mutation
2) evolution has selected for species who can most effectively increase their rate of mutation in the presence of environmental changes that affect their survival
3) major evolutionary changes therefore tend to take place when species are confronted with major global environmental changes
posted by IdeaMan at 7:08 AM
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