If you do a search on our website for ‘DNA repair’ you will find several articles that describe different methods of repairing DNA. DNA by itself is a very remarkable molecule, but to consider that it comes with its own repair kits makes it even more of an enigma for evolutionists.
Now, Clemson biologists have discovered yet another DNA repair mechanism. This newly identified repair kit works with a process called deamination. This is when three of the four base units (A, C, or G) become damaged or modified via chemical processes. When this happens it can cause a significant change to the base unit for example, the deamination of C will generate U (uracil). Even though the C originally paired with G, the U replacement pairs with A, thus changing both base units. As you can imagine, this can result in harmful mutations.
Cells contain an enzyme known as uracil DNA glycosylase (UDG) which moves along the DNA and removes the uracil base created by deamination. This has been a well-known repair mechanism.
The Clemson team discovered another enzyme in the same group as those that repair uracil damage, but this one works differently than the others. Instead of repairing the uracil (U), this new group of enzymes works on repairing the A (adenine) that resulted in the deamination of C (cytosine). According to Dr. Weiguo Cao, the lead biochemist on the team:
What we learned from this work is that DNA repair toolkits have an amazing ability to evolve different repair functions for different kinds of DNA damage.
In our Simple Cell Series, we demonstrated over and over just how complex and marvelously designed the cell really is. There is nothing simple about it. Down to the molecular level, every detail is precisely choreographed in a way that defies any possibility of being attributed to mere random chance. The inner workings of the simple cell and all of its exquisite features such as multiple DNA repair kits, are truly a testimony to the omniscience, omnipresence, and omnipotence of our Creator God.
Biochemists Identify New Genetic Code Repair Tool, Science Daily,Sept. 27, 2011.
Is life on Earth the product of purely undirected processes like time, chance and natural selection? Or, can the origin and diversity of living organisms be traced to an intelligent cause?
Unlocking the Mystery of Life explores these timeless questions and presents compelling evidence to support an idea that could revolutionize scientific thought – “the theory of intelligent design.”