Biological Complexity (Article)

Biological Complexity Continues to Astound   11/03/2008    
Nov 3, 2008 — There’s more going on in your thinking apparatus than you think.  New scientific discoveries continue to unfold new layers of complexity and control.  Here are a few examples:

  1. Meta-code:  Your body has codes directing codes.  Geneticists were initially dismayed to find only 20,000 to 30,000 genes in the human genome.  “We were expecting that something as sophisticated, complex and intelligent as ourselves would have about a hundred thousand genes at least,” said one geneticists quoted in Nature News.  Something has happened since, “restoring the dignity of complexity to the human genome.”  It’s called alternative splicing.  A given gene can produce multiple RNA transcripts, depending on how the pieces are assembled.  These, in turn, can produce vary different protein machines: “This process, called alternative splicing, can produce mRNA molecules and proteins with dramatically different functions, despite being formed from the same gene.”  The report on Science Daily that two proteins coming from the same gene can have opposite functions, depending on how they are spliced and in what cells they are expressed.
        The potential for expansion of the DNA code is huge; one gene in fruit flies, reported Nature News, is thought to generate over 38,000 protein products.  Only about 6% of human genes, it turns out, produce a transcript from a linear strand of DNA.  Most others put together parts from different locations on the chromosome.  With alternative splicing, it’s possible that dozens, or hundreds, or thousands of different products can be produced from the same gene.  This begs another question: what code is directing the assembly of these pieces of DNA code?
  2. Motor memory:  Your long-term memory may depend on little cellular trucks that run on cellular highways.  These trucks haul neurotransmitters to the junctions between neurons, keeping the junctions active.  Read all about Science Now.  This begs a question: who is the dispatcher?
  3. Rewind repair:  Another molecular machine has been discovered that fixes unwound DNA.  “When your DNA gets stuck in the unwound position,” an article on Science Daily says, “your cells are in big trouble, and in humans, that ultimately leads to death.”  This “rewinding machine” takes a damaged portion of DNA and rewinds it into the familiar double helix.  In effect, it does the opposite of the helicase machine that unwinds DNA for transcribing.  The machine, named HARP, uses ATP, the universal energy currency of the cell.
        The UCSD scientists were “astounded” to find out how this little machine works.  “It didn’t occur to us that such enzymes even existed,” they said.  “In fact, we never knew until now what happened to DNA when it got stuck in the unwound position.”  Good thing the machine knows what to do.  Failure to heal unwound DNA leads to fatal diseases; yet it cannot interfere with the other helicases that legitimately unwind DNA for transcription.  This begs another question, though: what tells this machine where the damage is and how to fix it?

The last article said that the discovery is spurring the scientists to look for more DNA-healing machines.  Here was a whole class of proteins they didn’t even know about.  “This will open up a whole new area of study,” said one team member.  “There are very few enzymes known that alter DNA structure.  And we’ve discovered an entirely new one.  This was not expected to happen in the year 2008.  We should have found them all by now.”  Young scientists should take encouragement: “The field potentially can be fairly large.  And as more and more people discover additional annealing helicases, this field will expand.”
    The palpable excitement in their tone required a look at the original paper in Science.1  Yusufzai and Kadonaga called their machine a “molecular zipper” and said, “the pleiotropy of HARP mutations is consistent with the function of HARP as an annealing helicase that acts throughout the genome to oppose the action of DNA-unwinding activities in the nucleus.”  By pleiotropy, they mean that mutated HARP genes can cause problems all over the place.  They identified one disease, SIOD (Schimke immuno-osseous dysplasia), that can actually be traced to mutations in HARP.  The genetic disorder leads to dwarfism, a damaged immune system and early death.
    The HARP machine is ubiquitous in the nucleus, they said, because the possibilities for DNA winding errors are ubiquitous.  Helicases might fail, or bubbles in double-stranded DNA might form spontaneously.  Without repair machinery available, the DNA transcribing and duplicating machines could fail.  “In this manner, HARP would be able to promote the proper functioning of the cell by catalyzing the rewinding of the stably unwound DNA,” their paper ended.  “More generally, HARP would serve as an opposing force to the numerous DNA-unwinding activities in the nucleus.”

1.  Timur Yusufzai and James T. Kadonaga, “HARP Is an ATP-Driven Annealing Helicase,” Science, 31 October 2008: Vol. 322. no. 5902, pp. 748-750, DOI: 10.1126/science.1161233.

None of these articles needed, referred to, or owed anything to evolutionary theory.  This was the good old science at work: uncovering the mechanisms of the world, as if it were designed, and seeking to understand the workings of nature.  In fact, the third article says this: “The discovery represents the first time scientists have identified a motor protein specifically designed to prevent the accumulation of bubbles of unwound DNA.”  If that does not presuppose intelligent design, what does?  And how did cells get along before chance found a way to invent a powered repair machine for DNA?
    Earlier scientists like Leeuwenhoek and Pasteur would have been pleased and thrilled to learn about the levels of complexity being revealed in the cells they only knew as black boxes.  There is plenty of work for design-motivated scientists to discover.  We will all benefit from their grand openings of the black box.
Next headline on:  Human BodyGeneticsCell Biology

Tip Link:  Is natural selection natural?  Neil Broom, a biomaterials researcher at University of Auckland, argues it isn’t.  In a penetrating essay on Metanexus, “Does Nature Suggest Transcendence?”, he shows how materialists unintentionally sneak intentionality into their supposedly materialistic explanations.    Excerpt:

I think it is fair to say that at one popular level the expression natural selection serves as a kind of mantra, an almost magical utterance that quickly allays any doubts a skeptic might entertain.  It is uttered with power and authority when any kind of biological achievement required to be explained, and in the currency of a wholly material world.  My argument is that the claim that natural selection explains the extraordinary (read life processes) while drawing only on the ordinary (read material processes), is not only bad science, it is also contradicted by the very narrative the materialist seems compelled to employ to present his or her story of life.


5 Responses to “Biological Complexity (Article)”

  1. Intelligent Desige at it’s best!

  2. I would rather say that being humans, we tend to want to ascribe a reason to everything with the logic that if you can explain why such and such occurs, you possess power over the thing itself–to destroy it, modify or make a new one.

  3. Oh and by the way, I believe that you don’t need an omnipresent Creator to make all of what we see. What you need is time, and the laws of natural selection and speciation. See #14 in this article for the refutation.

  4. ArianneG,

    I think you got the link. But Illl post it again since the 15 answers link. If you want me to read te link then you have to be willing to read this link.
    A Critique of Douglas Theobald’s
    “29 Evidences for Macroevolution”

  5. “All you need is time”

    It’s philosophical, time doesn’t have any explanitory scope. Time doesn’t explain how DNA can form without protein and vice versa. They can’t and never will be able to show how life orginated and it wasn’t all natural and yes you do need intelligence it’s God’s intelligence.

    Like the Bible says, the Heavens declare the Glory of God. Go and find what this means, a familiar phrase Jesus used.

Leave a Reply

Fill in your details below or click an icon to log in: Logo

You are commenting using your account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: