Intelligent Design

DNA Methylation in Bacteria

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How do bacteria respond to environmental challenges and signals so quickly and effectively? In addition to genetic modifications there are a series of non genetic, or epigenetic, modifications. Genetic modifications change the sequence of nucleotides that, for instance, comprise a protein-coding gene. In that case the resulting protein is modified to better handle the environmental challenge. Epigenetics, on the other hand, involves various other types of modifications. For instance, the three-dimensional structures of proteins may be dramatically altered, or tiny chemical signals—methyl groups—may be added to certain proteins or DNA sequences. As with genetic modifications, many of the epigenetic modifications are heritable, so the adjustments are passed on to later generations.  Read more

2 Replies to “DNA Methylation in Bacteria

  1. 1
    bornagain77 says:

    While it is interesting that finding higher levels of epigenetic information in the genome that are calculating proper responses to environmental stress does indeed severely undermine the neo-Darwinian assertion that the changes are generated purely by random variation, it is more important to note that all known “calculated adaptations” for bacteria still fall within the domain of Genetic Entropy since the fitness test remains not violated. i.e. the “optimal” genome of the parent bacteria, though sufficient to generate information to properly respond to a given stress, is not sufficient within itself to generate functional information over and above what is present in the parent bacteria. The reason that it is important to note this particular point of evidence for Genetic Entropy, is that I have seen many people fall for what could be called “intelligent evolution” after seeing evidence such as you have cited Dr. Hunter. This is because they do not realize that the calculated adaptation from the higher levels of information in the genomes in reality actually subtracts from overall functionality when compared to parent strain:

    Is Antibiotic Resistance evidence for evolution? – “The Fitness Test” – video
    http://www.metacafe.com/watch/3995248

    Testing the Biological Fitness of Antibiotic Resistant Bacteria – 2008
    http://www.answersingenesis.or.....-drugstore

  2. 2
    Cornelius Hunter says:

    BornAgain77:

    The reason that it is important to note this particular point of evidence for Genetic Entropy, is that I have seen many people fall for what could be called “intelligent evolution” after seeing evidence such as you have cited Dr. Hunter.

    Yes, what I think can be safely said is that the adapatation evidence increases the unlikeliness of evolution to yet higher levels, as it would require incredible good fortune to have created such systems.

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