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Just when we thought we had genetics figured out..

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  • Just when we thought we had genetics figured out..

    ....then we discover this! Ok I saw this posted on another forum and found it very interested. Researchers in Japan and the US discovered a virus that is responsible for 8 percent of human DNA! DNA affected by this virus has been found in animals tested and could be a part of the DNA of all living things. This virus is suspected to cause mutations in living things and could be responsible for mental and health conditions and aspects of evolutions itself! What other morphs and mutations could be caused by these viruses? Very interesting read and it just shows that we are discovering new things about ourselves and life on this planet everyday!

    Evolutionary Surprise: Eight Percent of Human Genetic Material Comes from a Virus

    ScienceDaily (Jan. 8, 2010) — About eight percent of human genetic material comes from a virus and not from our ancestors, according to researchers in Japan and the U.S.

    The study, and an accompanying News & Views article by University of Texas at Arlington biology professor C├ędric Feschotte, is published in the journal Nature.
    The research showed that the genomes of humans and other mammals contain DNA derived from the insertion of bornaviruses, RNA viruses whose replication and transcription takes place in the nucleus. Feschotte wrote on recent research led by Professor Keizo Tomonaga at Osaka University in Japan. Feschotte said this virally transmitted DNA may be a cause of mutation and psychiatric disorders such as schizophrenia and mood disorders.
    In his article, Feschotte speculates about the role of such viral insertions in causing mutations with evolutionary and medical consequences.
    The assimilation of viral sequences into the host genome is a process referred to as endogenization. This occurs when viral DNA integrates into a chromosome of reproductive cells and is subsequently passed from parent to offspring. Until now, retroviruses were the only viruses known to generate such endogenous copies in vertebrates. But Feschotte said that scientists have found that non-retroviral viruses called bornaviruses have been endogenized repeatedly in mammals throughout evolution.
    Bornavirus (BDV) owes its name to the town of Borna, Germany, where a virus epidemic in 1885 wiped out a regiment of cavalry horses. BDV infects a range of birds and mammals, including humans. It is unique because it infects only neurons, establishing a persistent infection in its host's brain, and its entire life cycle takes place in the nucleus of the infected cells. Feschotte said this intimate association of BDV with the cell nucleus prompted researchers to investigate whether bornaviruses may have left behind a record of past infection in the form of endogenous elements. They searched the 234 known eukaryotic genomes (those genomes that have been fully sequenced) for sequences that are similar to that of BDV. "The researchers unearthed a plethora of endogenous Borna-like N (EBLN) elements in many diverse mammals, " Feschotte said.
    The scientists also were able to recover spontaneous BDV insertions in the chromosomes of human cultured cells persistently infected by BVD.Based on these data, Feschotte proposes that BDV insertions could be a source of mutations in the brain cells of infected individuals.
    "These data yield a testable hypothesis for the alleged, but still controversial, causative association of BDV infection with schizophrenia and mood disorders," Feschotte said. The research in Feschotte 's laboratory, which largely focuses on transposable elements, the genetic elements that are able to move and replicate within the genomes of virtually all living organisms, is representative of the research under way at UT Arlington, an institution of 28,000 students on its way to becoming a nationally recognized, top-tier research university.
    Evolutionary surprise: Eight percent of human genetic material comes from a virus

  • #2
    Re: Just when we thought we had genetics figured out..

    I have to read this info later no time right now

    Got a Birthday party to attend

    who's ........ my sisters and mine , ha ha

    Lar M
    Boas By Klevitz

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    • #3
      Re: Just when we thought we had genetics figured out..

      Originally posted by Boa Amarali View Post
      I have to read this info later no time right now

      Got a Birthday party to attend

      who's ........ my sisters and mine , ha ha
      Have fun with the party! Wait...are you a twin or are the dates just real close??

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