
Mon Jan 15, 2018 01:43 PM
“our neurons use a viral-like gene to transmit genetic information between each other in an oddly virus-like way that, until now, we had no idea about”
“Arc genes are the evolutionary cousins of these viruses, which explains why they produce shells that look so similar. Specifically, Arc is closely related to a viral gene called gag, which retroviruses like HIV use to build the protein shells that enclose their genetic material.”
This is more genetic proof of evolution. Our DNA is littered with the corpses of inactive virii and parts of them have made their way into useful parts of our DNA.
“This is part of a broader trend: Scientists have in recent years discovered several ways that animals have used the properties of virus-related genes to their evolutionary advantage. Gag moves genetic information between cells, so it’s perfect as the basis of a communication system. Viruses use another gene called env to merge with host cells and avoid the immune system. Those same properties are vital for the placenta—a mammalian organ that unites the tissues of mothers and babies. And sure enough, a gene called syncytin, which is essential for the creation of placentas, actually descends from env. Much of our biology turns out to be viral in nature.”
https://www.theatlantic.com/science/archive/2018/01/brain-cells-can-share-information-using-a-gene-that-came-from-viruses/550403/

The Arc gene, which is critical for animals ability to learn from experiences, has an incredible origin story.
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