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New study: "fossils" of viruses in mammals have potential uses |
Xinhua News Agency, Beijing, September 14th.
"Reference News" published a report on the "Australian Science Warning Website" on the 14th that "mammal DNA carries a large number of virus "fossils", and they may play an important role
.
" The summary is as follows:
A large part of the human body's deoxyribonucleic acid (DNA) library is made up of non-coding genes
.
For a long time, these non-coding genes were considered "junk DNA"
Some of the genetic sequences that were once considered "junk" are actually virus fragments left in their DNA by our distant ancestors after being infected by the virus
.
These viral fragments are called "endogenous viral components" (EVE)
Paleovirologist Emma Harding and colleagues searched for EVE in the genomes of 13 species of marsupial mammals
.
These animals include tamar wallabies, tasmants, and fat-tailed kangaroos
It is already known that this type of RNA is used to perform a variety of cellular functions, including regulating the production of RNA, and also help plants and invertebrates to resist viruses
.
The researchers observed koalas in detail and found that some EVE was actually transcribed into small RNA molecules
Harding said: "This may be a mechanism similar to vaccination, but it is passed down from generation to generation
.
By preserving the virus'fossils', cells can be immune to future infections