“The team also found that the Rps23r1 gene, whose human counterpart has not yet been identified, was created through a process called retroposition, in which a gene is duplicated through the reverse transcription (or reading) of mRNA and the duplicate is placed in a different location in the cell's DNA.”
“The authors also reported that the mouse Rps23r1 gene, whose human counterpart has not yet been identified, was created during evolution through a process called retroposition, in which a gene is "duplicated" through the reverse transcription of mRNA and the "duplicate" is placed in a different location in the cell's DNA.”
“By duplication, amplification, recombination, retroposition, and similar mechanisms, nuons can give rise to “potonuons,” that is, entities potentially recruitable as new nuons.”
“Briefly, the various mechanisms discussed in the review include exon shuffling, gene duplication, retroposition, recruitment of mobile element sequences, lateral gene transfer, gene fusion, and de novo origination.”
“For example, when a retroposition occurs, it is the result of reverse transcription, not some arbitrary, accidental happenstance.”
“They include exon shuffling, gene duplication, retroposition, transposable elements, lateral gene transfer, gene fusion/fission and coding regions arising de novo from non-coding regions.”
“Does retroposition occur independently of reverse transcription?”
“So much so, in fact, that the incidence of “retroposition” – this copying of a gene to another location via mRNA – seems to have increased dramatically, most notably in the primates, including humans.”
“This is after the primate-mouse split, and is consistent with a burst of retroposition occurring in primates at about that time.”
“As I understand it, the authors use this to locate the peak of a burst of retroposition about 38 to 50 MYA.”
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