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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →BC200, a noncoding RNA gene associated with neuronal translation, has retained the ability to move to new DNA locations. A study published in Science reports two BC200 insertions in molluscum contagiosum virus (MCV), a human poxvirus. The authors propose that LINE-1 machinery carried the sequence into the virus during modern human history, but that route is an inference—not a directly observed transfer.
What is the BC200 gene?
BC200 is a noncoding RNA gene: it produces an RNA molecule rather than a protein. It is associated with regulation of neuronal translation, the process cells use to make proteins. The study says BC200 was co-opted for this cellular role about 40 million years ago, yet it continued to generate mobile copies.
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That combination is the striking part of the finding. BC200 can have a function in human cells and still retain the capacity to move or copy its sequence. This does not mean every BC200 copy is active, or that all genes descended from mobile elements remain mobile.
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What did scientists find in the virus?
Gao, Pritham, Feschotte and Sun report two BC200 insertions in the genome of molluscum contagiosum virus, which infects humans. They also describe BC200-derived insertions across anthropoid evolution, numbering in the hundreds of lineage-specific insertions, as well as insertion differences among humans, including individual-specific insertions. Those human genomic patterns are evidence that BC200-related transposition has not been limited to the distant past.
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The virus finding is a genomic observation: BC200 sequence is present in MCV. The authors’ explanation for how it arrived there is less certain.
How can a human gene jump through DNA?
“Jumping” does not mean the gene moves around like a living organism. A transposable element is a DNA-derived sequence that can be copied or moved to a new genomic location. LINE-1, often shortened to L1, is a mobile element whose machinery can help other sequences retrotranspose—that is, make a new DNA copy from an RNA intermediate.
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The authors propose that L1-mediated retrotransposition enabled BC200 to enter MCV during modern human history. Cornell’s account says the researchers think the event may have happened while the virus infected skin cells. The available evidence supports this as a likely mechanism, not a proven transmission history or a witnessed event.
Does the discovery mean BC200 causes Alzheimer’s or cancer?
No. The finding does not show that BC200 mobility causes Alzheimer’s disease, cancer or another illness. Cornell’s coverage notes reports of abnormal BC200 expression in some tumors and elevated levels in brains of people with Alzheimer’s disease, but these associations do not establish that BC200 causes either condition. Whether BC200 has a role in disease remains an open question.
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Why can BC200 have a cell function and remain mobile?
BC200 began as a sequence derived from a mobile element and was later co-opted for a cellular role. The study’s interpretation is that evolution did not eliminate its capacity to mobilize while BC200 acquired its role in neuronal translation. Senior author Cedric Feschotte described the two properties as having persisted together: “Somehow evolution hasn’t been able to untangle these two things.”
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.About the study
Gao, Pritham, Feschotte and Sun published “Escape of the BC200 gene to a human poxvirus reveals its persistent transposition in primates” in Science on September 24, 2026 (volume 393, issue 6818, pages 1342–1346; DOI 10.1126/science.aeh3441). The abstract reports the principal findings and interpretation; detailed methods and figures are not described here.
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