Scientists identify gene enabling human brain DNA to jump.

Scientists have identified a human gene that can still hop around the genome, a discovery reported today by ScienceDaily. The gene, known as BC200, was found to retain the ability to move despite also performing a critical function in brain cells. Researchers traced the gene’s activity to both normal human tissue and a human poxvirus, suggesting it can jump from infected skin cells into viral DNA.

The finding comes as researchers revisit the role of transposons—segments of DNA that can relocate themselves—in shaping the human genome. While most transposon‑derived genes lose their mobility over millions of years, BC200 appears to be an exception. It originated from a mobile element that entered the human lineage several million years ago, yet it never gave up its jumping capacity. Scientists say the renewed interest in these “jumping genes” is driven by advances in genome sequencing that allow them to spot rare events that were previously invisible.

BC200 is most active in neurons, where it helps regulate the production of proteins essential for brain function. In laboratory experiments, the team observed the gene embedded within the genome of a human poxvirus, a virus that infects skin cells. This suggests the gene can transfer from a host cell into a virus during infection, a route that could spread genetic material in ways not previously documented. The researchers measured the gene’s mobility by tracking its insertion sites and found it still moves at a measurable rate, unlike most other ancient transposon‑derived genes.

The discovery raises questions about how mobile genes might influence health and disease. If BC200 can hop into viral genomes, it could potentially alter viral behavior or trigger immune responses. The team plans to investigate whether the gene’s movement is linked to neurological disorders or to the evolution of human viruses. Understanding BC200’s dual role may open new avenues for treating brain conditions and for designing antiviral strategies that account for hidden genetic exchanges.