A Minor Genetic Mutation Explains the Transmission of Viruses from Bats to Humans
The website SciTechDaily published a report on a new scientific study that revealed a very small genetic change may be responsible for the ability of bat viruses to infect human cells, marking a crucial step toward understanding the mechanism by which animal viruses transform into global epidemic threats.
The report stated that researchers at the University of California and the University of Glasgow focused specifically on coronaviruses and found that a single mutation in the virus’s surface “spike” protein is sufficient to alter its ability to bind to and penetrate receptors on the surface of human cells.
• The specific mutation affects a region known as the “furin cleavage site” in the spike protein, a region that allows the virus to fuse with the membrane of the targeted cell after binding to it.
• The presence of this mutation in bat viruses enables them to utilize human enzymes found in the respiratory tract to activate the protein, thereby transforming the virus from a dormant state in bats into a potential killer in humans.
• The discovered mechanism is not limited to the SARS-CoV-2 virus, which caused the COVID-19 pandemic, but applies to a wide range of coronaviruses circulating in bat colonies around the world.
Researchers emphasized that understanding this mechanism at the precise molecular level enables scientists to develop early warning systems that monitor viruses in bats and detect mutations that render them capable of infecting humans before they evolve into pandemics, representing a paradigm shift in preventive epidemiology.
The report added that the study also opens the door to developing antiviral drugs that target this critical region of the protein, preventing the virus from entering cells regardless of the strain, which could provide broad-spectrum protection against future coronaviruses.
The report concluded that nature does not require drastic changes to trigger global health disasters; a single mutation in the wrong place is enough. Science is now closer to detecting these mutations before the final chapters of the catastrophe unfold.
