According tomedia BGR, the time spent on every 1 million new crownconfirmed cases in the world has been shortened recently, from the initial three months to the most recent time of only 8 days. According to real-time statistics released by Johns Hopkins University in the United States, there are now more than 10.39 million confirmed cases of new coronapneumonia worldwide, which has killed more than 508,000 patients. While some countries have been able to flatten the outbreak curve and return to some sense of normalcy, others have yet to contain the first wave of infection. Tens of thousands of new infections are still reported every day in the United States, Brazil and India, according to the latest world health organization (WHO) statistics, with the number of new cases of new pneumonia in the world hitting a new high in a single day.
There is no doubt that there has been a significant increase in testing compared to the months before the outbreak. But the SARS-CoV-2 virus is highly contagious, especially in densely populated communities where people refuse to wear masks by not following the rules of social distance. Now, it turns out that in areas that don’t respect any security measures, the new coronavirus may be due to a small mutation that could make the virus more contagious.
This isn’t the first time we’ve heard of the D614G mutation, which has been detailed in several COVID-19 studies over the past few months. But more researchers believe the mutation is mainly leading to the emergence of an aggressive version of SARS-CoV-2, which is more contagious than the original virus.
As The Washington Post explains, about 1,300 amino acids are part of the protein on the virus’s surface. One of the amino acids has a mutation — number 614 — switching from “D” (datine) to “G” (glycine). This change alone, known as the “G” mutation, may allow the virus to hook up the ACE2 receptor more effectively and bind to cells in the body.
The mutation affects the sting protein (S protein) outside the virus. These prominent structures are the reason why pathogens can hook healthy cells. Once this is done, RNA information in the virus is decoded, cells are “hijacked” and the virus is produced in large quantities. The replication is released from dying cells, a process that repeats.
About 70 percent of the nearly 50,000 viral genomes uploaded online carry G mutations, the Washington Post reported. Four new studies have shown that the mutation makes the virus more contagious, but the work has not been peer-reviewed. A different study says patients infected with the G mutation have more viruses in their bodies, so they are more likely to spread it to others. If the G mutation gives the virus a better chance of hanging on to the cell, the virus may reproduce more easily than version D. The good news is that the G mutation doesn’t make people sick or more deadly. Moreover, so far, this mutation has not hindered vaccine work. It may just make the virus more contagious.
“Epidemiological studies and our data together really explain why (G variants) are spreading really quickly in Europe and the United States,” said Hyeryun Choe, a virologist at the Scripps Institute. “It’s no accident. “
The researchers explained that the original synaptic protein of SARS-CoV-2 has two parts and is not always well combined. The original external part often breaks, which means that the virus is more difficult to infect cells. Choe found that the G-version of the virus is characterized by more stinging proteins, and the external part is less likely to break. This change in laboratory experiments is enough to increase the appeal by a factor of ten.
Although Choe believes that the stingprotein is more stable because of the G mutation, the Sanjana team believes that the mutation helps the actual process of invading human cells. Jeremy Luban, from the University of Massachusetts School of Medicine, has a third hypothesis. The G mutation allows the stingprotein to change shape when attached to the ACE2 receptor, which allows it to better fuse with the cell’s membrane.
Previously, the D614G mutation was the main culprit in the increased viral infection, the researchers published in April. But the findings were also questioned, saying there could be problems with the data collected. The increase d614G mutation in the number of studies could provide officials and doctors with the answers they need to continue fighting the epidemic.