ISSN: 0973-7510

E-ISSN: 2581-690X

Review Article | Open Access
Sayani Jati1, Kanthesh M. Basalingappa1 , B. Geethanjali1, R. Parthiban3,S. Prathibha Rajashekara4 and T.S. Gopenath2
1Division of Molecular Biology, Faculty of Life Sciences, JSS AHER, SS Nagar, Mysuru – 570 015, Karnataka, India.
2Department of Biotechnology and Bioinformatics, Faculty of Life Sciences, JSS AHER, SS Nagar, Mysuru – 570 015, Karnataka, India.
3Department of Clinical Laboratory Services and Translational Research, Malabar Cancer Centre, Thalassery, Kannur – 670 103, Kerala, India.
4Department of Botany, JSS College, Ooty Road, Mysuru – 570025, Karnataka, India.
J Pure Appl Microbiol. 2021;15(4):1798-1808 | Article Number: 7286 | © The Author(s). 2021
Received: 03/09/2021 | Accepted: 02/11/2021 | Published: 22/11/2021

Coronaviruses are a group of enveloped viruses with a longer, undivided single-stranded RNA genome, which cause diseases in a variety of animals and humans. In addition to infecting other economically important animals (such as pigs or chickens), six coronaviruses are known to infect human hosts, causing respiratory illness. Severe acute respiratory syndrome coronavirus (SARS-CoV) and Middle East respiratory syndrome coronavirus (MERS-CoV) are highly pathogenic animal coronaviruses that have produced local, regional, and worldwide outbreaks. It is suspected that the current pandemic, caused by a similar coronavirus (SARS-CoVID-19). A new variant of B.1.617 lineage that causes worry about many countries has been identified first in the UK but it makes the worst scenario in India. This includes mutants with immune prolapse E484K and N501Y mutations. Some new variants recently discovered in India like double & triple mutation due to some specific climatic and environmental conditions. Because it creates a viral exodermis and contacts human cells due to mutations in peplomer proteins. The other type of protein is spike protein, are required to bind to receptors in human cells mutations. It can improve the affinity for human receptors and increase the virus, they can cause immune prolapse and reinfection. Moreover, these viruses are capable of adapting and mutating to the new environment. Our immune system is unable to distinguish them from previous infections due to changes in the structure of proteins. The rapid transmission of the COVID-19 around the world causing a severe mortality rate depends on mutation on their spike protein.


COVID-19, SARS-CoV, Variants, Genome, Epidemiology, Mutation

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© The Author(s) 2021. Open Access. This article is distributed under the terms of the Creative Commons Attribution 4.0 International License which permits unrestricted use, sharing, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.