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Home NEWS Science News Health

Coronavirus makes changes that cause cells not to recognize it

Bioengineer by Bioengineer
July 24, 2020
in Health
Reading Time: 3 mins read
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Discovery lays groundwork for designing novel antiviral drugs

IMAGE

Credit: UT Health San Antonio

With an alarm code, we can enter a building without bells going off. It turns out that the SARS coronavirus 2 (SARS-CoV-2) has the same advantage entering cells. It possesses the code to waltz right in.

On July 24 in Nature Communications, researchers at The University of Texas Health Science Center at San Antonio (UT Health San Antonio) reported how the coronavirus achieves this.

The scientists resolved the structure of an enzyme called nsp16, which the virus produces and then uses to modify its messenger RNA cap, said Yogesh Gupta, PhD, the study lead author from the Joe R. and Teresa Lozano Long School of Medicine at UT Health San Antonio.

“It’s a camouflage,” Dr. Gupta said. “Because of the modifications, which fool the cell, the resulting viral messenger RNA is now considered as part of the cell’s own code and not foreign.”

Deciphering the 3D structure of nsp16 paves the way for rational design of antiviral drugs for COVID-19 and other emerging coronavirus infections, Dr. Gupta said. The drugs, new small molecules, would inhibit nsp16 from making the modifications. The immune system would then pounce on the invading virus, recognizing it as foreign.

“Yogesh’s work discovered the 3D structure of a key enzyme of the COVID-19 virus required for its replication and found a pocket in it that can be targeted to inhibit that enzyme. This is a fundamental advance in our understanding of the virus,” said study coauthor Robert Hromas, MD, professor and dean of the Long School of Medicine.

Dr. Gupta is an assistant professor in the Department of Biochemistry and Structural Biology at UT Health San Antonio and is a member of the university’s Greehey Children’s Cancer Research Institute.

In lay terms, messenger RNA can be described as a deliverer of genetic code to worksites that produce proteins.

###

Acknowledgments

The laboratory of the lead author, Yogesh Gupta, PhD, is supported through funds from the Max and Minnie Tomerlin Voelcker Foundation, the San Antonio Area Foundation, The University of Texas System, UT Health San Antonio, the Greehey Children’s Cancer Research Institute of UT Health San Antonio, and the Cancer Prevention and Research Institute of Texas (CPRIT).

Structural basis of RNA cap modification by SARS-CoV-2

Thiruselvam Viswanathan, Shailee Arya, Siu-Hong Chan, Shan Qi, Nan Dai,

Anurag Misra, Jun-Gyu Park, Fatai Oladunni, Dmytro Kovalskyy, Robert A. Hromas,

Luis Martinez-Sobrido and Yogesh K. Gupta

First published: July 24, 2020, Nature Communications

https://doi.org/10.1038/s41467-020-17496-8

The Long School of Medicine at The University of Texas Health Science Center at San Antonio is named for Texas philanthropists Joe R. and Teresa Lozano Long. The school is the largest educator of physicians in South Texas, many of whom remain in San Antonio and the region to practice medicine. The school teaches more than 900 students and trains 800 residents each year. As a beacon of multicultural sensitivity, the school annually exceeds the national medical school average of Hispanic students enrolled. The school’s clinical practice is the largest multidisciplinary medical group in South Texas with 850 physicians in more than 100 specialties. The school has a highly productive research enterprise where world leaders in Alzheimer’s disease, diabetes, cancer, aging, heart disease, kidney disease and many other fields are translating molecular discoveries into new therapies. The Long School of Medicine is home to a National Cancer Institute-designated cancer center known for prolific clinical trials and drug development programs, as well as a world-renowned center for aging and related diseases.

The University of Texas Health Science Center at San Antonio, also referred to as UT Health San Antonio, is one of the country’s leading health sciences universities and is designated as a Hispanic-Serving Institution by the U.S. Department of Education. With missions of teaching, research, patient care and community engagement, its schools of medicine, nursing, dentistry, health professions and graduate biomedical sciences have graduated more than 37,000 alumni who are leading change, advancing their fields, and renewing hope for patients and their families throughout South Texas and the world. To learn about the many ways “We make lives better®,” visit http://www.uthscsa.edu.

Stay connected with UT Health San Antonio on Facebook, Twitter, LinkedIn, Instagram and YouTube.

Media Contact
Will Sansom
[email protected]

Related Journal Article

http://dx.doi.org/10.1038/s41467-020-17496-8

Tags: Infectious/Emerging DiseasesMedicine/Health
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