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Viral proteases: an emerging therapeutic target.
1Central Research Department, DuPont Experimental Station, Wilmington, Delaware.
Critical Reviews in Biotechnology
|January 1, 1988
Summary
Researchers identified a cysteine-histidine active site in viral proteases, enabling the design of targeted antiviral drugs. This breakthrough offers new therapeutic strategies for viral diseases like polio and the common cold.
Area of Science:
- Virology
- Biochemistry
- Molecular Biology
Background:
- Limited knowledge of viral target molecules restricts treatment options for many viral diseases.
- Viral proteases, particularly from picornaviruses, are promising targets for antiviral drug development.
Purpose of the Study:
- To characterize viral proteases and their active sites.
- To design selective inhibitors for viral proteases with potential antiviral properties.
Main Methods:
- Molecular-genetic and biochemical approaches were used to characterize picornavirus proteases.
- Heterologous expression systems were employed to produce viral enzymes.
- Mutagenesis studies were conducted on viral proteases.
Main Results:
- Viral proteases were successfully expressed and demonstrated proteolytic activity and high cleavage fidelity.
- Mutagenesis confirmed a cysteine active-site class, with a unique clustering of active-site residues.
- A cysteine-histidine active-site pair and knowledge of viral cleavage sites facilitated the design of selective inhibitors.
Conclusions:
- Selective inhibitors with potential antiviral properties were designed based on the identified viral protease characteristics.
- Further research will focus on the structural basis of selective processing and its application in genetic engineering.