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Three-dimensional structure of aspartyl protease from human immunodeficiency virus HIV-1
M A Navia1, P M Fitzgerald, B M McKeever
1Department of Biophysical Chemistry, Merck Sharp and Dohme Research Laboratories, Rahway, New Jersey 07065.
Abstract:
The crystal structure of the protease of the human immunodeficiency virus type (HIV-1), which releases structural proteins and enzymes from viral polyprotein products, has been determined to 3 A resolution. Large regions of the protease dimer, including the active site, have structural homology to the family of microbial aspartyl proteases. The structure suggests a mechanism for the autoproteolytic release of protease and a role in the control of virus maturation.
Insights
The crystal structure of human immunodeficiency virus type 1 (HIV-1) protease was determined. This enzyme is crucial for viral maturation and shares structural similarities with microbial aspartyl proteases.
Area of Science:
- Structural biology
- Virology
- Biochemistry
Background:
- Human immunodeficiency virus type 1 (HIV-1) protease is essential for viral replication.
- Protease activity releases functional viral proteins from polyprotein precursors.
- Understanding HIV-1 protease structure is key to developing antiviral therapies.
Purpose of the Study:
- To determine the high-resolution crystal structure of the HIV-1 protease dimer.
- To elucidate the structural basis for protease function and its relationship to other aspartyl proteases.
- To investigate the mechanism of protease autoproteolytic release and its role in virus maturation.
Main Methods:
- X-ray crystallography was used to determine the crystal structure.
- The structure was resolved to 3 Angstrom resolution.
- Comparative structural analysis was performed with microbial aspartyl proteases.
Main Results:
- The crystal structure of the HIV-1 protease dimer was successfully determined.
- Significant structural homology was observed between the HIV-1 protease active site and microbial aspartyl proteases.
- The determined structure provides insights into the autoproteolytic release mechanism of the protease.
Conclusions:
- The structural data reveals conserved features with microbial aspartyl proteases, suggesting a common evolutionary origin.
- The structure offers a mechanistic understanding of how HIV-1 protease is released and regulates virus maturation.
- This structural information can guide the design of novel HIV-1 protease inhibitors.