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Processing of rabbit hemorrhagic disease virus polyprotein
J M Martín Alonso1, R Casais, J A Boga
1Departamento de Bioquímica y Biología Molecular, Universidad de Oviedo, Spain.
Journal of Virology
|February 1, 1996
Summary
Researchers studied rabbit hemorrhagic disease virus (RHDV) polyprotein processing. They identified four RHDV gene products and found the RHDV 3C proteinase cleaves specific Glu-Gly bonds.
Area of Science:
- Virology
- Molecular Biology
- Biochemistry
Background:
- Rabbit hemorrhagic disease virus (RHDV) is a significant pathogen affecting lagomorphs.
- Understanding viral polyprotein processing is crucial for comprehending viral replication and pathogenesis.
Purpose of the Study:
- To investigate the proteolytic processing of the RHDV polyprotein encoded by ORF1.
- To identify the specific cleavage sites and products generated by the RHDV 3C proteinase.
Main Methods:
- In vitro expression of RHDV cDNAs using rabbit reticulocyte lysates and Escherichia coli.
- Utilized an epitope tag for monitoring gene products with a specific antibody.
- Determined N-terminal amino acid sequences of identified RHDV gene products.
Main Results:
- Identified four RHDV gene products with molecular masses of 80, 43, 73, and 60 kDa.
- Amino-terminal sequencing revealed the RHDV 3C proteinase cleaves at Glu-Gly peptide bonds.
- Characterized the proteolytic processing pathway of the RHDV polyprotein.
Conclusions:
- The RHDV 3C proteinase plays a key role in processing the viral polyprotein.
- Elucidating these cleavage events provides insights into RHDV replication mechanisms.
- Findings contribute to a deeper understanding of RHDV molecular biology and potential antiviral targets.