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The complete sequence of a human astrovirus
M M Willcocks1, T D Brown, C R Madeley
1Division of Virology, School of Pathological Sciences, University of Newcastle upon Tyne, U.K.
The Journal of General Virology
|July 1, 1994
Summary
Researchers sequenced the complete human astrovirus serotype 1 genome, revealing three open reading frames (ORFs) encoding non-structural and structural viral proteins. This genomic structure is similar to plant viruses.
Area of Science:
- Virology
- Genomics
- Molecular Biology
Background:
- Human astroviruses are a significant cause of gastroenteritis in children and the elderly.
- Understanding the complete genome sequence is crucial for developing antiviral strategies.
Purpose of the Study:
- To determine the complete genomic sequence of human astrovirus serotype 1.
- To analyze the genomic organization and identify key functional elements.
Main Methods:
- Whole-genome sequencing of human astrovirus serotype 1.
- Bioinformatic analysis of the obtained genomic sequence.
- Identification of open reading frames (ORFs) and conserved motifs.
Main Results:
- The complete genome sequence of human astrovirus serotype 1 is 6813 nucleotides long.
- Three sequential ORFs were identified, encoding non-structural proteins (serine protease, RNA-dependent RNA polymerase) and structural proteins.
- A ribosomal frameshifting motif links the first two ORFs, and a nuclear addressing sequence was found.
- The genomic organization is similar to that of the plant virus family Luteoviridae.
Conclusions:
- The determined genomic sequence provides a comprehensive understanding of human astrovirus serotype 1.
- The identified ORFs and motifs offer insights into viral replication and assembly mechanisms.
- The resemblance to Luteoviridae suggests potential conserved evolutionary pathways between animal and plant viruses.