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Cymbidium mosaic potexvirus RNA: complete nucleotide sequence and phylogenetic analysis
S M Wong1, P H Mahtani, K C Lee
1School of Biological Sciences, The National University of Singapore, Kent Ridge.
Archives of Virology
|January 1, 1997
Summary
The complete nucleotide sequence of cymbidium mosaic potexvirus (CymMV) was determined, revealing a genome organization similar to other potexviruses. This study provides the first full sequence of CymMV, aiding in understanding its relationships within the potexvirus group.
Area of Science:
- Plant Virology
- Molecular Biology
- Genomics
Background:
- Cymbidium mosaic potexvirus (CymMV) is a significant plant pathogen.
- Understanding the genomic structure of viruses is crucial for disease management and control.
Purpose of the Study:
- To determine and analyze the complete nucleotide sequence of the CymMV genomic RNA.
- To compare the genomic organization and protein homology of CymMV with other potexviruses.
Main Methods:
- Next-generation sequencing to obtain the complete genomic RNA sequence.
- Bioinformatic analysis to identify open reading frames (ORFs) and conserved regions.
- Phylogenetic analysis based on RNA-dependent RNA polymerase (RdRp) and coat protein sequences.
Main Results:
- The complete nucleotide sequence of CymMV genomic RNA is 6227 nucleotides (excluding the poly (A) tail).
- Genome organization includes five ORFs encoding RdRp, triple-gene-block (TGB) proteins, and coat protein, showing high homology to other potexviruses.
- CymMV has the shortest 5' noncoding region (NCR) among potexviruses, initiating with GAAAA; phylogenetic analysis places it closely related to PAMV, NMV, WClMV, and SMYEaV.
Conclusions:
- This is the first report of the complete nucleotide sequence of CymMV.
- The genomic data provides insights into the evolutionary relationships and molecular characteristics of CymMV within the Potexviridae family.
- Findings contribute to a better understanding of potexvirus diversity and evolution.