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The genome of camelpox virus
1Plum Island Animal Disease Center, U.S. Department of Agriculture, Greenport, New York, 11944, USA. cafonso@piadc.ars.usda.gov
Virology
|May 30, 2002
Summary
Camelpox virus (CMLV) genome sequencing reveals its close relationship to other orthopoxviruses (OPVs), particularly variola virus (VARV). CMLV possesses unique genes, distinguishing it from VARV and vaccinia virus (VACV).
Area of Science:
- Virology
- Genomics
- Comparative genomics
Background:
- Camelpox virus (CMLV) is an Orthopoxvirus (OPV) causing disease in camels.
- Understanding CMLV's genomic structure is crucial for its classification and relation to other OPVs.
Purpose of the Study:
- To report and analyze the complete genomic sequence of Camelpox virus (CMLV).
- To compare the CMLV genome with other known OPVs, including variola virus (VARV) and vaccinia virus (VACV).
Main Methods:
- Whole-genome sequencing of CMLV.
- Bioinformatic analysis of the CMLV genome, including gene content, order, and amino acid composition.
- Phylogenetic analysis of DNA sequences.
Main Results:
- The CMLV genome is 205,719 bp with 211 putative genes.
- CMLV shares high similarity (96% amino acid identity) with VACV in a significant region.
- CMLV contains a unique 3 kb region with three ORFs absent in other OPVs.
- CMLV is most closely related to VARV among OPVs, sharing essential genes but differing in others.
- Genome structure and phylogenetic analyses confirm CMLV is distinct from VARV and VACV, possibly originating from a cowpox virus (CPXV)-like ancestor.
Conclusions:
- Camelpox virus (CMLV) exhibits a close evolutionary relationship with other orthopoxviruses (OPVs), especially variola virus (VARV).
- Unique genetic elements in CMLV contribute to its distinctiveness.
- The findings support CMLV's classification within the OPV genus and provide insights into its evolutionary origins.