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Replication slippage in the evolution of potyviruses
J M Hancock1, W Chaleeprom, W Chaleeprom
1Research School of Biological Sciences, Australian National University, Canberra, Australia.
The Journal of General Virology
|December 1, 1995
Summary
Replication slippage, a process causing sequence repetition, was found in potyviruses. This suggests slippage contributes to the evolution of viruses and other organisms, impacting both RNA and DNA replication.
Area of Science:
- Virology
- Molecular Biology
- Genetics
Background:
- Recent evidence suggests sequence repetition occurs in potyvirus genomes.
- Understanding the mechanisms behind genome evolution is crucial in virology.
Purpose of the Study:
- To investigate the prevalence and significance of replication slippage in potyviruses.
- To determine if replication slippage is a factor in the evolution of potyvirus genomes.
Main Methods:
- Analysis of published complete genome sequences of potyviruses.
- Examination of coat protein gene sequences for evidence of sequence repetition and slippage.
- Comparative analysis across different potyvirus strains and related viruses.
Main Results:
- Significant sequence repetitions indicative of replication slippage were identified in 5 out of 9 complete potyvirus genomes.
- Replication slippage was observed in 17 out of 32 coat protein genes analyzed.
- Evidence of slippage was also found in the 5' region of the turnip mosaic virus genome.
Conclusions:
- Replication slippage appears to be a common mechanism in potyvirus genome evolution.
- The findings suggest that replication slippage plays a role in the evolution of diverse organisms, including prokaryotes and eukaryotes.
- Replication slippage can occur during the replication of both RNA and DNA molecules.