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Sequence and phylogenetic analysis of P10- and P17-encoding genes of avian reovirus

Hsiao W Hsu1, Hung Y Su, Pi H Huang

  • 1Graduate Institute of Biotechnology, Taiwan.

Avian Diseases
|April 21, 2005
PubMed

Insights

Avian reovirus (ARV) P10 and P17 genes show significant sequence divergence and have evolved into five distinct lineages. Their evolution is independent of ARV serotypes or disease states.

Area of Science:

  • * Virology
  • * Molecular Evolution
  • * Bioinformatics

Background:

  • * Avian reovirus (ARV) is an important poultry pathogen causing significant economic losses.
  • * The ARV P10 protein is a known viroporin involved in cell fusion.
  • * The biological function of the ARV P17 protein remains largely unknown.

Purpose of the Study:

  • * To analyze the nucleotide sequences of ARV P10 and P17 genes from diverse field isolates and vaccine strains.
  • * To define phylogenetic profiles and investigate sequence variability and genetic evolution of P10 and P17 genes.
  • * To understand the evolutionary patterns of P10 and P17 genes in relation to ARV serotypes and disease states.

Main Methods:

  • * Nucleotide sequence analysis of P10- and P17-encoding genes from 17 ARV isolates collected over 23 years.
  • * Phylogenetic profiling to determine evolutionary relationships and genetic divergence.
  • * Comparative sequence analysis with other orthoreoviruses and ARV S-class genes.

Main Results:

  • * P10 and P17 genes exhibit high sequence divergence, evolving into five distinct lineages.
  • * The P17-encoding gene shows greater sequence divergence than the P10-encoding gene.
  • * Synonymous substitutions are predominant in both genes, indicating purifying selection.
  • * P10 and P17 genes evolve independently of each other and ARV S-class genes.
  • * Significant sequence divergence exists between ARV and other orthoreoviruses.
  • * Gene diversity is not dependent on viral serotypes or correlated with disease states.

Conclusions:

  • * ARV P10 and P17 genes possess distinct evolutionary trajectories.
  • * The independent evolution of P10 and P17 suggests unique functional pressures.
  • * Phylogenetic analysis provides insights into ARV genetic diversity and evolution.
  • * Understanding P10 and P17 evolution can aid in ARV control and vaccine development.

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