Comparison of nucleic and amino acid sequences and phylogenetic analysis of the Gs protein of various equine arteritis virus isolates.

The research article focuses on understanding the genetic variation in the Gs protein gene of the Equine Arteritis Virus (EAV) by comparing it with the reference Bucyrus strain. The study also explores the genetic distinction in different EAV isolates utilizing nucleic and deduced amino acid sequences along with phylogenetic analysis.

Outline of the Research

• This scientific exploration digs into the genetic variance in the Gs protein of the equine arteritis virus (EAV), a pathogen majorly affecting horses.
• The investigation involves an in-depth comparative study of nucleic and predicted amino acid sequences from eight different EAV isolates.
• The isolates include: one from Europe, two from the United States, and five from Canada. The comparative study is carried out using the established Bucyrus strain as a reference.

Findings

• The researchers discovered that the nucleotide and amino acid similarities between the eight isolates and the Bucyrus reference strain fell between 92.3% and 96.4% for nucleotide identities, and 93.2% and 95.5% for amino acid identities.
• In spite of these similarities, the application of phylogenetic tree analysis and estimation of genetic distances based on the sequences of the Gs protein encoding gene showed distinct genetic divergences in these strains. Specifically, the European strain Vienna, the American strain 87AR-A1, and all the other North American EAV isolates could be separated into three significantly divergent groups.

Significance of the Results

• The outcomes of this study clearly indicate that the gene encoding the Gs protein in EAV is subject to genetic variance.
• This correlates with previous studies demonstrating genetic variation in other structural protein-encoding EAV genes – M, N, and GL.
• Consequently, this research adds value in understanding the genetic variations and the evolutionary trajectory of EAV, which could have implications in disease management and control strategies for horse populations.