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The Anaplasma ovis genome reveals a high proportion of pseudogenes

Zhijie Liu1, Austin M Peasley2, Jifei Yang1

  • 1State Key Laboratory of Veterinary Etiological Biology, Key Laboratory of Veterinary Parasitology of Gansu Province, Lanzhou Veterinary Research Institute, Chinese Academy of Agricultural Sciences, Lanzhou, People's Republic of China.

BMC Genomics
|January 23, 2019
PubMed
Abstract

Insights

The first complete genome sequence of Anaplasma ovis, an understudied sheep pathogen, reveals its genetic makeup and potential vaccine targets. This research provides a foundation for future studies on this economically significant tick-borne bacterium.

Area of Science:

  • Microbiology
  • Genomics
  • Veterinary Science

Background:

  • The genus Anaplasma comprises organisms with small, reductively evolving genomes.
  • Anaplasma ovis is an understudied tick-borne pathogen affecting sheep and ruminants, potentially causing economic losses due to its wide distribution.

Purpose of the Study:

  • To present the first complete genome sequence of Anaplasma ovis.
  • To compare A. ovis genome features with related Anaplasma species.
  • To identify potential vaccine candidates within the A. ovis genome.

Main Methods:

  • Whole-genome sequencing of Anaplasma ovis.
  • Comparative genomic analysis with other Anaplasma species.
  • Identification and analysis of gene families and pseudogenes.

Main Results:

  • The complete genome sequence of A. ovis (1,214,674 bp) encodes 933 protein-coding sequences.
  • The genome exhibits a split rRNA operon arrangement and a higher number of pseudogenes than previously observed in Anaplasma.
  • A. ovis possesses a limited set of surface proteins and transporters, with several novel genes identified.

Conclusions:

  • The genome analysis provides insights into the biology of A. ovis.
  • Comparative genomics highlights unique and conserved features relevant to Anaplasma evolution.
  • The identified genes offer potential targets for vaccine development against A. ovis infections.
Keywords:
Comparative genomicsDiagnostic assayGenome sequenceRickettsial pathogenVaccine development

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