Evolution of codon usage bias in henipaviruses is governed by natural selection and is host-specific

Naveen Kumar, Diwakar D. Kulkarni, Benhur Lee, Rahul Kaushik, Sandeep Bhatia, Richa Sood, Atul Kumar Pateriya, Sushant Bhat, Vijendra Pal Singh

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Hendra virus (HeV) and Nipah virus (NiV) are among a group of emerging bat-borne paramyxoviruses that have crossed their species-barrier several times by infecting several hosts with a high fatality rate in human beings. Despite the fatal nature of their infection, a comprehensive study to explore their evolution and adaptation in different hosts is lacking. A study of codon usage patterns in henipaviruses may provide some fruitful insight into their evolutionary processes of synonymous codon usage and host-adapted evolution. Here, we performed a systematic evolutionary and codon usage bias analysis of henipaviruses. We found a low codon usage bias in the coding sequences of henipaviruses and that natural selection, mutation pressure, and nucleotide compositions shapes the codon usage patterns of henipaviruses, with natural selection being more important than the others. Also, henipaviruses showed the highest level of adaptation to bats of the genus Pteropus in the codon adaptation index (CAI), relative to the codon de-optimization index (RCDI), and similarity index (SiD) analyses. Furthermore, a comparison to recently identified henipa-like viruses indicated a high tRNA adaptation index of henipaviruses for human beings, mainly due to F, G and L proteins. Consequently, the study concedes the substantial emergence of henipaviruses in human beings, particularly when paired with frequent exposure to direct/indirect bat excretions.

Original languageEnglish
Article number604
JournalViruses
Volume10
Issue number11
DOIs
StatePublished - 1 Nov 2018

Keywords

  • Codon usage bias
  • Evolution
  • Henipaviruses
  • Host adaptation
  • Natural selection

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