1887

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Volume 104, Issue 4

Codon pair bias deoptimization of essential genes in infectious laryngotracheitis virus reduces protein expression Open Access

Abstract

Infectious laryngotracheitis virus (ILTV; an alphaherpesvirus) is a respiratory pathogen of chickens and causes significant economic losses in the poultry industry globally, in addition to severe animal health and welfare concerns. To date, studying the role of ILTV genes in viral infection, replication or pathogenesis has largely been limited to genes that can be deleted from the ILTV genome and the resultant deletion mutants characterized or . However, this approach is not suitable for the study of essential genes. This study trialled two different codon deoptimization techniques that aimed to separately disrupt and downregulate the expression of two ILTV genes, ICP8 and UL12, which are essential or very important in viral replication. The target genes were partially recoded using codon usage deoptimization (CUD) and codon pair bias deoptimization (CPBD) approaches and characterized . Viruses deoptimized via CPBD showed decreased protein expression as assessed by Western blotting and/or fluorescence microscopy to measure the intensity of the fluorescent marker fused to the target protein. Viruses deoptimized by CUD showed less consistent results, with some mutants that could not be generated or isolated. The results indicate that CPBD is an attractive and viable tool for the study of essential or critically important genes in ILTV. This is the first study, to our knowledge, that utilizes CPBD and CUD techniques for the study of ILTV genes.

  • Received:
  • Accepted:
  • Published Online:
Keyword(s): codon deoptimization , ICP8 , ILTV , recombination and UL12
Funding
This study was supported by the:
  • Australian Research Council (Award DP180101417)
    • Principle Award Recipient: JoanneM. Devlin
© 2023 The Authors
  • This is an open-access article distributed under the terms of the Creative Commons Attribution License. This article was made open access via a Publish and Read agreement between the Microbiology Society and the corresponding author’s institution.
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2023-04-03
2024-05-14
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Codon pair bias deoptimization of essential genes in infectious laryngotracheitis virus reduces protein expression
J. Gen. Virol. 104, 001836 (2023); https://doi.org/10.1099/jgv.0.001836
/content/journal/jgv/10.1099/jgv.0.001836
/content/journal/jgv/10.1099/jgv.0.001836
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