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Codon Usage Bias: A Potential Factor Affecting VGLUT Developmental Expression and Protein Evolution.

Yiran Zhao1, Yu Zhang1, Jiaxing Feng1

  • 1College of Life Sciences, Yunlong District, Xuzhou Medical University, No. 209, Tongshan Road, Xuzhou City, Jiangsu, 221000, China.

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Codon usage preference influences vesicular glutamate transporter (VGLUT) evolution. Greater preference correlates with lower functional importance, altered expression, and distinct evolutionary paths for VGLUTs.

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Area of Science:

  • Evolutionary biology
  • Molecular biology
  • Genetics

Background:

  • Synonymous substitution and codon usage preference play roles in gene expression, protein structure, and function.
  • Vesicular glutamate transporter (VGLUT) has three isoforms, with VGLUT3 exhibiting significant differences in function, expression, and distribution compared to others.
  • The evolutionary drivers behind these VGLUT isoform differences remain largely unexplained.

Purpose of the Study:

  • To investigate the role of codon usage preference in the evolutionary differentiation of the three VGLUT isoforms.
  • To analyze how codon usage patterns influence VGLUT functional importance, expression levels, and distribution.

Main Methods:

  • Bioinformatic analysis of VGLUT coding sequences across various species.
  • Comparative analysis of codon usage patterns among VGLUT isoforms.
  • Integration of functional importance, expression data, gene structure, protein interaction networks, developmental expression, and phylogenetic analysis.

Main Results:

  • Higher codon usage preference in VGLUTs was associated with reduced functional importance and lower expression levels.
  • VGLUTs with greater codon preference showed more peripheral distribution (outside the central nervous system).
  • Increased codon preference correlated with simpler gene structures, less conserved miRNA regulatory sites, less complex protein interaction networks, delayed developmental expression, and more distant evolutionary relationships.

Conclusions:

  • Codon usage preference is a significant factor influencing the evolutionary trajectory of VGLUTs.
  • Codon bias potentially shapes VGLUT developmental expression and protein evolution, contributing to isoform divergence.