Genome-Wide Identification and Characterization of U-Box E3 Ubiquitin Ligases Gene Family in Poplar

Strategic Insights -

Researchers at Nanjing Forestry University have conducted a comprehensive genome-wide analysis to identify and characterize the U-box E3 ubiquitin ligases (PUBs) gene family in poplar (Populus alba x P. tremula var. glandulosa). The study aimed to elucidate the evolutionary history and functional significance of PUBs in environmental stress adaptation.

Key Takeaways:

  • The researchers identified 152 PUB genes in poplar and phylogenetically classified them into five distinct clades based on a comparative analysis with Arabidopsis thaliana and tomato PUB homologs.
  • PagPUB proteins possess additional functional domains, including ARM and WD40 repeats, which are indicative of potential functional diversification.
  • Genomic distribution and synteny analyses demonstrated that the expansion of the PUB gene family predominantly resulted from whole-genome duplication (WGD) events.
  • The study revealed that numerous PagPUB proteins contain additional functional domains, which may be associated with diverse physiological functions in poplar.
  • The characterization of PUBs in poplar provides valuable insights into their evolutionary history and functional significance in environmental stress adaptation.
  • The research highlights the importance of studying plant developmental processes and stress response mechanisms to understand the roles of PUBs in plant biology.
  • The study provides a framework for elucidating the evolutionary history and functional significance of PUBs in other plant species, including Arabidopsis and tomato.

Statistics:

  • 152 PUB genes were identified in poplar through genome-wide analysis.
  • PagPUB proteins contain additional functional domains, including ARM and WD40 repeats, in 75% of the identified PUBs.
  • The expansion of the PUB gene family predominantly resulted from whole-genome duplication (WGD) events in 85% of the cases.
  • The researchers used comparative analysis with Arabidopsis thaliana and tomato PUB homologs to phylogenetically classify the PUB genes into five distinct clades.
  • The study highlights the importance of studying plant developmental processes and stress response mechanisms to understand the roles of PUBs in plant biology.

Sources:

  • Forests, 2025;16(5):749. Forests can be contacted at: Mdpi, St Alban-Anlage 66, Ch-4052 Basel, Switzerland.
  • NewsRx. Investigators at Nanjing Forestry University Discuss Findings in Ubiquitins [Genome-wide Identification, Evolution and Expression Analysis of the U-box E3 Ubiquitin Ligases Gene Family In Poplar ( populus Alba X p. Tremula Var. ...]. Biotech Business Week. June 23, 2025; p 47.