Transitions in the proteome and phospho-proteome during Xenopus laevis development

Area of Science:

• Developmental Biology
• Proteomics
• Phosphoproteomics

Background:

• Vertebrate development involves complex proteome and post-translational modification changes.
• Understanding protein-level dynamics is crucial but less explored than RNA-level changes.

Purpose of the Study:

• To deeply analyze proteome and phosphoproteome changes across Xenopus laevis embryonic development.
• To identify key transitions and coordinated changes in protein and phosphorylation profiles.

Main Methods:

• Quantitative proteomic and phosphoproteomic analysis of Xenopus laevis embryos at 11 developmental stages.
• Development of a pipeline for identifying homologous human phosphorylations.

Main Results:

• Major proteome alterations occur during the transition to the tadpole stage, with increased non-yolk proteins and a shift towards interaction-related proteins.
• Significant phosphorylation changes are concentrated in early development, except for gene expression-related phosphorylations.
• Differential changes observed in membrane/secreted versus nuclear proteins between early and late tadpole stages.

Conclusions:

• Coordinated transitions in protein and phosphorylation profiles reflect distinct developmental strategies.
• The study provides a comprehensive resource for exploring developmental biology at proteomic and phosphoproteomic levels.
• Homology mapping facilitates cross-species interpretation of phosphorylation data.