{
  "id": 18301019,
  "title": "Diversification of budding yeast polarization dynamics after compensatory experimental evolution",
  "url": "https://urgent.news/2026/11/05/diversification-of-budding-yeast-polarization-dynamics-after",
  "topic": "science",
  "section": "Science",
  "published": "2026-11-05T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.11.04.764177v1?rss=1"
  },
  "original_language": "en",
  "account": "Budding yeast, a model organism for studying cellular processes, can evolve under significant selection pressure. Despite this, the underlying protein networks responsible for essential functions can differ greatly. The extent to which evolution influences the dynamics of proteins involved in crucial tasks remains largely unexplored. In this study, researchers examined the evolution of budding yeast polarization phenotypes along a previously established evolutionary recovery pathway, where the near-essential polarity gene BEM1 had been lost. Utilizing quantitative live cell imaging, the team observed that the absence of BEM1 weakened and destabilized polarization. Strikingly, in the lineages that had evolved to recover this gene, there were substantial changes in protein dynamics compared to the original ancestor. One of the most notable shifts was a significant decrease in the presence of the main regulator Cdc42-GTP, while the polarisome member Spa2 localized more slowly into mobile foci. Although the specific phenotypic traits were only weakly conserved, the researchers found evidence of protein-independent localization modes, indicating a convergence of molecular phenotypes along the evolutionary trajectory. These findings demonstrate that evolution can restore a cell's overall functionality without maintaining the same microscopic organization, ultimately leading to the emergence of new molecular phenotypes.",
  "summary": "Essential cellular processes evolve under strong selection, yet protein networks underlying conserved functions can vary substantially. To what extent evolution constrains the intracellular dynamics of proteins performing essential functions is currently largely unknown. Here, we characterize budding yeast polarization phenotypes along a previously established evolutionary recovery trajectory,…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}