{
  "id": 4580855,
  "title": "Substrate Profiling of RNF216 Uncovers a Translation-Linked OTUD4 Regulatory Axis",
  "url": "https://urgent.news/2026/08/30/substrate-profiling-of-rnf216-uncovers-a-translation-linked-otud4",
  "topic": "science",
  "section": "Science",
  "published": "2026-08-30T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.08.26.747332v1?rss=1"
  },
  "original_language": "en",
  "account": "Mutations in the E3 Ubiquitin ligase RNF216 lead to Gordon Holmes syndrome (GHS), a neurodegenerative disorder characterized by neuroendocrine disruption. To study the RNF216 substrates, researchers developed an orthogonal ubiquitin transfer platform to capture these proteins in neuronal cells. This approach identified OTUD4, a deubiquitinating enzyme (DUB) mutated in GHS, as well as FMRP, a neuronal-enriched translational repressor.\n\nRNF216 primarily synthesizes K6-linked Ub chains on OTUD4, resulting in its degradation and the formation of donut-shaped structures in neurons. Conversely, OTUD4 removes the ubiquitination of both RNF216 and FMRP. By analyzing RNF216 substrates, researchers discovered that their interaction network regulates protein synthesis, a shared function for both proteins. Indeed, increased RNF216 expression leads to higher protein synthesis rates across various cell types, while Rnf216 deletion results in diminished dendritic development in neurons.\n\nIn summary, the study reveals that RNF216 and OTUD4 modulate protein synthesis and degradation rates, suggesting that GHS-related mutations in either RNF216 or OTUD4 may disrupt this balance, ultimately contributing to neurodegeneration.",
  "summary": "Mutations in the E3 Ubiquitin (Ub) ligase RNF216 cause Gordon Holmes syndrome (GHS), a neurodegenerative disorder accompanied by neuroendocrine disruption. We developed an orthogonal ubiquitin transfer (OUT) platform to capture RNF216 substrates in neuronal cells and identified OTUD4, a deubiquitinating enzyme (DUB) mutated in GHS, and FMRP, a neuronal-enriched translational repressor. RNF216…",
  "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."
}