{
  "id": 7337213,
  "title": "Site-resolved spatial and structural interactome of a human cell",
  "url": "https://urgent.news/2026/09/14/site-resolved-spatial-and-structural-interactome-of-a-human-cell",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-14T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.08.749775v1?rss=1"
  },
  "original_language": "en",
  "account": "The spatial and structural organization of proteins plays a crucial role in virtually every process within human cells. To systematically map this cellular proteome architecture, researchers employed a combination of gentle subcellular fractionation through differential ultracentrifugation and cross-linking mass spectrometry. This approach yielded 164,146 residue-to-residue links in HEK293 cells, with a resolution fine enough to pinpoint protein localizations at the sub-organelle level, determine protein orientations within cellular membranes, and identify inter-organelle contact sites.\n\nThese detailed insights translated into the discovery of 18,074 direct protein-protein interactions (PPIs), which were then integrated into AlphaFold-based pipelines to identify PPI-mediating short linear motifs and generate assembly models of large protein complexes. By leveraging these spatial and structural readouts, researchers were able to uncover new PPIs within the endomembrane system, shedding light on how they regulate the compartmental localization of trafficking machinery.\n\nTo further enhance their findings, the research team expanded their HEK293 dataset by incorporating PPI data from various cell lines and methodologies. This network topology-driven strategy allowed them to augment the spatial and structural interactome of human cells, providing a more comprehensive understanding of protein interactions in different cellular contexts.",
  "summary": "The spatial and structural arrangement of proteins determine virtually every process in human cells. We combined gentle subcellular fractionation by differential ultracentrifugation with cross-linking mass spectrometry to systematically map this cellular proteome architecture with residue-level evidence, identifying 164,146 residue-to-residue links in HEK293 cells. These links capture spatial…",
  "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."
}