{
  "id": 5345365,
  "title": "Structural basis for tetraspanin-dependent surface export and adhesive function of integrin α3β1",
  "url": "https://urgent.news/2026/09/03/structural-basis-for-tetraspanin-dependent-surface-export-and",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-03T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.01.748654v1?rss=1"
  },
  "original_language": "en",
  "account": "Integrin alpha3beta1 (ITG3beta1) is a vital protein that enables epithelial cells to securely attach to the basement membrane, which is composed of laminin proteins. This interaction is facilitated by a complex formed between ITG3beta1 and the tetraspanin CD151. When either ITG3beta1 or CD151 is mutated, it results in epidermolysis bullosa, a skin blistering condition caused by a defect in basement membrane attachment. In this study, researchers utilized cryo-electron microscopy to capture the structure of the ITG3beta1-CD151 complex. Their findings indicate that a mutation in CD151 at the binding site disrupts complex formation within cells. Notably, the researchers discovered that knocking out CD151 through CRISPR technology leads to a surface export defect in ITG3beta1, but this defect can be corrected by reintroducing the wild-type CD151, but not when it is mutated. The studies collectively elucidate the molecular mechanism behind CD151's binding to ITG3beta1, and demonstrate that CD151 plays a crucial role in facilitating ITG3beta1 surface export. This explanation offers a biochemical rationale for the loss-of-function phenotype observed in individuals with CD151 mutations, as seen in epidermolysis bullosa.",
  "summary": "Integrin 3{beta}1 (ITG3{beta}1) is a member of an integrin subfamily that binds to laminin proteins and promotes attachment of epithelial cells to the basement membrane. ITG3{beta}1 forms a complex with the tetraspanin CD151, and loss-of-function mutations in both ITG3 and CD151 cause epidermolysis bullosa, a severe skin blistering disease resulting from a defect in basement membrane attachment.…",
  "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."
}