{
  "id": 8733342,
  "title": "SMCHD1's DNA binding activity enables its stable retention on chromatin",
  "url": "https://urgent.news/2026/09/20/smchd1s-dna-binding-activity-enables-its-stable-retention-on-chromatin",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-20T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.14.751594v1?rss=1"
  },
  "original_language": "en",
  "account": "Chromatin proteins play a crucial role in regulating genes, but their mechanism of action, especially with weak DNA binding affinity, remains unclear. This study focuses on SMCHD1, a non-canonical SMC-family protein that participates in three-dimensional genome organization and the repression of genes on the inactive X chromosome and its autosomal targets. Researchers replaced the native SMCHD1 with a GFP-tagged wild-type or a hinge-domain DNA-binding mutated version to determine the role of DNA binding. The mutated form exhibited lower accumulation at the inactive X chromosome in female cells, yet maintained stable binding at most autosomal sites. The DNA binding capability of SMCHD1 weakens its ability to repress genes and regulate chromatin states, resulting in a hypomorphic effect. Through various live-cell imaging techniques, the study found that DNA binding restricts SMCHD1's mobility and aids in maintaining its chromatin-bound state, both during interphase and mitosis. The conclusion is that the weak and sequence-independent DNA binding of SMCHD1 is a critical factor in determining its chromatin residence, localization, and function. This research provides a foundation for understanding other chromatin proteins with similar DNA binding characteristics.",
  "summary": "Chromatin proteins play critical roles in gene regulation, yet frequently we do not fully understand how weak DNA binding affinity of such proteins contributes to their locus-specific actions. Here, we studied SMCHD1, a non-canonical SMC-family protein involved in three-dimensional genome organization and gene repression of the inactive X chromosome and its autosomal targets. We replaced…",
  "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."
}