[English] 日本語
Yorodumi Papers
- Database of articles cited by EMDB/PDB/SASBDB data -

+
Search query

Keywords
Structure methods
Author
Journal
IF

-
Structure paper

TitleQuantitative spatial analysis of chromatin biomolecular condensates using cryoelectron tomography.
Journal, issue, pagesProc Natl Acad Sci U S A, Vol. 122, Issue 19, Page e2426449122, Year 2025
Publish dateMay 13, 2025
AuthorsHuabin Zhou / Joshua Hutchings / Momoko Shiozaki / Xiaowei Zhao / Lynda K Doolittle / Shixin Yang / Rui Yan / Nikki Jean / Margot Riggi / Zhiheng Yu / Elizabeth Villa / Michael K Rosen /
PubMed AbstractPhase separation is an important mechanism to generate certain biomolecular condensates and organize the cell interior. Condensate formation and function remain incompletely understood due to ...Phase separation is an important mechanism to generate certain biomolecular condensates and organize the cell interior. Condensate formation and function remain incompletely understood due to difficulties in visualizing the condensate interior at high resolution. Here, we analyzed the structure of biochemically reconstituted chromatin condensates through cryoelectron tomography. We found that traditional blotting methods of sample preparation were inadequate, and high-pressure freezing plus focused ion beam milling was essential to maintain condensate integrity. To identify densely packed molecules within the condensate, we integrated deep learning-based segmentation with context-aware template matching. Our approaches were developed on chromatin condensates and were also effective on condensed regions of in situ native chromatin. Using these methods, we determined the average structure of nucleosomes to 6.1 and 12 Å resolution in reconstituted and native systems, respectively, found that nucleosomes form heterogeneous interaction networks in both cases, and gained insight into the molecular origins of surface tension in chromatin condensates. Our methods should be applicable to biomolecular condensates containing large and distinctive components in both biochemical reconstitutions and certain cellular systems.
External linksProc Natl Acad Sci U S A / PubMed:40327693 / PubMed Central
MethodsEM (subtomogram averaging)
Resolution6.1 - 22.0 Å
Structure data

EMDB-49923: Subtomogram average of nucleosome structure extracted from the HeLa cell nuclei
Method: EM (subtomogram averaging) / Resolution: 12.0 Å

EMDB-49924: Subtomogram averaging of nucleosomes in reconstituted chromatin condensates
Method: EM (subtomogram averaging) / Resolution: 6.1 Å

EMDB-49929: Subtomogram average of nucleosome from NIH3T3 cells, class 2
Method: EM (subtomogram averaging) / Resolution: 22.0 Å

EMDB-53275: Subtomogram average of nucleosome from NIH3T3 cells, class 1
Method: EM (subtomogram averaging) / Resolution: 12.6 Å

Source
  • Homo sapiens (human)
  • Escherichia coli (E. coli)
  • Mus musculus (house mouse)

+
About Yorodumi Papers

-
News

-
Feb 9, 2022. New format data for meta-information of EMDB entries

New format data for meta-information of EMDB entries

  • Version 3 of the EMDB header file is now the official format.
  • The previous official version 1.9 will be removed from the archive.

Related info.:EMDB header

External links:wwPDB to switch to version 3 of the EMDB data model

-
Aug 12, 2020. Covid-19 info

Covid-19 info

URL: https://pdbj.org/emnavi/covid19.php

New page: Covid-19 featured information page in EM Navigator.

Related info.:Covid-19 info / Mar 5, 2020. Novel coronavirus structure data

+
Mar 5, 2020. Novel coronavirus structure data

Novel coronavirus structure data

Related info.:Yorodumi Speices / Aug 12, 2020. Covid-19 info

External links:COVID-19 featured content - PDBj / Molecule of the Month (242)：Coronavirus Proteases

+
Jan 31, 2019. EMDB accession codes are about to change! (news from PDBe EMDB page)

EMDB accession codes are about to change! (news from PDBe EMDB page)

  • The allocation of 4 digits for EMDB accession codes will soon come to an end. Whilst these codes will remain in use, new EMDB accession codes will include an additional digit and will expand incrementally as the available range of codes is exhausted. The current 4-digit format prefixed with “EMD-” (i.e. EMD-XXXX) will advance to a 5-digit format (i.e. EMD-XXXXX), and so on. It is currently estimated that the 4-digit codes will be depleted around Spring 2019, at which point the 5-digit format will come into force.
  • The EM Navigator/Yorodumi systems omit the EMD- prefix.

Related info.:Q: What is EMD? / ID/Accession-code notation in Yorodumi/EM Navigator

External links:EMDB Accession Codes are Changing Soon! / Contact to PDBj

+
Jul 12, 2017. Major update of PDB

Major update of PDB

  • wwPDB released updated PDB data conforming to the new PDBx/mmCIF dictionary.
  • This is a major update changing the version number from 4 to 5, and with Remediation, in which all the entries are updated.
  • In this update, many items about electron microscopy experimental information are reorganized (e.g. em_software).
  • Now, EM Navigator and Yorodumi are based on the updated data.

External links:wwPDB Remediation / Enriched Model Files Conforming to OneDep Data Standards Now Available in the PDB FTP Archive

-
Yorodumi Papers

Database of articles cited by EMDB/PDB/SASBDB data

  • Database of articles cited by EMDB, PDB, and SASBDB entries
  • Using PubMed data

Related info.:EMDB / PDB / SASBDB / Yorodumi / EMN Papers / Changes in new EM Navigator and Yorodumi

Read more