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TitleBudding yeast chromatin is dispersed in a crowded nucleoplasm in vivo.
Journal, issue, pagesMol Biol Cell, Vol. 27, Issue 21, Page 3357-3368, Year 2016
Publish dateNov 1, 2016
AuthorsChen Chen / Hong Hwa Lim / Jian Shi / Sachiko Tamura / Kazuhiro Maeshima / Uttam Surana / Lu Gan /
PubMed AbstractChromatin organization has an important role in the regulation of eukaryotic systems. Although recent studies have refined the three-dimensional models of chromatin organization with high resolution ...Chromatin organization has an important role in the regulation of eukaryotic systems. Although recent studies have refined the three-dimensional models of chromatin organization with high resolution at the genome sequence level, little is known about how the most fundamental units of chromatin-nucleosomes-are positioned in three dimensions in vivo. Here we use electron cryotomography to study chromatin organization in the budding yeast Saccharomyces cerevisiae Direct visualization of yeast nuclear densities shows no evidence of 30-nm fibers. Aside from preribosomes and spindle microtubules, few nuclear structures are larger than a tetranucleosome. Yeast chromatin does not form compact structures in interphase or mitosis and is consistent with being in an "open" configuration that is conducive to high levels of transcription. From our study and those of others, we propose that yeast can regulate its transcription using local nucleosome-nucleosome associations.
External linksMol Biol Cell / PubMed:27605704 / PubMed Central
MethodsEM (tomography)
Structure data

EMDB-8157:
Electron cryotomogram of a cryosectioned budding yeast S. cerevisiae cell
Method: EM (tomography)

Source
  • Saccharomyces cerevisiae (brewer's yeast)

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