Abstract:
:In most cells, transcriptionally inactive heterochromatin is preferentially localized in the nuclear periphery and transcriptionally active euchromatin is localized in the nuclear interior. Different cell types display characteristic chromatin distribution patterns, which change dramatically during cell differentiation, proliferation, senescence and different pathological conditions. Chromatin organization has been extensively studied on a cell population level, but there is a need to understand dynamic reorganization of chromatin at the single cell level, especially in live cells. We have developed a novel image analysis tool that we term Fluorescence Ratiometric Imaging of Chromatin (FRIC) to quantitatively monitor dynamic spatiotemporal distribution of euchromatin and total chromatin in live cells. A vector (pTandemH) assures stoichiometrically constant expression of the histone variants Histone 3.3 and Histone 2B, fused to EGFP and mCherry, respectively. Quantitative ratiometric (H3.3/H2B) imaging displayed a concentrated distribution of heterochromatin in the periphery of U2OS cell nuclei. As proof of concept, peripheral heterochromatin responded to experimental manipulation of histone acetylation. We also found that peripheral heterochromatin depended on the levels of the inner nuclear membrane protein Samp1, suggesting an important role in promoting peripheral heterochromatin. Taken together, FRIC is a powerful and robust new tool to study dynamic chromatin redistribution in live cells.
journal_name
Nucleic Acids Resjournal_title
Nucleic acids researchauthors
Bergqvist C,Niss F,Figueroa RA,Beckman M,Maksel D,Jafferali MH,Kulyté A,Ström AL,Hallberg Edoi
10.1093/nar/gkz123subject
Has Abstractpub_date
2019-05-21 00:00:00pages
e49issue
9eissn
0305-1048issn
1362-4962pii
5356937journal_volume
47pub_type
杂志文章abstract::The temperature-sensitive Neurospora nuclear mutant cyt18-1 is deficient in splicing many Group I mitochondrial introns when grown at its non-permissive temperature; however, splicing of intron 1 in the coI gene of the Adiopodoume (formerly called North Africa) strain is unaffected (R.A. Collins and A.M. Lambowitz, J....
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journal_title:Nucleic acids research
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journal_title:Nucleic acids research
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journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/8.17.3757
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journal_title:Nucleic acids research
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journal_title:Nucleic acids research
pub_type: 杂志文章
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更新日期:1998-07-01 00:00:00
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pub_type: 杂志文章
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journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/gkw401
更新日期:2016-08-19 00:00:00
abstract::DNA and RNA guanine-quadruplexes (G4s) are stabilized by several cations, in particular by potassium and sodium ions. Generally, potassium stabilizes guanine-quartet assemblies to a larger extent than sodium; in this article we report about a higher-order G4 structure more stable in sodium than in potassium. Repeats o...
journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/gkw003
更新日期:2016-04-07 00:00:00
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更新日期:2012-04-01 00:00:00
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更新日期:1982-02-11 00:00:00
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journal_title:Nucleic acids research
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更新日期:2017-06-02 00:00:00
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journal_title:Nucleic acids research
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更新日期:2014-09-01 00:00:00
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journal_title:Nucleic acids research
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journal_title:Nucleic acids research
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更新日期:2014-08-01 00:00:00
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journal_title:Nucleic acids research
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更新日期:2004-08-02 00:00:00
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journal_title:Nucleic acids research
pub_type: 杂志文章
doi:10.1093/nar/gkw1165
更新日期:2017-01-25 00:00:00
abstract::DNA methylation is the best-studied epigenetic modification and describes the conversion of cytosine to 5-methylcytosine. The importance of this phenomenon is that aberrant promoter hypermethylation is a common occurrence in cancer and is frequently associated with gene silencing. Various techniques are currently avai...
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