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Analyses of linker histone - chromatin interactions in situ
Linköping University, Faculty of Health Sciences. Linköping University, Department of Clinical and Experimental Medicine, Cell Biology.
2006 (English)In: Biochemistry and Cell Biology, ISSN 0829-8211, Vol. 84, no 4, 427-436 p.Article in journal (Refereed) Published
Abstract [en]

Recent studies, using cytometric techniques based on fluorescence microscopy, have provided new information on how linker histones interact with chromatin in vivo or in situ. In particular, the use of green fluorescent proteins (GFPs) has enabled detailed studies of how individual H1 subtypes, and specific motifs in them, interact with chromatin in vivo. Furthermore, the development of cytochemical methods to study the interaction between linker histones and chromatin using DNA-binding fluorochromes as indirect probes for linker histone affinity in situ, in combination with highly sensitive and specific analytical methods, has provided additional information on the interactions between linker histones and chromatin in several cell systems. Such results verified that linker histones have a substantially higher affinity for chromatin in mature chicken erythrocytes than in frog erythrocytes, and they also indicated that the affinity decreased during differentiation of the frog erythrocytes. Furthermore, in cultured human fibroblasts, the linker histones showed a relatively high affinity for chromatin in interphase, whereas it showed a significantly lower affinity in highly condensed metaphase chromosomes. This method also enables the analysis of linker histone affinity for chromatin in H1-depleted fibroblasts reconstituted with purified linker histones. No consistent correlation between linker histone affinity and chromatin condensation has so far been detected.

Place, publisher, year, edition, pages
2006. Vol. 84, no 4, 427-436 p.
Keyword [en]
chromatin, linker histones, image cytofluorometry, high-performance capillary electrophoresis, hydrophillic interaction, liquid chromatography
National Category
Medical and Health Sciences
URN: urn:nbn:se:liu:diva-45998DOI: 10.1139/O06-071OAI: diva2:266894
Available from: 2009-10-11 Created: 2009-10-11 Last updated: 2011-01-11

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Rundquist, Ingemar
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