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Centromere domain organization and histone modifications
Södertörns högskola, Avdelning Naturvetenskap. Karolinska Institute.
Södertörns högskola, Avdelning Naturvetenskap. Karolinska Institute.
2002 (engelsk)Inngår i: Brazilian journal of medical and biological research, ISSN 0100-879X, E-ISSN 1414-431X, Vol. 35, nr 5, s. 499-507Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Centromere function requires the proper coordination of several subfunctions, such as kinetochore assembly, sister chromatid cohesion, binding of kinetochore microtubules, orientation of sister kinetochores to opposite spindle poles, and their movement towards the spindle poles. Centromere structure appears to be organized in different, separable domains in order to accomplish these functions. Despite the conserved nature of centromere functions, the molecular genetic definition of the DNA sequences that form a centromere in the yeasts Saccharomyces cerevisiae and Schizosaccharomyces pombe, in the fruit fly Drosophila melanogaster, and in humans has revealed little conservation at the level of centromere DNA sequences. Also at the protein level few centromere proteins are conserved in all of these four organisms and many are unique to the different organisms. The recent analysis of the centromere structure in the yeast S. pombe by electron microscopy and detailed immunofluorescence microscopy of Drosophila centromeres have brought to light striking similarities at the overall structural level between these centromeres and the human centromere. The structural organization of the centromere is generally multilayered with a heterochromaun domain and a central core/inner plate region, which harbors the outer plate structures of the kinetochore. It is becoming increasingly clear that the key factors for assembly and function of the centromere structure are the specialized histories and modified histones which are present in the centromeric heterochromatin and in the chromatin of the central core. Thus, despite the differences in the DNA sequences and the proteins that define a centromere, there is an overall structural similarity between centromeres in evolutionarily diverse eukaryotes.

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2002. Vol. 35, nr 5, s. 499-507
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URN: urn:nbn:se:sh:diva-15805DOI: 10.1590/S0100-879X2002000500001ISI: 000175800900001PubMedID: 12011934Scopus ID: 2-s2.0-0036259748OAI: oai:DiVA.org:sh-15805DiVA, id: diva2:508338
Tilgjengelig fra: 2012-03-08 Laget: 2012-03-07 Sist oppdatert: 2017-12-07bibliografisk kontrollert

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