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Black, Ben E.; Jansen, Lars E.T.; Maddox, Paul S.; Foltz, Daniel R.; Desai, Arshad B.; Shah, Jagesh V.; Cleveland, Don W.
Molecular cell, 01/2007, Letnik: 25, Številka: 2Journal Article
Active centromeres are marked by nucleosomes assembled with CENP-A, a centromere-specific histone H3 variant. The CENP-A centromere targeting domain (CATD), comprised of loop 1 and the α2 helix within the histone fold, is sufficient to target histone H3 to centromeres and to generate the same conformational rigidity to the initial subnucleosomal heterotetramer with histone H4 as does CENP-A. We now show in human cells and in yeast that depletion of CENP-A is lethal, but recruitment of normal levels of kinetochore proteins, centromere-generated mitotic checkpoint signaling, chromosome segregation, and viability can be rescued by histone H3 carrying the CATD. These data offer direct support for centromere identity maintained by a unique nucleosome that serves to distinguish the centromere from the rest of the chromosome.
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in: SICRIS
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