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The CENP-A nucleosome

机译:CENP-A核小体

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The structure of the centromere-specific histone centromeric protein A (CENP-A) nucleosome has been a hot topic of debate for the past five years. Structures proposed include octamers, hexamers, homotypic and heterotypic tetramers. This controversy has led to the proposal that CENP-A nucleosomes undergo cell-cycle dependent transitions between the multiple states previously documented to exist in vivo and in vitro. In recent work from our laboratory, we sought to test this hypothesis. We discovered that CENP-A nucleosomes undergo unique oscillations in human cells, a finding mirrored in a parallel study performed in budding yeast. This review provides additional insights into the potential mechanisms for the interconversion of CENP-A nucleosomal species, and speculates on a biological role for oscillations in vivo.
机译:着丝粒特异性组蛋白着丝粒蛋白A(CENP-A)核小体的结构在过去五年中一直是争论的热点。提出的结构包括八聚物,六聚物,同型和异型四聚物。这一争议导致了这样的提议,即CENP-A核小体在先前被证明存在于体内和体外的多种状态之间经历细胞周期依赖性转变。在我们实验室的最新工作中,我们试图检验这一假设。我们发现CENP-A核小体在人细胞中经历独特的振荡,这一发现在发芽酵母中进行的一项平行研究中得到了反映。这篇综述提供了有关CENP-A核小体物种相互转化的潜在机制的更多见解,并推测了体内振荡的生物学作用。

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