HISTONE H3 & H33 ARE DISPENSABLE FOR VIABILITY AND CLR4-DEPENDENT TRANSPOSITION

这个子项目是许多研究子项目中利用 资源由NIH/NCRR资助的中心拨款提供。子项目和 调查员(PI)可能从NIH的另一个来源获得了主要资金， 并因此可以在其他清晰的条目中表示。列出的机构是 该中心不一定是调查人员的机构。 后生动物基因组和许多植物和真菌的基因组编码组蛋白H3和变异体H3.3的基因，这两种基因在 四个氨基酸位置。H3.3最近引起了人们的极大兴趣，因为与H3不同的是，它在 S期外的活跃基因。因此，有人提出，它在表观遗传中起着特殊的作用。 状态，例如由特定的组蛋白修饰所介导的状态。然而，据我们所知，去除H3.3的效果 目前还没有来自细胞的报道。因此，我们通过利用H3和H3.3这一事实来阐述其功能 每个都由遗传上易驯化的担子菌新生隐球菌中的一个基因座编码。作为一部分 在这项工作中，我们使用亲和纯化和MudPIT来表征H3和H3的可溶沉积络合物 H3.3。我们的研究揭示了新生葡萄球菌和人类之间对这些亚基的完美保守。 沉积复合体。

This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Metazoan genomes and those of many plants and fungi encode genes for histone H3 and the variant H3.3, which differ at four amino acid positions. H3.3 has garnered much interest recently because, in contrast to H3, it displays deposition at active genes outside of S phase. It has therefore been proposed that it plays a specific role in the inheritance of epigenetic states, such as those mediated by specific histone modifications. However, to our knowledge, the effect of removing H3.3 from cells has not been reported. We therefore addressed its function by taking advantage of the fact that H3 and H3.3 are each encoded by a single locus in the genetically tractable basidiomycetous fungus, Cryptococcus neoformans. As part of this effort we are using affinity purification and MudPIT to characterize the soluble deposition complexes for H3 and H3.3. Our studies have revealed perfect conservation between C. neoformans and humans of the subunits of these deposition complexes.