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The C-Terminal Domain of Sin1 Interacts with the SWI-SNF Complex in Yeast

机译:Sin1的C末端域与酵母中的SWI-SNF复合体相互作用

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In the yeast Saccharomyces cerevisiae, the SWI-SNF complex has been proposed to antagonize the repressive effects of chromatin by disrupting nucleosomes. The SIN genes were identified as suppressors of defects in the SWI-SNF complex, and theSIN1 gene encodes an HMG1-like protein that has been proposed to be a component of chromatin. Specific mutations (sin mutations) in both histone H3 and H4 genes produce the same phenotypic effects as do mutations in the SIN1 gene. In this study, we demonstrate that Sin1 and the H3 and H4 histones interact genetically and that the C terminus of Sin1 physically associates with components of the SWI-SNF complex. In addition, we demonstrate that this interaction is blocked in the full-length Sin1 protein by the N-terminal half of the protein. Based on these and additional results, we propose that Sin1 acts as a regulatable bridge between the SWI-SNF complex and the nucleosome.
机译:在酵母中,SWI-SNF复合物被提议通过破坏核小体来拮抗染色质的抑制作用。 SIN 基因被鉴定为SWI-SNF复合体中的缺陷抑制剂, SIN1 基因编码一种HMG1样蛋白,该蛋白被认为是染色质的组成部分。 。组蛋白H3和H4基因中的特定突变( sin 突变)产生的表型效应与 SIN1 基因中的突变相同。在这项研究中,我们证明Sin1和H3和H4组蛋白在遗传上相互作用,并且Sin1的C末端与SWI-SNF复合体的成分物理关联。此外,我们证明了这种相互作用在全长Sin1蛋白中被该蛋白的N末端一半所阻断。基于这些和其他结果,我们建议Sin1充当SWI-SNF复杂与核小体之间的可调节桥梁。

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