Yeast alpha 2 repressor positions nucleosomes in TRP1/ARS1 chromatin

Yeast alpha 2 repressor positions nucleosomes in TRP1/ARS1 chromatin
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酵母 α 2 阻遏蛋白在 TRP1/ARS1 染色质中定位核小体

DOI:
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发表时间:
1990
影响因子:
5.3
通讯作者:
R. Simpson
R. Simpson
中科院分区:
生物学2区
文献类型:
--
作者:
S. Roth;A. Dean;R. Simpson

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酵母α 2抑制因子在单倍体α和二倍体α / α细胞类型中抑制a-交配型特异性基因的表达。我们将α 2结合位点插入到多拷贝TRP1/ARS1酵母质粒中,并在α细胞和a/ α细胞中检测α 2对衍生质粒染色质结构的影响。虽然在a细胞中没有观察到对核小体位置的影响,但在α和a/ α细胞中,核小体精确而稳定地定位在α 2操作符两侧的序列上。此外,当α 2操作符位于TRP1基因上游时,α细胞和a/ α细胞中形成了一个扩展的定位核小体阵列,形成了一个在细胞中不存在的核小体,TRP1 mRNA的产生大大减少。这些数据表明,α 2导致核小体在TRP1/ARS1染色质中靠近其操作符的序列上定位,并表明染色质结构的变化可能与α 2抑制细胞类型特异性基因有关。
The yeast alpha 2 repressor suppresses expression of a-mating-type-specific genes in haploid alpha and diploid a/alpha cell types. We inserted the alpha 2-binding site into the multicopy TRP1/ARS1 yeast plasmid and examined the effects of alpha 2 on the chromatin structure of the derivative plasmids in alpha cells, and a/alpha cells. Whereas no effect on nucleosome position was observed in a cells, nucleosomes were precisely and stably positioned over sequences flanking the alpha 2 operator in alpha and a/alpha cells. In addition, when the alpha 2 operator was located upstream of the TRP1 gene, an extended array of positioned nucleosomes was formed in alpha cells and a/alpha cells, with formation of a nucleosome not present in a cells, and TRP1 mRNA production was substantially reduced. These data indicate that alpha 2 causes a positioning of nucleosomes over sequences proximal to its operator in TRP1/ARS1 chromatin and suggest that changes in chromatin structure may be related to alpha 2 repression of cell-type-specific genes.
DOI: 10.1093/nar/16.14.6677
发表时间: 1988-07-25
影响因子: 14.9
作者:
KORNBERG, RD;STRYER, L
通讯作者: STRYER, L
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DOI: 10.1128/mcb.8.1.309-320.1988
发表时间: 1988
影响因子: 5.3
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发表时间: 1986
影响因子: 11.1
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DOI: 10.1073/pnas.80.10.3035
发表时间: 1983-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
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通讯作者: HERSKOWITZ, I
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发表时间: 1981
影响因子: 5.6
作者:
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通讯作者: Herskowitz,I