一个矩阵/支架附着区域的结合蛋白:识别,净化和结合方式
J P von Kries1, H Buhrmester, W H Strätling
1Physiologisch-Chemisches Institut, Universitäts-Krankenhaus Eppendorf, Hamburg, Federal Republic of Germany.
Cell
|January 11, 1991
概括
研究人员发现了一种蛋白,ARBP,它与矩阵/支架附着区域 (MARs) 结合. 这种丰富的核蛋白质对于通过合作地结合MARs来形成功能性染色质循环至关重要.
科学领域:
- 分子生物学分子生物学
- 遗传学 是一个遗传学.
- 细胞生物学 细胞生物学
背景情况:
- 矩阵/支架附着区域 (MAR/SARs) 是定义染色质环域的DNA元素.
- 负责MAR结合和染色体组织的蛋白质仍然不完全理解.
研究的目的:
- 为了识别和描述与MARs结合的蛋白质.
- 阐明MAR结合蛋白在染色质结构和功能中的作用.
主要方法:
- 从核提取物中净化蛋白质.
- 使用肉酶位MAR和来自其他物种的MAR的MAR结合试验.
- 对删除和二元化突变的分析,以了解结合机制.
主要成果:
- 鉴定和净化一种新的蛋白,ARBP (附着区域结合蛋白).
- ARBP选择性地以合作方式与来自不同物种的MAR结合.
- ARBP结合依赖于MAR中的多个AT丰富序列,并且可以发生在很远的距离上,这表明DNA循环.
- ARBP是一种丰富的核蛋白,是内部核网络的一部分.
结论:
- ARBP 是一个关键的核因子,参与了功能性染色体循环的生成.
- ARBP与MAR的合作性和长距离结合性质对于其在染色体组织中的作用至关重要.
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