Suppr超能文献

蛋白质在四膜虫大核和小核中的细胞核特异性及时间限制定位。

Nucleus-specific and temporally restricted localization of proteins in Tetrahymena macronuclei and micronuclei.

作者信息

White E M, Allis C D, Goldfarb D S, Srivastva A, Weir J W, Gorovsky M A

机构信息

Department of Biology, University of Rochester, New York 14627.

出版信息

J Cell Biol. 1989 Nov;109(5):1983-92. doi: 10.1083/jcb.109.5.1983.

Abstract

Labeled nuclear proteins were microinjected into the cytoplasm of Tetrahymena thermophila. Macronuclear H1, calf thymus H1, and the SV40 large T antigen nuclear localization signal linked to BSA accumulated specifically in macronuclei, even if cells were in micronuclear S phase or were nonreplicating. The way in which histone H4 localized to either the macronucleus or the micronucleus suggested that it accumulates in whichever nucleus is replicating. The inability of the micronucleus to accumulate Tetrahymena H1 or heterologous nuclear proteins, even at a period in the cell cycle when it is accumulating H4, suggests that it has a specialized transport system. These studies demonstrate that although the mechanism for localizing proteins to nuclei is highly conserved among eukaryotes, it can differ between two porecontaining nuclei lying in the same cytoplasm.

摘要

将标记的核蛋白显微注射到嗜热四膜虫的细胞质中。即使细胞处于微核S期或不进行复制,大核H1、小牛胸腺H1以及与牛血清白蛋白相连的SV40大T抗原核定位信号也会特异性地积累在大核中。组蛋白H4定位到大核或微核的方式表明,它会在正在进行复制的任何一个核中积累。即使在细胞周期中微核积累H4的时期,微核也无法积累嗜热四膜虫H1或异源核蛋白,这表明它具有专门的转运系统。这些研究表明,尽管真核生物中蛋白质定位到细胞核的机制高度保守,但位于同一细胞质中的两个含孔细胞核之间的机制可能不同。

相似文献

引用本文的文献

4
Regulation of nucleocytoplasmic transport in skeletal muscle.核质转运在骨骼肌中的调控。
Curr Top Dev Biol. 2011;96:273-302. doi: 10.1016/B978-0-12-385940-2.00010-3.

本文引用的文献

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验