کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2044787 | 1073434 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: MEL-28 Is Downstream of the Ran Cycle and Is Required for Nuclear-Envelope Function and Chromatin Maintenance MEL-28 Is Downstream of the Ran Cycle and Is Required for Nuclear-Envelope Function and Chromatin Maintenance](/preview/png/2044787.png)
SummaryEarly embryonic development depends on the faithful execution of basic cell biological processes whose coordination remains largely unknown. With a global network analysis, we found MEL-28 to be associated with two types of complexes, one implicated in nuclear-envelope function and the other in chromatin organization [1]. Here, we show that MEL-28, a protein that shuttles between the nucleus and the kinetochore during the cell cycle, is required for the structural and functional integrity of the nuclear envelope. In addition, mel-28(RNAi) embryos exhibit defects in chromosome condensation, pronuclear migration, kinetochore assembly, and spindle assembly. This combination of mel-28(RNAi) phenotypes resemble those caused by depleting members of the Ran cycle in C. elegans [2], a conserved cellular signaling pathway that is required for mitotic spindle assembly, nuclear-envelope reformation after mitosis, and nucleocytoplasmic exchange (reviewed in 3, 4, 5, 6, 7 and 8). Although MEL-28 localization to the nuclear periphery is not dependent on nuclear pore components, it is dependent on RAN-1 and other key components of the Ran cycle. Thus, MEL-28 is downstream of the Ran cycle and is required for both proper nuclear-envelope function and chromatin maintenance.
Journal: - Volume 16, Issue 17, 5 September 2006, Pages 1757–1763