« Previous AbstractMetabolic changes in Citrus leaf volatiles in response to environmental stress    Next AbstractComparative Study on Volatile Compounds of Alpinia japonica and Elettaria cardamomum »

Mol Biol Cell

Title:		Dissociation of the Nuf2-Ndc80 complex releases centromeres from the spindle-pole body during meiotic prophase in fission yeast
Author(s):		Asakawa H; Hayashi A; Haraguchi T; Hiraoka Y;
Address:		"Cell Biology Group and CREST Research Project, Kansai Advanced Research Center, National Institute of Information and Communications Technology, Kobe 651-2492, Japan"
Journal Title:		Mol Biol Cell
Year:		2005
Volume:		20050223
Issue:		5
Page Number:		2325 - 2338
DOI:		10.1091/mbc.e04-11-0996
ISSN/ISBN:		1059-1524 (Print) 1059-1524 (Linking)
Abstract:		"In the fission yeast Schizosaccharomyces pombe, centromeres remain clustered at the spindle-pole body (SPB) during mitotic interphase. In contrast, during meiotic prophase centromeres dissociate from the SPB. Here we examined the behavior of centromere proteins in living meiotic cells of S. pombe. We show that the Nuf2-Ndc80 complex proteins (Nuf2, Ndc80, Spc24, and Spc25) disappear from the centromere in meiotic prophase when the centromeres are separated from the SPB. The centromere protein Mis12 also dissociates during meiotic prophase; however, Mis6 remains throughout meiosis. When cells are induced to meiosis by inactivation of Pat1 kinase (a key negative regulator of meiosis), centromeres remain associated with the SPB during meiotic prophase. However, inactivation of Nuf2 by a mutation causes the release of centromeres from the SPB in pat1 mutant cells, suggesting that the Nuf2-Ndc80 complex connects centromeres to the SPB. We further found that removal of the Nuf2-Ndc80 complex from the centromere and centromere-SPB dissociation are caused by mating pheromone signaling. Because pat1 mutant cells also show aberrant chromosome segregation in the first meiotic division and this aberration is compensated by mating pheromone signaling, dissociation of the Nuf2-Ndc80 complex may be associated with remodeling of the kinetochore for meiotic chromosome segregation"
Keywords:		"Base Sequence Cell Cycle Proteins/genetics/metabolism Centromere/metabolism DNA, Fungal/genetics DNA-Binding Proteins Genes, Fungal Green Fluorescent Proteins/genetics/metabolism Kinetochores/metabolism Meiosis Models, Biological Nuclear Proteins/genetics;"
Notes:		"MedlineAsakawa, Haruhiko Hayashi, Aki Haraguchi, Tokuko Hiraoka, Yasushi eng Research Support, Non-U.S. Gov't 2005/02/25 Mol Biol Cell. 2005 May; 16(5):2325-38. doi: 10.1091/mbc.e04-11-0996. Epub 2005 Feb 23"