Dynamics of homologous chromosome pairing during meiotic prophase in fission yeast

被引:207
作者
Ding, DQ
Yamamoto, A
Haraguchi, T
Hiraoka, Y
机构
[1] Kansai Adv Res Ctr, CREST Res Project, Nishi Ku, Kobe, Hyogo 6512492, Japan
[2] Osaka Univ, Dept Biol, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan
关键词
D O I
10.1016/S1534-5807(04)00059-0
中图分类号
Q2 [细胞生物学];
学科分类号
071009 ; 090102 ;
摘要
Pairing of homologous chromosomes is important for homologous recombination and correct chromosome segregation during meiosis. It has been proposed that telomere clustering, nuclear oscillation, and recombination during meiotic prophase facilitate homologous chromosome pairing in fission yeast. Here we examined the contributions of these chromosomal events to homologous chromosome pairing, by directly observing the dynamics of chromosomal loci in living cells of fission yeast. Homologous loci exhibited a dynamic process of association and dissociation during the time course of meiotic prophase. Lack of nuclear oscillation reduced association frequency for both centromeric and arm regions of the chromosome. Lack of telomere clustering or recombination reduced association frequency at arm regions, but not significantly at centromeric regions. Our results indicate that homologous chromosomes are spatially aligned by oscillation of telomere-bundled chromosomes and physically linked by recombination at chromosome arm regions; this recombination is not required for association of homologous centromeres.
引用
收藏
页码:329 / 341
页数:13
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