Cytoskeletal forces span the nuclear envelope to coordinate meiotic chromosome pairing and synapsis.
Cytoskeletal forces span the nuclear envelope to coordinate meiotic chromosome pairing and synapsis.
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DOI:
10.1016/j.cell.2009.10.039
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发表时间:
2009-11-25
期刊:
影响因子:
64.5
通讯作者:
Dernburg AF
中科院分区:
文献类型:
--
作者:
Sato A;Isaac B;Phillips CM;Rillo R;Carlton PM;Wynne DJ;Kasad RA;Dernburg AF
Sexual reproduction requires the unique cell division called meiosis, in which a diploid cell undergoes a reductional division to generate haploid gametes. A hallmark of meiotic prophase is the formation of pairwise linkages between homologous chromosomes, which later enable them to segregate from each other. In most organisms the pairing of homologous chromosomes is reinforced by synapsis, the polymerization of the synaptonemal complex (SC) between paired chromosome axes. The primary questions addressed here are: 1) how pairing is accomplished and 2) how synapsis is regulated so that it occurs selectively between homologs. We provide evidence that a connection between the chromosomes and the microtubule cytoskeleton via a bridge across the nuclear envelope is critical for both of these mechanisms. Our results indicate the existence of a mechanism that uses dynein to assess homology before licensing SC polymerization. The molecular components of this mechanism are conserved from fungi to mammals.
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