Transient and Partial Nuclear Lamina Disruption Promotes Chromosome Movement in Early Meiotic Prophase.

Dev Cell 2018 04;45(2):212-225.e7

Department of Chromosome Biology, Max F. Perutz Laboratories, University of Vienna, Vienna Biocenter, 1030 Vienna, Austria. Electronic address:

Meiotic chromosome movement is important for the pairwise alignment of homologous chromosomes, which is required for correct chromosome segregation. Movement is driven by cytoplasmic forces, transmitted to chromosome ends by nuclear membrane-spanning proteins. In animal cells, lamins form a prominent scaffold at the nuclear periphery, yet the role lamins play in meiotic chromosome movement is unclear. We show that chromosome movement correlates with reduced lamin association with the nuclear rim, which requires lamin phosphorylation at sites analogous to those that open lamina network crosslinks in mitosis. Failure to remodel the lamina results in delayed meiotic entry, altered chromatin organization, unpaired or interlocked chromosomes, and slowed chromosome movement. The remodeling kinases are delivered to lamins via chromosome ends coupled to the nuclear envelope, potentially enabling crosstalk between the lamina and chromosomal events. Thus, opening the lamina network plays a role in modulating contacts between chromosomes and the nuclear periphery during meiosis.

Download full-text PDF

Source
https://linkinghub.elsevier.com/retrieve/pii/S15345807183023
Publisher Site
http://dx.doi.org/10.1016/j.devcel.2018.03.018DOI Listing
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5920155PMC
April 2018
10 Reads

Publication Analysis

Top Keywords

chromosome movement
20
lamina network
8
chromosome ends
8
meiotic chromosome
8
chromosome
8
nuclear periphery
8
nuclear
6
movement
6
lamina
5
analogous open
4
open lamina
4
lamina delayed
4
sites analogous
4
phosphorylation sites
4
remodel lamina
4
network crosslinks
4
mitosis failure
4
crosslinks mitosis
4
delayed meiotic
4
meiotic entry
4

Similar Publications