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Genes & Development
Article
License: CC BY NC
Data sources: UnpayWall
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PubMed Central
Other literature type . 2014
License: CC BY NC
Data sources: PubMed Central
Genes & Development
Article . 2014 . Peer-reviewed
Data sources: Crossref
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Meiosis-specific cohesin mediates homolog recognition in mouse spermatocytes

Authors: Kei-ichiro Ishiguro; Jihye Kim; Hiroki Shibuya; Abrahan Hernández-Hernández; Aussie Suzuki; Tatsuo Fukagawa; Go Shioi; +5 Authors

Meiosis-specific cohesin mediates homolog recognition in mouse spermatocytes

Abstract

During meiosis, homologous chromosome (homolog) pairing is promoted by several layers of regulation that include dynamic chromosome movement and meiotic recombination. However, the way in which homologs recognize each other remains a fundamental issue in chromosome biology. Here, we show that homolog recognition or association initiates upon entry into meiotic prophase before axis assembly and double-strand break (DSB) formation. This homolog association develops into tight pairing only during or after axis formation. Intriguingly, the ability to recognize homologs is retained in Sun1 knockout spermatocytes, in which telomere-directed chromosome movement is abolished, and this is the case even in Spo11 knockout spermatocytes, in which DSB-dependent DNA homology search is absent. Disruption of meiosis-specific cohesin RAD21L precludes the initial association of homologs as well as the subsequent pairing in spermatocytes. These findings suggest the intriguing possibility that homolog recognition is achieved primarily by searching for homology in the chromosome architecture as defined by meiosis-specific cohesin rather than in the DNA sequence itself.

Keywords

Male, Endodeoxyribonucleases, Chromosomal Proteins, Non-Histone, Cell Cycle Proteins, Chromosomes, Mice, Inbred C57BL, Chromosome Pairing, Gene Knockout Techniques, Meiosis, Mice, Spermatocytes, Animals, Female, Microtubule-Associated Proteins, Cohesins, In Situ Hybridization, Fluorescence, Research Paper

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    citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    135
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 1%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Top 1%
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
135
Top 1%
Top 10%
Top 1%
Green
Published in a Diamond OA journal
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