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The TRF1-binding protein TERB1 promotes chromosome movement and telomere rigidity in meiosis

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posted on 2023-06-07, 07:27 authored by Hiroki Shibuya, Kei-ichiro Ishiguro, Yoshinori Watanabe
During meiotic prophase, telomere-mediated chromosomal movement along the nuclear envelope is crucial for homologue pairing and synapsis. However, how telomeres are modified to mediate chromosome movement is largely elusive. Here we show that mammalian meiotic telomeres are fundamentally modified by a meiosis-specific Myb-domain protein, TERB1, that localizes at telomeres in mouse germ cells. TERB1 forms a heterocomplex with the canonical telomeric protein TRF1 and binds telomere repeat DNA. Disruption of Terb1 in mice abolishes meiotic chromosomal movement and impairs homologous pairing and synapsis, causing infertility in both sexes. TERB1 promotes telomere association with the nuclear envelope and deposition of the SUN–KASH complex, which recruits cytoplasmic motor complexes. TERB1 also binds and recruits cohesin to telomeres to develop structural rigidity, strikingly reminiscent of centromeres. Our study suggests that TERB1 acts as a central hub for the assembly of a conserved meiotic telomere complex required for chromosome movements

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Nature Cell Biology

ISSN

1465-7392

Publisher

Nature Research

Issue

2

Volume

16

Page range

145-156

Department affiliated with

  • Sussex Centre for Genome Damage Stability Publications

Research groups affiliated with

  • Genome Damage and Stability Centre Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2020-07-08

First Open Access (FOA) Date

2020-07-09

First Compliant Deposit (FCD) Date

2020-07-07

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