SUN1 is required for telomere attachment to nuclear envelope and gametogenesis in mice.

Journal Article (Journal Article)

Prior to the pairing and recombination between homologous chromosomes during meiosis, telomeres attach to the nuclear envelope and form a transient cluster. However, the protein factors mediating meiotic telomere attachment to the nuclear envelope and the requirement of this attachment for homolog pairing and synapsis have not been determined in animals. Here we show that the inner nuclear membrane protein SUN1 specifically associates with telomeres between the leptotene and diplotene stages during meiotic prophase I. Disruption of Sun1 in mice prevents telomere attachment to the nuclear envelope, efficient homolog pairing, and synapsis formation in meiosis. Massive apoptotic events are induced in the mutant gonads, leading to the abolishment of both spermatogenesis and oogenesis. This study provides genetic evidence that SUN1-telomere interaction is essential for telomere dynamic movement and is required for efficient homologous chromosome pairing/synapsis during mammalian gametogenesis.

Full Text

Duke Authors

Cited Authors

  • Ding, X; Xu, R; Yu, J; Xu, T; Zhuang, Y; Han, M

Published Date

  • June 2007

Published In

Volume / Issue

  • 12 / 6

Start / End Page

  • 863 - 872

PubMed ID

  • 17543860

International Standard Serial Number (ISSN)

  • 1534-5807

Digital Object Identifier (DOI)

  • 10.1016/j.devcel.2007.03.018


  • eng

Conference Location

  • United States