Abstract：
:The synaptonemal complex is an elaborate meiosis-specific supramolecular protein assembly that promotes chromosome synapsis and meiotic recombination. We inactivated the meiosis-specific gene Tex12 and found that TEX12 is essential for progression of meiosis in both male and female germ cells. Structural analysis of the synaptonemal complex in Tex12-/- meiocytes revealed a disrupted central element structure, a dense structure residing between the synapsed homologous chromosomes. Chromosome synapsis is initiated at multiple positions along the paired homologous chromosomes in Tex12-/- meiotic cells, but fails to propagate along the chromosomes. Furthermore, although meiotic recombination is initiated in Tex12-/- meiotic cells, these early recombination events do not develop into meiotic crossovers. Hence, the mere initiation of synapsis is not sufficient to support meiotic crossing-over. Our results show that TEX12 is a component of the central element structure of the synaptonemal complex required for propagation of synapsis along the paired homologous chromosomes and maturation of early recombination events into crossovers.
journal_name
J Cell Scijournal_title
Journal of cell scienceauthors
Hamer G,Wang H,Bolcun-Filas E,Cooke HJ,Benavente R,Höög Cdoi
10.1242/jcs.033233subject
Has Abstractpub_date
2008-08-01 00:00:00pages
2445-51issue
Pt 15eissn
0021-9533issn
1477-9137pii
jcs.033233journal_volume
121pub_type
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