Tian M, Loidl J (2018) A chromatin-associated protein required for inducing and limiting meiotic DNA double-strand break formation. Nucleic acids research ( ): PUBMED:30357385
Ali EI, Loidl J, Howard-Till RA (2018) A streamlined cohesin apparatus is sufficient for mitosis and meiosis in the protist Tetrahymena. Chromosoma ( ): PUBMED:29948142
Type IIB DNA topoisomerase family protein
Required for meiotic DNA DSBs. Required for the elongation of meiotic nuclei and full chromosome pairing in Tetrahymena
SPO11 Meiosis-specific protein
that initiates meiotic recomb
ination by catalyzing the form
ation of double-strand breaks
in DNA via a transesterificati
on reaction; required for homo
logous chromosome pairing and
synaptonemal complex formation
Spo11p induces DSBs and at the same time triggers the elongation of meiotic nuclei (crescents) via an ATR-dependent response in Tetrahymena. The crescent resembles the conserved bouquet arrangement and the fission yeast horsetail nucleus. It promotes meiotic chromosome pairing. Thus, by nuclear elongation and the ensuing close juxtapositioning of homologous chromosome regions within the tubular nucleus, Spo11p ensures that DSBs formed by its activity can be repaired by homologous recombination.
Associated Literature
Ref:28621664: Akematsu T, Fukuda Y, Garg J, Fillingham JS, Pearlman RE, Loidl J (2017) Post-meiotic DNA double-strand breaks occur in Tetrahymena, and require Topoisomerase II and Spo11. eLife 6( ):
Ref:20422424: Lukaszewicz A, Howard-Till RA, Novatchkova M, Mochizuki K, Loidl J (2010) MRE11 and COM1/SAE2 are required for double-strand break repair and efficient chromosome pairing during meiosis of the protist Tetrahymena. Chromosoma 119(5):505-18
Ref:19297526: Loidl J, Mochizuki K (2009) Tetrahymena meiotic nuclear reorganization is induced by a checkpoint kinase-dependent response to DNA damage. Molecular biology of the cell 20(9):2428-37
Ref:18522989: Mochizuki K, Novatchkova M, Loidl J (2008) DNA double-strand breaks, but not crossovers, are required for the reorganization of meiotic nuclei in Tetrahymena. Journal of cell science 121(Pt 13):2148-58