Abstract
Homologous recombination is initiated in meiotic eukaryotic cells at DNA double-strand breaks, which are generated by several proteins, Spo11p playing a key role. The protein products of SPO11 orthologs are highly conserved, are found in most eukaryotes from plants to human, and are structurally similar to subunit A of archaeal DNA topoisomerase VI. Saccharomyces cerevisiae SPO11 is expressed in meiotic prophase I. Spo11p acts as topoisomerase II and is presumably active as a dimer. Experimental data on Spo11p compartmentalization in vegetative yeast cells are unavailable. The SPO11 coding region and its fragments were fused in frame with the egfp reporter and expressed in vegetative yeast cells. The Spo11p-EGFP fusion was localized in the nucleus, while cytoplasmic localization was observed for Spo11Δ-EGFP devoid of the 25 N-terminal residues. N-terminal Spo11p region 7–25 fused with EGFP ensured the nuclear targeting of the reporter protein and was assumed to harbor the nuclear localization signal.
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Original Russian Text © R.A. Komakhin, V.V. Komakhina, 2008, published in Molekulyarnaya Biologiya, 2008, Vol. 42, No. 3, pp. 494–500.
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Komakhin, R.A., Komakhina, V.V. Compartmentalization of Spo11p in vegetative cells of yeast Saccharomyces cerevisiae . Mol Biol 42, 436–441 (2008). https://doi.org/10.1134/S0026893308030126
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DOI: https://doi.org/10.1134/S0026893308030126