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. 2000 Sep;156(1):59–68. doi: 10.1093/genetics/156.1.59

A family of cAMP-response-element-related DNA sequences with meiotic recombination hotspot activity in Schizosaccharomyces pombe.

M E Fox 1, T Yamada 1, K Ohta 1, G R Smith 1
PMCID: PMC1461235  PMID: 10978275

Abstract

The heptamer sequence ATGACGT is essential for activity of the M26 meiotic recombination hotspot in the ade6 gene of Schizosaccharomyces pombe. Hotspot activity is associated with binding of the heterodimeric transcription factor Atf1.Pcr1 to M26. We have found that the sequences (C/T/G) TGACGT also bound Atf1.Pcr1 and acted as meiotic hotspots, but unlike M26 they must be followed by A or C for Atf1.Pcr1 binding and hotspot activity. The basis of the hotspot activity of CTGACGTA (ade6-3013) appears to be identical to that of M26: hotspot activity of both sequences was abolished in cells mutant for atf1, pcr1, spc1, or wis1 and was undetectable in mitotic recombination and in meiotic recombination when located on a plasmid. Both hotspot sequences were sites of micrococcal nuclease hypersensitivity in meiotic chromatin, suggesting that they create an open chromatin structure during meiosis at the site of the hotspots. The newly identified hotspot sequences (C/T/G)TGACGT(A/C) and M26 are closely related to the cAMP response element (CRE) consensus sequence for binding of cAMP-responsive transcription factors such as Atf1.Pcr1, suggesting a link between transcription and meiotic recombination. These results significantly expand the list of identified sequences with meiotic recombination hotspot activity in S. pombe from a single sequence to a family of CRE-related sequences.

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Selected References

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