Cloning, characterization, and localization of mouse and human SPO11

Genomics. 1999 Oct 15;61(2):156-69. doi: 10.1006/geno.1999.5955.


Spo11 is a meiosis-specific protein in yeast that has been found covalently bound to DNA double-strand breaks (DSBs) during the early stages of meiosis. These DSBs initiate homologous recombination, which is required for proper segregation of chromosomes and the generation of genetic diversity during meiosis. Here we report the cloning, characterization, tissue expression, and chromosomal localization of both mouse and human homologues of Spo11. The putative mouse and human proteins are 82% identical and share approximately 25% identity with other family members. Northern blot analysis revealed testis-specific expression for both genes, but RT-PCR results showed ubiquitous expression of at least a portion of Spo11 in mouse. Human SPO11 was also detected in several somatic tissues. Mouse Spo11 was localized to chromosome 2H4, and human SPO11 was localized to chromosome 20q13.2-q13.3, a region amplified in some breast and ovarian tumors.

MeSH terms

  • Alternative Splicing
  • Amino Acid Sequence
  • Animals
  • Base Sequence
  • Chromosome Mapping
  • Chromosomes, Human, Pair 20 / genetics*
  • Cloning, Molecular
  • Endodeoxyribonucleases
  • Esterases / genetics*
  • Esterases / metabolism*
  • Fungal Proteins / genetics
  • Fungal Proteins / metabolism
  • Humans
  • In Situ Hybridization, Fluorescence
  • Meiosis / genetics*
  • Mice
  • Molecular Sequence Data
  • Organ Specificity
  • Reverse Transcriptase Polymerase Chain Reaction
  • Saccharomyces cerevisiae / genetics*
  • Saccharomyces cerevisiae / metabolism*
  • Sequence Homology, Amino Acid
  • Transcription, Genetic


  • Fungal Proteins
  • Endodeoxyribonucleases
  • Esterases
  • meiotic recombination protein SPO11

Associated data

  • GENBANK/AF169385
  • GENBANK/AF169386