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Selection of DNA sequences from interval 6 of the human Y chromosome with homology to a Y chromosomal fertility gene sequence of Drosophila hydei

Summary

An experimental approach towards the molecular analysis of the male fertility function, located in interval 6 of the human Y chromosome, is presented. This approach is not based on the knowledge of any gene product but on the assumption that the functional DNA structure of male fertility genes, evolutionary conserved with their position on the Y chromosome, may contain an evolutionary conserved frame structure or at least conserved sequence elements. We tested this hypothesis by using dhMiF1, a fertility gene sequence of the Y chromosome of Drosophila hydei, as a screening probe on a pool of cloned human Y-DNA sequences. We were able to select 10 human Y-DNA sequences of which 7 could be mapped to Y interval 6 (the pY6H sequence family). Since the only fertility gene of the human Y chromosome is mapped to the same Y interval, our working hypothesis seems to be strongly supported. Most interesting in this respect is the isolation of the Y-specific repetitive pY6H65 sequence. The pY6H65 locus extends to a length of at least 300 kb in Y interval 6 and has a locus-specific repetitive sequence organization, reminiscent of the functional DNA structure of Y chromosomal fertility genes of Drosophila. We identified the simple sequence family (CA)n as one sequence element conserved between the Drosophila dhMiFi fertility gene sequence and the homologous human Y-DNA sequences.

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Correspondence to P. Vogt.

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Vogt, P., Keil, R., Köhler, M. et al. Selection of DNA sequences from interval 6 of the human Y chromosome with homology to a Y chromosomal fertility gene sequence of Drosophila hydei. Hum Genet 86, 341–349 (1991). https://doi.org/10.1007/BF00201830

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Keywords

  • Internal Medicine
  • Gene Sequence
  • Gene Product
  • Metabolic Disease
  • Molecular Analysis