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Gene Review

Hst6  -  hybrid sterility 6

Mus musculus

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Disease relevance of Hst6

  • Our results argue that Dnahc8 is fundamental to flagellar organization and function in Domesticus, but not Spretus, and suggest that Dnahc8 is integral to both Hst6- and t-specific male infertility [1].

High impact information on Hst6

  • Thus, Hst-6 provides direct access to the molecular basis of t haplotype-specific alterations in sperm function that emanate from the t complex distal inversion [2].
  • We further show that an abnormality in sperm flagellar curvature deriving from interactions between t haplotypes and the M. spretus allele of Hst-6 is indistinguishable from one exhibited by sperm from mice carrying two t haplotypes [2].
  • More recent heterospecific breeding experiments between Mus spretus (Spretus) and Mus musculus domesticus (Domesticus) have mapped the primary source(s) of both "curlicue" and "whipless" to a small sub-locus of Hst6, Curlicue a (Ccua) [1].
  • An axonemal dynein at the Hybrid Sterility 6 locus: implications for t haplotype-specific male sterility and the evolution of species barriers [1].
  • In the present report, we have examined expression of the Hst6-specific flagellar assembly phenotype in sperm from mice homozygous for M. spretus-M. m. domesticus recombinant Chr 17 homologs whose breakpoints map within the Hst6 locus [3].

Biological context of Hst6

  • Further quantitative analyses of the "curlicue" phenotype produced by sperm derived from these same animals indicate that expression of this chronic flagellar curvature phenotype also derives from at least two elements, both mapping within the Hst6 locus [4].
  • Males heterozygous for the M. spretus allele of Hst6 and a t haplotype (Hst6(s)/t) are sterile, expressing an abnormality in sperm flagellar curvature ("curlicue") indistinguishable from one exhibited by sperm from t/t homozygotes [3].

Anatomical context of Hst6


Other interactions of Hst6

  • Previous studies of mice carrying heterospecific combinations of the t complex have revealed a 1-cM candidate locus, Hst6, for the distal-most of these factors, Tcd/Tcs2 [3].


  1. An axonemal dynein at the Hybrid Sterility 6 locus: implications for t haplotype-specific male sterility and the evolution of species barriers. Fossella, J., Samant, S.A., Silver, L.M., King, S.M., Vaughan, K.T., Olds-Clarke, P., Johnson, K.A., Mikami, A., Vallee, R.B., Pilder, S.H. Mamm. Genome (2000) [Pubmed]
  2. Hybrid sterility-6: a mouse t complex locus controlling sperm flagellar assembly and movement. Pilder, S.H., Olds-Clarke, P., Phillips, D.M., Silver, L.M. Dev. Biol. (1993) [Pubmed]
  3. Mapping and cloning recombinant breakpoints demarcating the hybrid sterility 6-specific sperm tail assembly defect. Samant, S.A., Fossella, J., Silver, L.M., Pilder, S.H. Mamm. Genome (1999) [Pubmed]
  4. High-resolution mapping of sperm function defects in the t complex fourth inversion. Redkar, A.A., Olds-Clarke, P., Dugan, L.M., Pilder, S.H. Mamm. Genome (1998) [Pubmed]
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