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Related Experiment Videos

Tctex2: a sperm tail surface protein mapping to the t-complex

L Y Huw1, A S Goldsborough, K Willison

  • 1Department of Zoology, University of Texas at Austin 78712-1064, USA.

Developmental Biology
|July 1, 1995
PubMed
Summary

Transmission ratio distortion (TRD) in mice involves complex genetics. Aberrant Tctex2 protein in the t-haplotype may interfere with sperm function, potentially explaining TRD and male sterility.

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Area of Science:

  • Genetics
  • Reproductive Biology
  • Molecular Biology

Background:

  • Meiotic drive is a phenomenon where certain genes bias their own inheritance.
  • Transmission ratio distortion (TRD) in mouse t-haplotypes is a prominent example of meiotic drive in vertebrates.
  • The precise molecular mechanisms underlying TRD are not fully understood.

Purpose of the Study:

  • To investigate the role of Tctex2 (t-complex testis expressed 2) in mouse t-haplotype-mediated TRD.
  • To characterize the t-haplotype form of Tctex2 and its potential functional implications.

Main Methods:

  • Mapping of Tctex2 to the t-complex region.
  • Analysis of Tctex2 expression levels and amino acid sequence in the t-haplotype.
  • Localization studies of Tctex2 protein in sperm.

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Main Results:

  • Tctex2 maps to the mouse t-complex.
  • The t-haplotype form of Tctex2 exhibits aberrant expression levels and an altered amino acid sequence.
  • Despite alterations, Tctex2 is translated and localized to the sperm tail.

Conclusions:

  • The aberrant Tctex2 protein, due to multiple amino acid changes, is unlikely to function normally.
  • Its presence on sperm tails suggests a potential role in interfering with normal male gamete function.
  • Tctex2 is a strong candidate for involvement in t-complex TRD and associated male sterility.