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Sequence, expression, and chromosomal assignment of a human sperm outer dense fiber gene
O Gastmann1, P Burfeind, E Günther
1Department of Human Genetics, University of Göttingen, Germany.
Molecular Reproduction and Development
|December 1, 1993
Summary
Researchers identified a novel human gene encoding a sperm tail protein crucial for sperm motility. This discovery may help understand male infertility linked to sperm tail defects.
Area of Science:
- Spermatogenesis
- Human genetics
- Molecular biology
Background:
- Outer dense fibers (ODFs) are vital structural components of mammalian sperm tails.
- ODFs contribute to the passive elastic properties and recoil of sperm tails, essential for motility.
Purpose of the Study:
- To identify and characterize a human gene homologous to the Drosophila Mst(3)CGP gene family.
- To investigate the gene's expression, protein product, and chromosomal localization.
- To explore the potential role of this gene in human male infertility.
Main Methods:
- Gene identification and sequencing.
- Northern and Southern blot analyses.
- Antiserum production and Western blotting.
- In situ hybridization for gene localization.
Main Results:
- A human gene encoding a 241-amino acid ODF protein was identified.
- The gene is specifically expressed in the testis.
- An ODF protein of approximately 32 kDa was detected in human sperm flagella.
- The ODF gene was localized to chromosome 8q22.
Conclusions:
- The identified human ODF gene is specifically expressed in male germ cells.
- This gene encodes a protein component of sperm outer dense fibers.
- This finding offers a molecular basis for investigating male infertility associated with sperm tail abnormalities.