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Splicing in murine CABYR and its genomic structure.
Buer Sen1, Arabinda Mandal, Michael J Wolkowicz
1Department of Urology, Winship Cancer Institute, Emory University, Atlanta, GA 30322, USA.
Gene
|June 13, 2003
Summary
Researchers identified an authentic mouse ortholog of human CABYR, a testis-specific protein crucial for sperm motility. This finding advances understanding of sperm function and male fertility regulation.
Area of Science:
- Reproductive Biology
- Molecular Genetics
- Sperm Physiology
Background:
- Human calcium-binding tyrosine-phosphorylation regulated protein (CABYR) is a testis-specific protein involved in sperm capacitation and motility.
- CABYR contains functional motifs suggesting roles in sperm function, including a PKA RII-alpha homologous domain and Ca(++) binding sites.
Purpose of the Study:
- To clone and characterize mouse orthologs of CABYR (mCABYR).
- To compare nucleotide and protein sequences of mouse and human CABYR.
- To analyze the genomic organization and identify splice variants of mCABYR.
Main Methods:
- Cloning of four mouse orthologous CABYR cDNAs and genomic DNA.
- Sequence comparison between mouse and human CABYR.
- Analysis of mCABYR gene structure, including exons and splice variants.
Main Results:
- Identified and characterized mCABYR, showing 81% nucleotide identity with human CABYR.
- mCABYR exhibits conserved functional motifs and localizes to the principal piece of mouse sperm tail.
- Discovered two testis-specific mCABYR transcripts and three splice variants, with similarities to human CABYR transcripts.
Conclusions:
- An authentic murine ortholog of human CABYR has been identified, confirming conserved function and structure.
- The identified mCABYR and its variants provide a valuable model for studying CABYR's role in sperm motility and male fertility.
- Exon 4 of CABYR is a potential target for genetic manipulation due to its conservation across species.