Tcte2, or t complex testes expressed 2, is a male meiosis-specific gene located on band 3.3 of mouse chromosome 17. It is crucial for normal male meiosis, with its function potentially linked to pathways involved in male fertility. Genetic models, especially mouse models, are valuable for studying its role in male reproductive processes [1].

The Tcte2 gene expresses a coding mRNA and several putative non-ORF transcripts during meiosis I. A deletion of the 5' part of the locus on the t haplotype form of chromosome 17 abolishes Tcte2 expression. Also, the non-ORF RNAs at the Tcte2 locus are differentially spliced in species that show hybrid sterility when crossed with laboratory mice. These findings suggest Tcte2 alleles as candidates for loci contributing to both meiotic drive and hybrid sterility phenotypes [1].

In conclusion, Tcte2 is essential for male meiosis. The identification of its role through studies in mouse models, such as the deletion-based observations, provides insights into the molecular mechanisms underlying male fertility-related issues like meiotic drive and hybrid sterility. Understanding Tcte2's function may contribute to a better understanding of male reproductive biology and potentially related infertility conditions [1].

References:

1. Braidotti, G, Barlow, D P. . Identification of a male meiosis-specific gene, Tcte2, which is differentially spliced in species that form sterile hybrids with laboratory mice and deleted in t chromosomes showing meiotic drive. In Developmental biology, 186, 85-99. doi:. https://pubmed.ncbi.nlm.nih.gov/9188755/