Zswim2, Zinc finger SWIM-type containing 2, is a testis-specific gene. It is one of the identified evolutionarily conserved testis-specific E3 ubiquitin-protein ligases. Ubiquitination is a crucial post-translational modification for protein homeostasis, and Zswim2 may be involved in related regulatory pathways in the testis [1].

Using the CRISPR/Cas9 system to generate Zswim2 knockout (KO) mice, researchers found that male fertility, male reproductive organ, and sperm-associated parameters were largely unaffected in Zswim2 KO males. This indicates that Zswim2 may not be essential for male fecundity, at least under the experimental conditions [1].

In conclusion, Zswim2 is a testis-specific E3 ubiquitin-protein ligase. Although Zswim2 KO mouse model shows that it may not be crucial for male fecundity, further studies are needed to fully understand its role in testis-related biological processes. The use of the KO mouse model provides a valuable research approach to explore the function of Zswim2 in vivo.