{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,30]],"date-time":"2026-09-30T18:31:08Z","timestamp":1790793068853,"version":"4.1.0"},"reference-count":148,"publisher":"MDPI AG","issue":"14","license":[{"start":{"date-parts":[[2022,7,19]],"date-time":"2022-07-19T00:00:00Z","timestamp":1658188800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100000038","name":"the Natural Sciences and Engineering Research Council (NSERC) of Canada","doi-asserted-by":"publisher","award":["RGPN-2020-04585"],"award-info":[{"award-number":["RGPN-2020-04585"]}],"id":[{"id":"10.13039\/501100000038","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>An advanced understanding of sperm function is relevant for evidence-based male fertility prediction and addressing male infertility. A standard breeding soundness evaluation (BSE) merely identifies gross abnormalities in bulls, whereas selection based on single nucleotide polymorphisms and genomic estimated breeding values overlooks sub-microscopic differences in sperm. Molecular tools are important for validating genomic selection and advancing knowledge on the regulation of male fertility at an interdisciplinary level. Therefore, research in this field is now focused on developing a combination of in vitro sperm function tests and identifying biomarkers such as sperm proteins with critical roles in fertility. The Na+-K+ ATPase is a ubiquitous transmembrane protein and its \u03b14 isoform (ATP1A4) is exclusively expressed in germ cells and sperm. Furthermore, ATP1A4 is essential for male fertility, as it interacts with signaling molecules in both raft and non-raft fractions of the sperm plasma membrane to regulate capacitation-associated signaling, hyperactivation, sperm-oocyte interactions, and activation. Interestingly, ATP1A4 activity and expression increase during capacitation, challenging the widely accepted dogma of sperm translational quiescence. This review discusses the literature on the role of ATP1A4 during capacitation and fertilization events and its prospective use in improving male fertility prediction.<\/jats:p>","DOI":"10.3390\/ijms23147936","type":"journal-article","created":{"date-parts":[[2022,7,19]],"date-time":"2022-07-19T05:37:53Z","timestamp":1658209073000},"page":"7936","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":19,"title":["Testis-Specific Isoform of Na+-K+ ATPase and Regulation of Bull Fertility"],"prefix":"10.3390","volume":"23","author":[{"given":"Saurabh","family":"Tiwari","sequence":"first","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gayathri","family":"Rajamanickam","sequence":"additional","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Veena","family":"Unnikrishnan","sequence":"additional","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mina","family":"Ojaghi","sequence":"additional","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"John P.","family":"Kastelic","sequence":"additional","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jacob C.","family":"Thundathil","sequence":"additional","affiliation":[{"name":"Department of Production Animal Health, Faculty of Veterinary Medicine, University of Calgary, Calgary, AB T2N 4N1, Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,7,19]]},"reference":[{"key":"ref_1","unstructured":"FAO (2018). 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