SPATA33 localizes calcineurin to the mitochondria and regulates sperm motility in mice

Calcineurin is a calcium-dependent phosphatase that plays roles in a variety of biological processes including immune responses. In spermatozoa, there is a testis-enriched calcineurin composed of PPP3CC and PPP3R2 (sperm calcineurin) that is essential for sperm motility and male fertility. Because s...

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Veröffentlicht in:Proceedings of the National Academy of Sciences - PNAS 2021-08, Vol.118 (35), p.1-9
Hauptverfasser: Miyata, Haruhiko, Oura, Seiya, Morohoshi, Akane, Shimada, Keisuke, Mashiko, Daisuke, Oyama, Yuki, Kaneda, Yuki, Matsumura, Takafumi, Abbasi, Ferheen, Ikawa, Masahito
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container_issue 35
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container_title Proceedings of the National Academy of Sciences - PNAS
container_volume 118
creator Miyata, Haruhiko
Oura, Seiya
Morohoshi, Akane
Shimada, Keisuke
Mashiko, Daisuke
Oyama, Yuki
Kaneda, Yuki
Matsumura, Takafumi
Abbasi, Ferheen
Ikawa, Masahito
description Calcineurin is a calcium-dependent phosphatase that plays roles in a variety of biological processes including immune responses. In spermatozoa, there is a testis-enriched calcineurin composed of PPP3CC and PPP3R2 (sperm calcineurin) that is essential for sperm motility and male fertility. Because sperm calcineurin has been proposed as a target for reversible male contraceptives, identifying proteins that interact with sperm calcineurin widens the choice for developing specific inhibitors. Here, by screening the calcineurin-interacting PxIxIT consensus motif in silico and analyzing the function of candidate proteins through the generation of gene-modified mice, we discovered that SPATA33 interacts with sperm calcineurin via a PQIIIT sequence. Spata33 knockout mice exhibit reduced sperm motility because of an inflexible midpiece, leading to impaired male fertility, which phenocopies Ppp3cc and Ppp3r2 knockout mice. Further analysis reveals that sperm calcineurin disappears from the mitochondria in the Spata33 knockout testis. In addition, immunoprecipitation analysis indicates that sperm calcineurin interacts with not only SPATA33 but also the mitochondrial protein VDAC2. These results indicate that SPATA33 localizes calcineurin to the mitochondria and regulates sperm motility.
doi_str_mv 10.1073/pnas.2106673118
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In spermatozoa, there is a testis-enriched calcineurin composed of PPP3CC and PPP3R2 (sperm calcineurin) that is essential for sperm motility and male fertility. Because sperm calcineurin has been proposed as a target for reversible male contraceptives, identifying proteins that interact with sperm calcineurin widens the choice for developing specific inhibitors. Here, by screening the calcineurin-interacting PxIxIT consensus motif in silico and analyzing the function of candidate proteins through the generation of gene-modified mice, we discovered that SPATA33 interacts with sperm calcineurin via a PQIIIT sequence. Spata33 knockout mice exhibit reduced sperm motility because of an inflexible midpiece, leading to impaired male fertility, which phenocopies Ppp3cc and Ppp3r2 knockout mice. Further analysis reveals that sperm calcineurin disappears from the mitochondria in the Spata33 knockout testis. 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subjects Animals
Biological activity
Biological Sciences
Calcineurin
Calcineurin - genetics
Calcineurin - metabolism
Calcium
Contraceptives
Female
Fertility
Immune response
Immunoprecipitation
Intercellular Signaling Peptides and Proteins - physiology
Male
Males
Mice
Mice, Knockout
Mitochondria
Mitochondria - metabolism
Motility
Proteins
Rodents
Sperm
Sperm Motility
Spermatogenesis
Spermatozoa
Testes
Testis - physiology
Voltage-Dependent Anion Channel 2 - genetics
Voltage-Dependent Anion Channel 2 - metabolism
title SPATA33 localizes calcineurin to the mitochondria and regulates sperm motility in mice
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