The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary.
Prolific sheep have proven to be a valuable model to identify genes and mutations implicated in female fertility. In the Lacaune sheep breed, large variation in litter size is genetically determined by the segregation of a fecundity major gene influencing ovulation rate, named FecL and its prolific...
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Public Library of Science (PLoS)
2013-01-01
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| Series: | PLoS Genetics |
| Online Access: | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1003809&type=printable |
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| author | Laurence Drouilhet Camille Mansanet Julien Sarry Kamila Tabet Philippe Bardou Florent Woloszyn Jérome Lluch Grégoire Harichaux Catherine Viguié Danielle Monniaux Loys Bodin Philippe Mulsant Stéphane Fabre |
| author_facet | Laurence Drouilhet Camille Mansanet Julien Sarry Kamila Tabet Philippe Bardou Florent Woloszyn Jérome Lluch Grégoire Harichaux Catherine Viguié Danielle Monniaux Loys Bodin Philippe Mulsant Stéphane Fabre |
| author_sort | Laurence Drouilhet |
| collection | DOAJ |
| description | Prolific sheep have proven to be a valuable model to identify genes and mutations implicated in female fertility. In the Lacaune sheep breed, large variation in litter size is genetically determined by the segregation of a fecundity major gene influencing ovulation rate, named FecL and its prolific allele FecL(L) . Our previous work localized FecL on sheep chromosome 11 within a locus of 1.1 Mb encompassing 20 genes. With the aim to identify the FecL gene, we developed a high throughput sequencing strategy of long-range PCR fragments spanning the locus of FecL(L) carrier and non-carrier ewes. Resulting informative markers defined a new 194.6 kb minimal interval. The reduced FecL locus contained only two genes, insulin-like growth factor 2 mRNA binding protein 1 (IGF2BP1) and beta-1,4-N-acetyl-galactosaminyl transferase 2 (B4GALNT2), and we identified two SNP in complete linkage disequilibrium with FecL(L) . B4GALNT2 appeared as the best positional and expressional candidate for FecL, since it showed an ectopic expression in the ovarian follicles of FecL(L) /FecL(L) ewes at mRNA and protein levels. In FecL(L) carrier ewes only, B4GALNT2 transferase activity was localized in granulosa cells and specifically glycosylated proteins were detected in granulosa cell extracts and follicular fluids. The identification of these glycoproteins by mass spectrometry revealed at least 10 proteins, including inhibin alpha and betaA subunits, as potential targets of B4GALNT2 activity. Specific ovarian protein glycosylation by B4GALNT2 is proposed as a new mechanism of ovulation rate regulation in sheep, and could contribute to open new fields of investigation to understand female infertility pathogenesis. |
| format | Article |
| id | doaj-art-b3aa0d4e03c246feba00d815db59024e |
| institution | Kabale University |
| issn | 1553-7390 1553-7404 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Public Library of Science (PLoS) |
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| series | PLoS Genetics |
| spelling | doaj-art-b3aa0d4e03c246feba00d815db59024e2025-01-16T05:31:15ZengPublic Library of Science (PLoS)PLoS Genetics1553-73901553-74042013-01-0199e100380910.1371/journal.pgen.1003809The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary.Laurence DrouilhetCamille MansanetJulien SarryKamila TabetPhilippe BardouFlorent WoloszynJérome LluchGrégoire HarichauxCatherine ViguiéDanielle MonniauxLoys BodinPhilippe MulsantStéphane FabreProlific sheep have proven to be a valuable model to identify genes and mutations implicated in female fertility. In the Lacaune sheep breed, large variation in litter size is genetically determined by the segregation of a fecundity major gene influencing ovulation rate, named FecL and its prolific allele FecL(L) . Our previous work localized FecL on sheep chromosome 11 within a locus of 1.1 Mb encompassing 20 genes. With the aim to identify the FecL gene, we developed a high throughput sequencing strategy of long-range PCR fragments spanning the locus of FecL(L) carrier and non-carrier ewes. Resulting informative markers defined a new 194.6 kb minimal interval. The reduced FecL locus contained only two genes, insulin-like growth factor 2 mRNA binding protein 1 (IGF2BP1) and beta-1,4-N-acetyl-galactosaminyl transferase 2 (B4GALNT2), and we identified two SNP in complete linkage disequilibrium with FecL(L) . B4GALNT2 appeared as the best positional and expressional candidate for FecL, since it showed an ectopic expression in the ovarian follicles of FecL(L) /FecL(L) ewes at mRNA and protein levels. In FecL(L) carrier ewes only, B4GALNT2 transferase activity was localized in granulosa cells and specifically glycosylated proteins were detected in granulosa cell extracts and follicular fluids. The identification of these glycoproteins by mass spectrometry revealed at least 10 proteins, including inhibin alpha and betaA subunits, as potential targets of B4GALNT2 activity. Specific ovarian protein glycosylation by B4GALNT2 is proposed as a new mechanism of ovulation rate regulation in sheep, and could contribute to open new fields of investigation to understand female infertility pathogenesis.https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1003809&type=printable |
| spellingShingle | Laurence Drouilhet Camille Mansanet Julien Sarry Kamila Tabet Philippe Bardou Florent Woloszyn Jérome Lluch Grégoire Harichaux Catherine Viguié Danielle Monniaux Loys Bodin Philippe Mulsant Stéphane Fabre The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. PLoS Genetics |
| title | The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. |
| title_full | The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. |
| title_fullStr | The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. |
| title_full_unstemmed | The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. |
| title_short | The highly prolific phenotype of Lacaune sheep is associated with an ectopic expression of the B4GALNT2 gene within the ovary. |
| title_sort | highly prolific phenotype of lacaune sheep is associated with an ectopic expression of the b4galnt2 gene within the ovary |
| url | https://journals.plos.org/plosgenetics/article/file?id=10.1371/journal.pgen.1003809&type=printable |
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