Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence.
Autor(a) principal: | |
---|---|
Data de Publicação: | 2012 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
Texto Completo: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/940197 |
Resumo: | Background: In the leuphotrochozoan parasitic platyhelminth Schistosoma mansoni, male individuals are homogametic (ZZ) whereas females are heterogametic (ZW). To elucidate the mechanisms that led to the emergence of sex chromosomes, we compared the genomic sequence and the chromatin structure of male and female individuals. As for many eukaryotes, the lower estimate for the repeat content is 40%, with an unknown proportion of domesticated repeats. We used massive sequencing to de novo assemble all repeats, and identify unambiguously Z-specific, W-specific and pseudoautosomal regions of the S. mansoni sex chromosomes. Results: We show that 70 to 90% of S. mansoni W and Z are pseudoautosomal. No female-specific gene could be identified. Instead, the W-specific region is composed almost entirely of 36 satellite repeat families, of which 33 were previously unknown. Transcription and chromatin status of female-specific repeats are stage-specific: for those repeats that are transcribed, transcription is restricted to the larval stages lacking sexual dimorphism. In contrast, in the sexually dimorphic adult stage of the life cycle, no transcription occurs. In addition, the euchromatic character of histone modifications around the W-specific repeats decreases during the life cycle. Recombination repression occurs in this region even if homologous sequences are present on both the Z and W chromosomes. Conclusion: Our study provides for the first time evidence for the hypothesis that, at least in organisms with a ZW type of sex chromosomes, repeat-induced chromatin structure changes could indeed be the initial event in sex chromosome emergence. |
id |
EMBR_914d9ffcd0a4e662274ab2065e1d5732 |
---|---|
oai_identifier_str |
oai:www.alice.cnptia.embrapa.br:doc/940197 |
network_acronym_str |
EMBR |
network_name_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository_id_str |
2154 |
spelling |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence.SchistosomaBackground: In the leuphotrochozoan parasitic platyhelminth Schistosoma mansoni, male individuals are homogametic (ZZ) whereas females are heterogametic (ZW). To elucidate the mechanisms that led to the emergence of sex chromosomes, we compared the genomic sequence and the chromatin structure of male and female individuals. As for many eukaryotes, the lower estimate for the repeat content is 40%, with an unknown proportion of domesticated repeats. We used massive sequencing to de novo assemble all repeats, and identify unambiguously Z-specific, W-specific and pseudoautosomal regions of the S. mansoni sex chromosomes. Results: We show that 70 to 90% of S. mansoni W and Z are pseudoautosomal. No female-specific gene could be identified. Instead, the W-specific region is composed almost entirely of 36 satellite repeat families, of which 33 were previously unknown. Transcription and chromatin status of female-specific repeats are stage-specific: for those repeats that are transcribed, transcription is restricted to the larval stages lacking sexual dimorphism. In contrast, in the sexually dimorphic adult stage of the life cycle, no transcription occurs. In addition, the euchromatic character of histone modifications around the W-specific repeats decreases during the life cycle. Recombination repression occurs in this region even if homologous sequences are present on both the Z and W chromosomes. Conclusion: Our study provides for the first time evidence for the hypothesis that, at least in organisms with a ZW type of sex chromosomes, repeat-induced chromatin structure changes could indeed be the initial event in sex chromosome emergence.JULIE M. J. LEPESANT, Université de Perpignan Via Domitia; CÉLINE COSSEAU, Université de Perpignan Via Domitia; JÉROME BOISSIER, Université de Perpignan Via Domitia; MICHAEL FREITAG, Oregon State University; JULIEN PORTELA, Université de Perpignan Via Domitia; DÉBORAH CLIMENT, Université de Perpignan Via Domitia; CÉCILE PERRIN, Université de Perpignan Via Domitia; ADHEMAR ZERLOTINI NETO, CNPTIA; CHRISTOPH GRUNAU, Université de Perpignan Via Domitia.LEPESANT, J. M. J.COSSEAU, C.BOISSIER, J.FREITAG, M.PORTELA, J.CLIMENT, D.PERRIN, C.ZERLOTINI, A.GRUNAU, C.2020-04-15T00:58:37Z2020-04-15T00:58:37Z2012-11-2120122020-04-15T00:58:37Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article15 p.Genome Biology, v. 13, 2012.http://www.alice.cnptia.embrapa.br/alice/handle/doc/94019710.1186/gb-2012-13-2-r14enginfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice)instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa)instacron:EMBRAPA2020-04-15T00:58:45Zoai:www.alice.cnptia.embrapa.br:doc/940197Repositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestopendoar:21542020-04-15T00:58:45falseRepositório InstitucionalPUBhttps://www.alice.cnptia.embrapa.br/oai/requestcg-riaa@embrapa.bropendoar:21542020-04-15T00:58:45Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa)false |
dc.title.none.fl_str_mv |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
title |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
spellingShingle |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. LEPESANT, J. M. J. Schistosoma |
title_short |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
title_full |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
title_fullStr |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
title_full_unstemmed |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
title_sort |
Chromatin structural changes around satellite repeats on the female sex chromosome in Schistosoma mansoni and their possible role in sex chromosome emergence. |
author |
LEPESANT, J. M. J. |
author_facet |
LEPESANT, J. M. J. COSSEAU, C. BOISSIER, J. FREITAG, M. PORTELA, J. CLIMENT, D. PERRIN, C. ZERLOTINI, A. GRUNAU, C. |
author_role |
author |
author2 |
COSSEAU, C. BOISSIER, J. FREITAG, M. PORTELA, J. CLIMENT, D. PERRIN, C. ZERLOTINI, A. GRUNAU, C. |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
JULIE M. J. LEPESANT, Université de Perpignan Via Domitia; CÉLINE COSSEAU, Université de Perpignan Via Domitia; JÉROME BOISSIER, Université de Perpignan Via Domitia; MICHAEL FREITAG, Oregon State University; JULIEN PORTELA, Université de Perpignan Via Domitia; DÉBORAH CLIMENT, Université de Perpignan Via Domitia; CÉCILE PERRIN, Université de Perpignan Via Domitia; ADHEMAR ZERLOTINI NETO, CNPTIA; CHRISTOPH GRUNAU, Université de Perpignan Via Domitia. |
dc.contributor.author.fl_str_mv |
LEPESANT, J. M. J. COSSEAU, C. BOISSIER, J. FREITAG, M. PORTELA, J. CLIMENT, D. PERRIN, C. ZERLOTINI, A. GRUNAU, C. |
dc.subject.por.fl_str_mv |
Schistosoma |
topic |
Schistosoma |
description |
Background: In the leuphotrochozoan parasitic platyhelminth Schistosoma mansoni, male individuals are homogametic (ZZ) whereas females are heterogametic (ZW). To elucidate the mechanisms that led to the emergence of sex chromosomes, we compared the genomic sequence and the chromatin structure of male and female individuals. As for many eukaryotes, the lower estimate for the repeat content is 40%, with an unknown proportion of domesticated repeats. We used massive sequencing to de novo assemble all repeats, and identify unambiguously Z-specific, W-specific and pseudoautosomal regions of the S. mansoni sex chromosomes. Results: We show that 70 to 90% of S. mansoni W and Z are pseudoautosomal. No female-specific gene could be identified. Instead, the W-specific region is composed almost entirely of 36 satellite repeat families, of which 33 were previously unknown. Transcription and chromatin status of female-specific repeats are stage-specific: for those repeats that are transcribed, transcription is restricted to the larval stages lacking sexual dimorphism. In contrast, in the sexually dimorphic adult stage of the life cycle, no transcription occurs. In addition, the euchromatic character of histone modifications around the W-specific repeats decreases during the life cycle. Recombination repression occurs in this region even if homologous sequences are present on both the Z and W chromosomes. Conclusion: Our study provides for the first time evidence for the hypothesis that, at least in organisms with a ZW type of sex chromosomes, repeat-induced chromatin structure changes could indeed be the initial event in sex chromosome emergence. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-11-21 2012 2020-04-15T00:58:37Z 2020-04-15T00:58:37Z 2020-04-15T00:58:37Z |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/publishedVersion info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
Genome Biology, v. 13, 2012. http://www.alice.cnptia.embrapa.br/alice/handle/doc/940197 10.1186/gb-2012-13-2-r14 |
identifier_str_mv |
Genome Biology, v. 13, 2012. 10.1186/gb-2012-13-2-r14 |
url |
http://www.alice.cnptia.embrapa.br/alice/handle/doc/940197 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
15 p. |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) instname:Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA |
instname_str |
Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
instacron_str |
EMBRAPA |
institution |
EMBRAPA |
reponame_str |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
collection |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) |
repository.name.fl_str_mv |
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA - Alice) - Empresa Brasileira de Pesquisa Agropecuária (Embrapa) |
repository.mail.fl_str_mv |
cg-riaa@embrapa.br |
_version_ |
1794503491720314880 |