Protein translation in mammalian spermatozoa
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Tipo de documento: | Dissertação |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/24212 |
Resumo: | Reversible protein phosphorylation is the key general mechanism for regulating vital sperm cells functions since sperm cells are highly compartmentalized and almost devoid of transcription and translation. However, there is a small area of uncondensed chromatin where transcription and translation are still possible. There is only one study in the literature showing protein synthesis occurs in spermatozoa during capacitation. The main goal of this work was to study if protein translation occurs, both in human and bovine spermatozoa. In order to achieve that, we monitored protein synthesis using the Surface Sensing of Translation (SUnSET) technique, followed by flow cytometry. The results revealed mRNA translation in spermatozoa. Furthermore, we analysed the impact of translation inhibition by mitochondrial and cytoplasmic ribosomes in the expression levels of diverse spermatozoa proteins. The results show that, while some proteins are affected by translation inhibitors, others remain stable. To conclude, our results support protein synthesis occurs in spermatozoa and show, for the first time, SUnSET technique allows to monitor and quantify the global protein synthesis in mammalian spermatozoa. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Protein translation in mammalian spermatozoaTranslationPermatozoaTranslation inhibitionSurface sensing of translationReversible protein phosphorylation is the key general mechanism for regulating vital sperm cells functions since sperm cells are highly compartmentalized and almost devoid of transcription and translation. However, there is a small area of uncondensed chromatin where transcription and translation are still possible. There is only one study in the literature showing protein synthesis occurs in spermatozoa during capacitation. The main goal of this work was to study if protein translation occurs, both in human and bovine spermatozoa. In order to achieve that, we monitored protein synthesis using the Surface Sensing of Translation (SUnSET) technique, followed by flow cytometry. The results revealed mRNA translation in spermatozoa. Furthermore, we analysed the impact of translation inhibition by mitochondrial and cytoplasmic ribosomes in the expression levels of diverse spermatozoa proteins. The results show that, while some proteins are affected by translation inhibitors, others remain stable. To conclude, our results support protein synthesis occurs in spermatozoa and show, for the first time, SUnSET technique allows to monitor and quantify the global protein synthesis in mammalian spermatozoa.A fosforilação proteica reversível é o principal mecanismo que regula as funções vitais dos espermatozóides, uma vez que, os espermatozóides são altamente compartimentados e praticamente desprovidos de transcrição e tradução. No entanto, existe uma pequena área de cromatina descondensada, na qual a transcrição e tradução ainda são possíveis. Existe apenas um estudo na literatura a demonstrar que ocorre síntese proteica nos espermatozóides durante a capacitação. O principal objetivo deste trabalho foi avaliar se a síntese proteica ocorre em espermatozoides de bovino e de humano. Deste modo, monitorizámos a síntese proteica, utilizando a técnica Surface Sensing of Translation (SUnSET), seguida de citometria de fluxo. Os resultados revelaram tradução de mRNA nos espermatozóides. Para além disso, avaliamos o impacto da inibição da tradução pelos ribossomas mitocondriais e citoplasmáticos nos níveis de expressão de diversas proteínas do espermatozoide. Os resultados demonstraram que, enquanto algumas proteínas são afetadas pelos inibidores da tradução, outras mantêm-se estáveis. Concluindo, os nossos resultados suportam que ocorre síntese proteica nos espermatozoides e demonstram, pela primeira vez, que a técnica SUnSET permite monitorizar e quantificar a síntese global de proteínas em espermatozoides de mamíferos.2020-07-17T00:00:00Z2018-07-11T00:00:00Z2018-07-11info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10773/24212TID:202235513engNunes, João Cláudio Fonsecainfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T11:47:34Zoai:ria.ua.pt:10773/24212Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T02:57:57.476829Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Protein translation in mammalian spermatozoa |
title |
Protein translation in mammalian spermatozoa |
spellingShingle |
Protein translation in mammalian spermatozoa Nunes, João Cláudio Fonseca Translation Permatozoa Translation inhibition Surface sensing of translation |
title_short |
Protein translation in mammalian spermatozoa |
title_full |
Protein translation in mammalian spermatozoa |
title_fullStr |
Protein translation in mammalian spermatozoa |
title_full_unstemmed |
Protein translation in mammalian spermatozoa |
title_sort |
Protein translation in mammalian spermatozoa |
author |
Nunes, João Cláudio Fonseca |
author_facet |
Nunes, João Cláudio Fonseca |
author_role |
author |
dc.contributor.author.fl_str_mv |
Nunes, João Cláudio Fonseca |
dc.subject.por.fl_str_mv |
Translation Permatozoa Translation inhibition Surface sensing of translation |
topic |
Translation Permatozoa Translation inhibition Surface sensing of translation |
description |
Reversible protein phosphorylation is the key general mechanism for regulating vital sperm cells functions since sperm cells are highly compartmentalized and almost devoid of transcription and translation. However, there is a small area of uncondensed chromatin where transcription and translation are still possible. There is only one study in the literature showing protein synthesis occurs in spermatozoa during capacitation. The main goal of this work was to study if protein translation occurs, both in human and bovine spermatozoa. In order to achieve that, we monitored protein synthesis using the Surface Sensing of Translation (SUnSET) technique, followed by flow cytometry. The results revealed mRNA translation in spermatozoa. Furthermore, we analysed the impact of translation inhibition by mitochondrial and cytoplasmic ribosomes in the expression levels of diverse spermatozoa proteins. The results show that, while some proteins are affected by translation inhibitors, others remain stable. To conclude, our results support protein synthesis occurs in spermatozoa and show, for the first time, SUnSET technique allows to monitor and quantify the global protein synthesis in mammalian spermatozoa. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-07-11T00:00:00Z 2018-07-11 2020-07-17T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/masterThesis |
format |
masterThesis |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/24212 TID:202235513 |
url |
http://hdl.handle.net/10773/24212 |
identifier_str_mv |
TID:202235513 |
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 |
application/pdf |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
repository.mail.fl_str_mv |
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1799137633911177216 |