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The mechanism of 3' cleavage and polyadenylation of eukaryotic pre-mRNA
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Étude de miR-128 et d'un de ses transcrits cibles de fonction inconnue, SZRD1
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Year: 2013 Publisher: Bruxelles: UCL. Faculté de pharmacie et des sciences biomédicales,

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ln this work, we attempted to determine the function of SZRDl,a protein of unknown function using a multidimensional approach. Our selection of SZRDl was based on the presence of four putative binding sites for miR-128 in its 3'UTR.Mi-RNAs are small RNAs that inhibit translation and promote mRNA degradation of target transcripts. They usually have many targets, but effects on individual targets are often modest. Small changes in target transcripts are therefore thought to collaborate to lead to a cellular function. We therefore hypothesized that uncharacterized targets of a mi-RNA might functionally collaborate with other targets of the same mi-RNA. To test this hypothesis we focused on miR-128 and one of its predicted targets of unknown function, SZRDl. MiR-128 targets are implicated in cellular signaling pathways and in a RNA quality control mechanism called Nonsense-Mediated Decay (NMD). we hypothesized that SZRDl could be implicated in the function’s exerted by miR-128.First, we demonstrated that the conserved multiple binding site of miR-128 in the 3'UTR of SZRDl are indeed functional using luciferase reporter genes.The analysis of SZRDl protein function followed a multidimensional approach based on primary sequence analysis, existing high-throughput data and identification of possible partners through tandem affinity purification followed by mass spectrometry:The SZRDl gene gives rise to several transcripts that code for proteins of 133 and 154 amino acids (SZRDl Long and SZRDl Short). We showed that SZRDl Long is excluded from the nuclei, possibly through a predicted nuclear export sequence (NES), and that SZRDl Short is phosphorylated in a cell cycle-dependent manner.We identified several proteins implicated in various aspects of RNA metabolism as interactors of SZRDl: RENTl/UPFl,STRAP, ClQBP, UNR/CSDEl and GEMIN2.We provide preliminary evidence that SZRDl might regulate the function of its interactors RENTl/UPFl and STRAP.Notably, RENTl/UPFl has previously been identified as a target of miR-128. Our data therefore are consistent with the hypothesisthat target genes of miR-128 functionally collaborate. Dans le cadre de ce mémoire, nous avons cherché à établir la fonction de SZRDl en utilisant une approche multidimensionelle. C'est la présence de quatre sites de liaisons potentiels au miR-128 dans la région 3'non traduite (3'UTR) de SZRDl qui a guidé notre choix vers cette protéine.Les mi-ARNs sont de courts ARNs simple brin qui inhibent la traduction et/ou favorisent la dégradation de leurs transcrits cibles. Dans la plupart des cas, chaque mi-ARN possède un grand nombre de cibles mais l'effet sur chacune d'entre elles est souvent modeste. Ilest donc possible que l'association de ces faibles mais nombreux changements ait une importance fonctionnelle. Nous avons donc émis l'hypothèse qu'une cible non caractérisée d'un mi-ARN pourraient collaborer avec d'autres cibles de ce même mi-ARN. Nous avons testé cette hypothèse en étudiant le miR-128 et une de ses cibles prédites mais dont la fonction est inconnue, SZRDl. Les cibles connues du miR-128 jouent un rôle dans la signalisation cellulaire et dans un mécanisme de contrôle de la qualité des ARNs appelé « Nonsense-Mediated Decay » ou NMD. Dès lors, nous avons émis l'hypothèse selon laquelle la protéine SZRDl pourrait être impliquée dans les fonctions connues de miR-128.Nous avons tout d'abord démontré, grâce à un test rapporteur luciférase, que les sites de liaisons conservés pour le miR-128 présents dans la région 3'UTR de SZRDl sont fonctionnels et que SZRDl semble bien être une cible du miR-128. Afin de déterminer la fonction de SZRDl,nous avons utilisé une approche multidimensionnelle basée sur l'analyse de la séquence primaire en résidus aminés de la protéine, sur des données issues d'analyses à haut débit et sur l'identification de partenaires potentiels par purification d'affinité en tandem suivie de spectrométrie de masse :Le gène SZRDl donne lieu à plusieurs transcrits codants pour des protéines de 133 et 154 résidus aminés (SZRDl Courte et SZRDl Longue, respectivement) . Nous avons montré que SZRDl Longue peut être exclue du noyau, probablement dû à la présence d'une séquence d'export nucléaire (NES) et que SZRDl Courte est phosphorylée à certains stades du cycle cellulaire.Nous avons identifié plusieurs protéines interactantes de SZRDl qui sont impliquées à différents niveaux du métabolisme de I'ARN : RENTl/UPFl, STRAP, ClQBP, UNR/CSDl et GEMIN2.Nous avons obtenus des données préliminaires suggérant que SZRDl est capable de réguler,la fonction de certaines de ses protéines partenaires comme RENTl/UPFl et STRAP.Il est important de noter que RENTl/UPFl a également été décrit comme étant une cible du miR- 1Nos données sont donc en accord avec l'hypothèse selon laquelle les gènes cibles du miR- 128 collaborent fonctionnellement.


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RNA Diseases in Humans – From Fundamental Research to Therapeutic Applications
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Year: 2019 Publisher: Frontiers Media SA

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Book
RNA Diseases in Humans – From Fundamental Research to Therapeutic Applications
Authors: --- ---
Year: 2019 Publisher: Frontiers Media SA

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Abstract

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Book
RNA Diseases in Humans – From Fundamental Research to Therapeutic Applications
Authors: --- ---
Year: 2019 Publisher: Frontiers Media SA

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Abstract

This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Dissertation
Normal and abnormal expression of the human adenosine deaminase gene : a molecular analysis
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Year: 1988 Publisher: Amsterdam Rodopi

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Current Advances in the Research of RNA Regulatory Enzymes
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Year: 2020 Publisher: Frontiers Media SA

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Book
Current Advances in the Research of RNA Regulatory Enzymes
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Year: 2020 Publisher: Frontiers Media SA

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Book
Current Advances in the Research of RNA Regulatory Enzymes
Authors: ---
Year: 2020 Publisher: Frontiers Media SA

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact


Book
Plant RNA Biology
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Year: 2019 Publisher: Frontiers Media SA

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

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