Search results for "transcripció"
showing 10 items of 45 documents
Homogeneity of Interspecific Hybrids Between Saccharomyces cerevisiae and Saccharomyces uvarum by Phenotypic and Transcriptional Analysis
2005
Oenological traits, such as temperature profile and production of certain metabolites, were tested for four interspecifc hybrids obtained by"spore to spore" crossing between Saccharomyces cerevisiae and Saccharomyces uvarum strains and uniformity of their inheritance was found. PCR/RFLP analysis of ITS regions was carried out to confirm the hybrid nature of the strains. They showed an additive profile with five bands of the respective 325, 230, 170 and 125 bp. Finally gene expression study was performed by comparative DNA macroarray analysis of the hybrids and the preliminary results showed that the global gene expression patterns of hybrids are remarkably similar to one another. In conclus…
Orazione funerale del Molto R.P. Ottavio Caetano
2013
Trascrizione dell'esemplare della seicentina Oratione funerale del Molto R.P. Ottavio Caetano, PAlermo, Gio. Battista Maringo, 1601.
Initiator-Directed Transcription: Fission Yeast Nmtl Initiator Directs Preinitiation Complex Formation and Transcriptional Initiation
2022
The initiator element is a core promoter element encompassing the transcription start site, which is found in yeast, Drosophila, and human promoters. This element is observed in TATA-less promoters. Several studies have defined transcription factor requirements and additional cofactors that are needed for transcription initiation of initiator-containing promoters. However, those studies have been performed with additional core promoters in addition to the initiator. In this work, we have defined the pathway of preinitiation complex formation on the fission yeast nmt1 gene promoter, which contains a functional initiator with striking similarity to the initiator of the human dihydrofolate red…
Chromatin-dependent regulation of RNA polymerases II and III activity throughout the transcription cycle
2015
The particular behaviour of eukaryotic RNA polymerases along different gene regions and amongst distinct gene functional groups is not totally understood. To cast light onto the alternative active or backtracking states of RNA polymerase II, we have quantitatively mapped active RNA polymerases at a high resolution following a new biotin-based genomic run-on (BioGRO) technique. Compared with conventional profiling with chromatin immunoprecipitation, the analysis of the BioGRO profiles in Saccharomyces cerevisiae shows that RNA polymerase II has unique activity profiles at both gene ends, which are highly dependent on positioned nucleosomes. This is the first demonstration of the in vivo infl…
A complete set of nascent transcription rates for yeast genes
2010
The amount of mRNA in a cell is the result of two opposite reactions: transcription and mRNA degradation. These reactions are governed by kinetics laws, and the most regulated step for many genes is the transcription rate. The transcription rate, which is assumed to be exercised mainly at the RNA polymerase recruitment level, can be calculated using the RNA polymerase densities determined either by run-on or immunoprecipitation using specific antibodies. The yeast Saccharomyces cerevisiae is the ideal model organism to generate a complete set of nascent transcription rates that will prove useful for many gene regulation studies. By combining genomic data from both the GRO (Genomic Run-on) a…
Genomics of mRNA turnover
2007
Most studies on eukaryotic gene regulation have focused on mature mRNA levels. Nevertheless, the steady-state mRNA level is the result of two opposing biological processes: transcription and degradation, both of which can be important points to regulate gene expression. It is now possible to determine the transcription and degradation rates (TR and DR), as well as the mRNA amount, for each gene using DNA chip technologies. In this way, each individual contribution to gene expression can be analysed. This review will deal with the techniques used for the genomic evaluation of TR and DR developed for the yeast Saccharomyces cerevisiae. They will be described in detail and their potential draw…
A genomic view of mRNA turnover in yeast
2011
The steady-state mRNA level is the result of two opposing processes: transcription and degradation; both of which can provide important points to regulate gene expression. In the model organism yeast Saccharomyces cerevisiae, it is now possible to determine, at the genomic level, the transcription and degradation rates, as well as the mRNA amount, using DNA chip or parallel sequencing technologies. In this way, the contribution of both rates to individual and global gene expressions can be analysed. Here we review the techniques used for the genomic evaluation of the transcription and degradation rates developed for this yeast, and we discuss the integration of the data obtained to fully an…
Análisis genómico de la interacción entre la transcripción y la degradación durante el recambio del mRNA en S. cerevisiae
2015
En eucariontes, el mRNA es transcrito en el núcleo, exportado hacia el citoplasma, traducido en proteínas y finalmente degradado. De esta manera, la expresión génica se describe como un sistema lineal. Un aspecto importante de la expresión génica consiste en mantener los niveles del mRNA, los cuales son el resultado de la interacción dinámica entre la tasa de transcripción y de degradación. Para mantener el equilibrio entre ambas tareas, es necesaria la existencia de mecanismos que comuniquen ambos procesos. Utilizando la levadura S. cerevisiae y mediante la técnica llamada Genomic Run On, estudié el recambio del mRNA.ElGenomic Run On permite medir a escala genómica la tasa de transcripción…
Liber Instrumentorum de la Catedral de Valencia : edición crítica y estudio
2013
La presente tesis doctoral tiene como objetivo la edición crítica y estudio del manuscrito 162 del archivo de la Catedral de Valencia, llamado "Liber Instrumentorum". Se trata del cartulario de la Catedral de Valencia, que fue dirigido y recopilado por el obispo Hugo de Lupià y Bagés (obispo de Valencia entre 1397 y 1427), el cual contiene documentos relacionados con la economía valenciana, relativos a donaciones, legados, diezmos, etc. y asuntos de carácter diocesano, a raíz de la conquista de Valencia por Jaime I el Conquistador, durante los siglos XIII, XIV y primer tercio del siglo XV. Pese a su indiscutible importancia, el manuscrito únicamente ha sido estudiado en profundidad en lo re…
Transcripció vídeos endocrinologia i nutrició II
2023
El document forma part dels materials docents programats mitjançant l'ajut del Servei de Política Lingüística de la Universitat de València. Es tracta de material docent de l’assignatura endocrinologia i nutrició II del Grau de Medicina. S’inclou la transcripció d’uns vídeos disponibles en obert amb aspectes teòrics de l’assignatura, en concret, del tema 17. This is teaching material for the endocrinology and nutrition II subject of the Degree in Medicine. It includes the transcription of some videos available in the open with theoretical aspects of the subject, specifically, topic 17.