Global ETD Search

21	Functional Genetic Analysis Reveals Intricate Roles of Conserved X-box Elements in Yeast Transcriptional Regulation Voll, Sarah January 2013 (has links) Understanding the functional impact of physical interactions between proteins and DNA on gene expression is important for developing approaches to correct disease-associated gene dysregulation. I conducted a systematic, functional genetic analysis of protein-DNA interactions in the promoter region of the yeast ribonucleotide reductase subunit gene RNR3. I measured the transcriptional impact of systematically perturbing the major transcriptional regulator, Crt1, and three X-box sites on the DNA known to physically bind Crt1. This analysis revealed interactions between two of the three X-boxes in the presence of Crt1, and unexpectedly, a significant functional role of the X-boxes in the absence of Crt1. Further analysis revealed Crt1- independent regulators of RNR3 that were impacted by X-box perturbation. Taken together, these results support the notion that higher-order X-box-mediated interactions are important for RNR3 transcription, and that the X-boxes have unexpected roles in the regulation of RNR3 transcription that extend beyond their interaction with Crt1. functional genetic analysis transcription factor (TF) cis-regulatory element (CRE) binary interaction higher order interaction multiple linear regression additive multiplicative synthetic genetic array (SGA) green fluorescent protein (GFP) ribonucleotide reductase (RNR) yeast X-box transcriptional regulation RNR3
22	Analysis of genetic variation in microrna-mediated regulation and the susceptibility to anxiety disorders Muiños Gimeno, Margarita 18 December 2009 (has links) We have investigated genetic variation in microRNA-mediated regulation as a susceptibility factor for anxiety disorders following two different approaches. We first studied two isoforms of the candidate gene NTRK3 by re-sequencing its different 3'UTRs in patients with Panic (PD) and Obsessive Compulsive disorders (OCD) as well as controls. Two rare variants that altered microRNA-mediated regulation were identified in PD. Conversely, association of a common SNP with OCD hoarding subtype was found. Moreover, we have also studied a possible involvement of microRNAs in anxiety disorders. Consequently, we have analysed the genomic organisation and genetic variation of miRNA-containing regions to construct a panel of SNPs for association analysis. Case-control studies revealed several associations. However, it is worth remarking the associations of miR-22 and miR-488 with PD; two microRNAs for which functional assays and transcriptome analysis after microRNA overexpression showed significant repression of a subset of genes involved in physiological pathways linked to PD development. / Hem investigat la variació genètica a la regulació mediada per microRNAs com a factors de susceptibilitat pels trastorns d'ansietat seguint dues aproximacions diferents. Primer vam estudiar dues isoformes del gen candidat NTRK3 mitjançant la reseqüenciació dels seus diferents 3'UTRs a pacients de pànic (TP), a pacients amb trastorn obsessiu compulsiu (TOC) i a controls. Dues variants rares que alteren la regulació mediada per microRNAs foren identificades per TP. D'altra banda, es trobà associació d'un SNP comú amb el subtipus acumulador de TOC. A més, també hem estudiat la possible implicació dels microRNAs als trastorns d'ansietat. Conseqüentment, hem analitzat l'organització genòmica i la variació genètica a regions que contenen microRNAs per construir un panell d'SNPs per fer anàlisis d'associació. Els estudis cas-control van revelar algunes associacions. Tanmateix, val la pena destacar les associacions del miR-22 i el miR-488 amb TP; dos microRNAs pels quals assajos funcionals i anàlisis de transcriptoma després de la seva sobreexpressió han mostrat una repressió significativa d'un grup de gens implicats en vies fisiològiques lligades al desenvolupament del TP. isoforma anàlisi de transcriptoma PCR assaig de luciferasa variant comuna variant rara reseqüenciar estudis d'associació poly-miRTS trastorn obsessiu-compulsiu trastorn de pànic trastorn d'ansietat variació genètica intraespecífica SNP NTRK3 gen candidat element regulador microRNA variació genòmica desordres poligènics trets complexes isoform transcriptome analysis PCR luciferase assay common variant rare variant re-sequencing association studies poly-miRTS obsessive-compulsive disorder panic disorder anxiety disorder genetic variation within species SNP NTRK3 candidate gene regulatory element microRNA genome variation polygenic disorders complex traits 57

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Functional Genetic Analysis Reveals Intricate Roles of Conserved X-box Elements in Yeast Transcriptional Regulation

Analysis of genetic variation in microrna-mediated regulation and the susceptibility to anxiety disorders