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Master's Dissertation
DOI
https://doi.org/10.11606/D.87.2017.tde-23012017-141051
Document
Author
Full name
Bruno Spinetti Moda
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Barros, Mário Henrique de (President)
Marques, Marilis do Valle
Pascon, Renata Castiglioni
Title in Portuguese
Estudos do gene nuclear MSC6 envolvido na tradução mitocondrial em Saccharomyces cerevisiae
Keywords in Portuguese
Saccharomyces cerevisiae
Mitocôndria
Respiração celular
Tradução mitocondrial
Abstract in Portuguese
A mitocôndria é um componente essencial para a célula eucariótica, sendo que mutações que comprometam seu funcionamento podem causar as doenças mitocondriais. Estudos a respeito da biogênese mitocondrial para compreender seu funcionamento são importantes para que seja possível elaborar novas formas de tratamento. Saccharomyces cerevisiae é considerada o melhor modelo de estudo de biogênese mitocondrial. Neste trabalho, estudamos o gene nuclear MSC6, de S. cerevisiae, que foi capaz de suprimir a mutação dominante produzida no gene HER2/QRS1, um gene essencial no processo de tradução mitocondrial. A proteína codificada por MSC6 não tinha função conhecida. Verificamos sua presença na matriz mitocondrial, e que a sua ausência prejudica o processo respiratório. Também verificamos uma possível interação de Msc6p com Fmt1p, uma enzima envolvida no início do processo de tradução mitocondrial. Ficou clara a participação de Msc6p no processo traducional mitocondrial, mas novos estudos serão necessários para determinar sua função específica.
Title in English
Studies of MSC6 nuclear gene related with mitochondrial translation in Saccharomyces cerevisiae.
Keywords in English
Saccharomyces cerevisiae
Cellular respiration
Mitochondria
Mitochondrial translation
Abstract in English
Mitochondria is necessary in many cellular processes, therefore, compromised mutations of its operation can cause severe damage to the cell, known as mitochondrial disorders. Thus is necessary the realization of mitochondrial biogenesis studies in order to fully understand its functioning in health and disease. Mitochondria biogenesis studies are favored in Saccharomyces cerevisiae. In this work, we have studied the MSC6 nuclear gene of S. cerevisiae that was able to suppress the HER2/QRS1 dominant mutant, another essential gene for the mitochondrial translation process. Msc6p has a PPR protein motif likely associated to RNA binding but with unknown function. We discovered that Msc6p is localized in the mitochondrial matrix, also that disruption of MSC6 implies in respiratory. We also find a possible interaction between Msc6p and Fmt1p, an enzyme required for mitochondrial translation initiation. In conclusion, is clear the role of MSC6 in the mitochondrial translational process, but further studies are required to indicate the specific function of Msc6p.
 
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Publishing Date
2017-01-23
 
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