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Doctoral Thesis
DOI
https://doi.org/10.11606/T.42.2017.tde-17082016-085352
Document
Author
Full name
Juliana da Silva Santos
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2016
Supervisor
Committee
Marques, Marilis do Valle (President)
Baldini, Regina Lúcia
Galhardo, Rodrigo da Silva
Gueiros Filho, Frederico José
Marval, Marcia Giambiagi de
Title in Portuguese
Caracterização dos mecanismos de ação da proteína CspC na manutenção da viabilidade e na resposta de Caulobacter crescentus a estresses.
Keywords in Portuguese
Caulobacter crescentus
Biologia molecular
Microbiologia
Proteínas de choque frio
Regulação gênica
Resposta estresse em bactérias
Abstract in Portuguese
As mutações pontuais nos dois domínios de CspC proporcionam fenótipos mais severos que a falta de cspC. Nenhuma CSP de C. crescentus é capaz de complementar o fenótipo de sensibilidade ao frio de E. coli BX04. Entretanto, os domínios de choque frio de CspC de C. crescentus individualmente são capazes de complementar este fenótipo. Uma análise transcricional global mostrou que a ausência de cspC afeta a transcrição de 11 genes na fase exponencial e 60 genes na fase estacionária. A meia vida dos genes sciP, aceA e CC0682 se mostrou menor no mutante cspC, sugerindo que é possível que CspC desempenhe uma regulação pós-transcricional.
Title in English
Characterization of the mechanisms of CspC action in Caulobacter crescentus cell viability and stress response.
Keywords in English
Caulobacter crescentus
Bacterial stress response
Cold shock proteins
Gene regulation
Microbiology
Molecular biology
Abstract in English
Point mutations in the CspC CSDs caused a more severe phenotype than that of the null strain. None of the C. crescentus CSPs complemented the cold sensitivity of E. coli BX04 mutant. However, the individual CSDs of C. crescentus CspC complemented this phenotype. A microarray global transcriptional profiling showed the absence of cspC affected the transcription of 11 genes at exponential phase and 60 genes at stationary phase. mRNA decay experiments showed that the sciP, aceA e CC0682 mRNAs were less stable in the cspC mutant, indicating that its effect could be at least partially due to posttranscriptional regulation.
 
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Publishing Date
2017-05-25
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • SANTOS, J. S., and MARQUES, MV. Characterization of the mechanisms of CspC action in Caulobacter crescentus cell viability and stress response. In 58o Congresso Brasileiro de Genética, Foz do Iguaçu, 2012. Resumos do 58o Congresso Brasileiro de Genética., 2012. Abstract.
  • SANTOS, J. S., e Marques, Marilis V. CARACTERIZAÇÃO DOS MECANISMOS DE AÇÃO DA PROTEÍNA CSPC NA MANUTENÇÃO DA VIABILIDADE E NA RESPOSTA DE CAULOBACTER CRESCENTUS A ESTRESSES. In 27o Congresso Brasileiro de Microbiologia, Natal, 2013. Anais do 27o Congresso Brasileiro de Microbiologia., 2013. Resumo.
  • SANTOS, J. S., e MARQUES, MV. Determinação dos fatores de transcrição e sinais celulares envolvidos na regulação do gene cspC em Caulobacter crescentus. In 26º Congresso Brasileiro de Microbiologia, Foz do Iguaçu, 2011. Resumos do 26º Congresso Brasileiro de Microbiologia., 2011. Resumo.
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