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Characterization of the role of cytosolic proteins in the localization of organellar proteins in Arabidopsis thaliana.

Grant number: 11/13185-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): October 01, 2011
Effective date (End): March 08, 2016
Field of knowledge:Biological Sciences - Genetics - Plant Genetics
Principal researcher:Márcio de Castro Silva Filho
Grantee:Larissa Spoladore
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated scholarship(s):13/24078-9 - Identification of unknown cytosolic factors involved in the targeting of organellar proteins in plants, BE.EP.DR


Most organellar proteins are coded by the nucleus, synthesized in the cytosol and targeted specifically to subcellular compartments. Targeting to the many compartments operates with a complex machinery that relies on targeting sequences, cytosolic proteins and specific organellar receptors. Many studies have been done in attempt to characterize the steps involved in the localization of proteins, from the initial stages followed by its synthesis to the factors regulating its targeting. Cytosolic proteins that interact with dual-targeted proteins, verified with protein-protein interaction networks, will be used in studies of their role in the localization of organellar proteins in A. thaliana. This study will be performed by confirmation of these interactions in planta, using BiFC, and in vitro, with GST-pulldown; analysis of a possible co-regulation of gene expression between cytosolic proteins and their interactors; and analysis of gene silencing to verify the consequence of the absence of these cytosolic proteins to the correct localization of interacting proteins. These data may lead to the identification of proteins that are involved in the regulation of subcellular targeting of organellar proteins, such as dual-targeted proteins.

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Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
SPOLADORE, Larissa. Genetic components affecting organelar protein targeting in Arabidopsis thaliana. 2016. Doctoral Thesis - Universidade de São Paulo (USP). Escola Superior de Agricultura Luiz de Queiroz (ESALA/BC) Piracicaba.

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