INVESTIGADORES
ROSSI Silvia Graciela
congresos y reuniones científicas
Título:
IDENTIFICATION OF YEAST PKA SUBUNITS TRANSCRIPTION REGULATORS USING TWO-COLOR CELL ARRAY SCREENING
Autor/es:
PAUTASSO, C; CAÑONERO, L; ZAREMBERG, V; ROSSI, S
Lugar:
Mendoza
Reunión:
Congreso; XLVIII Reunión Anual de la Sociedad Argentina de Bioquímica y Biología Molecular (SAIB); 2012
Institución organizadora:
SAIB
Resumen:
Transcriptional regulation is a key mechanism that controls the fate
and response of cells to diverse signals. Therefore the identification
of regulators which mediate these signals is a crucial step in
elucidating how cell fate is regulated. We present here a detailed
analysis of TPKs and BCY1 genes regulation based on the use of a
dual reporter screen to discover regulators. In
, three genes encode the PKA catalytic subunit, TPK1,
TPK2, TPK3, while the regulatory subunit is encoded by only one
gene, BCY1. Using a two-color GFP-RFP reporter system,
Reporter-Synthetic Genetic Array, we systematically assesses the
effects of gene deletions on the TPK1, TPK2, TPK3 and BCY1
promoters activity. We could define a list of positive and negative
transcription regulators that were classified using Gene Ontology
analysis into functionally related groups.We identified genes with
roles in lipid and phosphate metabolism, cytoskeleton organization
and transcription regulation. Genetic networks were constructed
showing that several regulators are shared by the PKA subunits.
The involvement of some of these pathways in TPKs and BCY1
transcription regulation was validated. Thus, the reporter gene
assay provides a powerful means to link gene function to
transcriptional control.