INVESTIGADORES
DUARTE Alejandra Beatriz
congresos y reuniones científicas
Título:
Mitochondrial and nuclear kinase complex role of MAPKs and MKPs in the cyclic AMPc mediated response
Autor/es:
PODEROSO CECILIA; DUARTE ALEJANDRA; BRION LAURA; GOMEZ NATALIA; MORI SEQUEIROS GARCÍA M MERCEDES; PODESTÁ ERNESTO J; PAZ CRISTINA
Lugar:
San Miguel de Tucumán, Tucumán, Argentina
Reunión:
Congreso; XLV Annual Meeting of Argentine Society for Biochemistry and Molecular Biology (SAIB); 2009
Institución organizadora:
Argentine Society for Biochemistry and Molecular Biology (SAIB)
Resumen:
Protein phosphorylation mediated by the concerted action of
kinases and phosphatases regulates key biological events such as
cell growth, differentiation and apoptosis. The simultaneous
stimulation of different signal pathways to produce several cellular
responses involves a finite number of kinases and phosphatases.
Thus, the spatial and temporal control of these enzymes is crucial for
the selectivity and effectiveness of phospho/dephosphorylation
events. The regulation of MAP kinases (MAPKs) and MAP kinase
phosphatases (MKPs), which provide a negative feedback
mechanism for MAPK activity, explains how this control is
achieved. Phosphorylation induced by a specific stimulus promotes
conformational changes, creates docking sites and causes
intracellular relocation of proteins that finally results in the
activation of a particular set of MAPKs in a specific compartment.
The same stimulus also induces MKPs of different induction
kinetics and subcellular localization. Thus, these coordinated events
and the existence of a complex containing a specific substrate with
kinases, phosphatases, docking and scaffolding proteins leads to the
compartment-specific regulation of MAPKs to produce the right
response in the right place. Here, the participation of nuclear and
mitochondrial kinases and phosphatases complex in the induction
and activation of key steroigenic proteins will be presented.