IIBBA   05544
INSTITUTO DE INVESTIGACIONES BIOQUIMICAS DE BUENOS AIRES
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Staufen 1 inhibits the stress-induced assembly of stress granules and P-bodies
Autor/es:
THOMAS MG; DESBATS MA; MARTINEZ TOSAR LJ; LEISHMAN CC; BOCCACCIO, GRACIELA L
Lugar:
IL CIOCCO, CASTELVECCHIO PASCOLl, ITALY,
Reunión:
Workshop; INTRACELLULAR RNA LOCAUZATION & LOCALIZED TRANSLATION; 2007
Institución organizadora:
EMBO WORKSHOP . PARTNERED WITH FASEB
Resumen:
Staufen 1 inhibits the stress-induced assembly of stress granules and P-bodies
Thomas MG (1,3), Desbats MA (1,2), Martinez Tosar LJ (1,2), Leishman CC (1),
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
MG (1,3), Desbats MA (1,2), Martinez Tosar LJ (1,2), Leishman CC (1),
Boccaccio GL (1,2,3)
(1) Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Instituto Leloir, Universidad de Buenos Aires, Argentina; (2) Facultad de Ciencias
Exactas y Natura/es, University of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
Buenos Aires, Argentina
of Buenos Aires, Argentina; (3) IIBBA-CON/CET,
Buenos Aires, Argentina
Stress Granules (SG) and Processing Bodies (PB) are cytoplasmic mRNA silencing
foci in dynamic equilibrium with translating polysomes. Whereas SG form transiently
during the integrated stress response, PB are constitutive and can be additionally
induced upon stress, being the two foci in close contacto Staufen 1 is a doublestranded
RNA binding protein associated to polysomes and present in RNA granules
involved in microfilament- and microtubule-dependent transport in insect and
mammalian cells. Using specific antibodies against mammalian Staufen 1 (Craig et al.,
Proteins 2005), we found that this molecule is recruited to both SG and PB upon
induction of endoplasmic reticulum or oxidative stress in mammalian cells (Thomas et
al., MBC 2005; Baez and Boccaccio JBC, 2005). However, we found that PB and SG
lacking Staufen 1 form in cells that had been depleted of this molecule, indicating that
Staufen 1 is not an essential component of these focl. Moreover, Staufen 1 depletion
facilitates SG formation upon oxidative or ER-stress induction. Conversely, transient
transfection of Staufen 1 impairs the growth of SG and PB upon stress.
Downregulation of foci formation by Staufen 1 does not involve inhibition of the stressinduced
phosphorylation of elF2a, a key event for SG assembly. We have mapped the
Staufen 1 inhibitory domain to the amino-terminal half of the molecule known to bind to
polysomes. In addition, we found that Staufen 1 associates to a subset of stressresistant
polysomes. By the other hand, the aggregation of perinuclear SG implies an
active mRNP transport and we found that microtubules and microfilaments are
required at distinct steps- during SG formation. Our results suggest that Staufen 1
modulates SG formation downstream of the stress signaling by: 1) preventing the
stress-induced polysome disassembly; 2) medianting an active, motor-dependent
transport of mRNPs out of the focl.