title: Working hard at the nexus between cell signaling and the ribosomal machinery: An insight into the roles of RACK1 in translational regulation.
abstract: RACK1 is a ribosome-associated protein which functions as a receptor for activated PKCs. It also acts as a scaffold for many other proteins involved in diverse signaling pathways, e.g. Src, JNK, PDE4D and FAK signaling. With such a broad interactome, RACK1 has been suggested to function as a linker between cell signaling and the translation machinery. Accordingly, RACK1 modulates translation at different levels in several model organisms. For instance, it regulates ribosome stalling and mRNA quality control in yeasts and promotes translation efficiency downstream of specific cellular stimuli in mammals. However, the molecular mechanism by which RACK1 exerts these roles is widely uncharacterized. Moreover, the full list of ribosome-recruited RACK1 interactors still needs characterization. Here we discuss in vivo and in vitro findings to better delineate the roles of RACK1 in regulating ribosome function and translation.
authors.affiliation: Molecular Histology and Cell Growth Unit; National Institute of Molecular Genetics - INGM "Romeo and Enrica Invernizzi" ; Milan, Italy.
authors.forename: Simone
authors.initials: S
authors.lastname: Gallo
authors.affiliation: Molecular Histology and Cell Growth Unit; National Institute of Molecular Genetics - INGM "Romeo and Enrica Invernizzi" ; Milan, Italy.
authors.forename: Nicola
authors.initials: N
authors.lastname: Manfrini
keywords: Asc1; Cpc2; PKC; RACK1; eIF6; mouse; ribosome; translation; yeast
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