Identification of the versatile scaffold protein RACK1 on the eukaryotic ribosome by cryo-EMSengupta, J., Nilsson, J., Gursky, R., Spahn, C.M., Nissen, P., Frank, J.
(2004) Nat Struct Mol Biol 11: 957-962
- PubMed: 15334071
- DOI: 10.1038/nsmb822
- Structures With Same Primary Citation
- PubMed Abstract:
- Release of eIF6 (p27BBP) from the 60S subunit allows 80S ribosome assembly
Ceci, M., Gaviraghi, C., Gorrini, C., Sala, L.A., Offenhauser, N., Marchisio, P.C., Biffo, S.
(2003) Nature 426: 579
- Cpc2/RACK1 is a ribosome-associated protein that promotes efficient translation in Schizosaccharomyces pombe
Shor, B., Calaycay, J., Rushbrook, J., McLeod, M.
(2003) J Biol Chem 278: 49119
- Asc1p, a WD40-domain containing adaptor protein, is required
for the interaction of the RNA-binding protein Scp160p with
Baum, S., Bittins, M., Frey, S., Seedorf, M.
(2004) Biochem J 380: 823
RACK1 serves as a scaffold protein for a wide range of kinases and membrane-bound receptors. It is a WD-repeat family protein and is predicted to have a beta-propeller architecture with seven blades like a Gbeta protein. Mass spectrometry studies hav ...
RACK1 serves as a scaffold protein for a wide range of kinases and membrane-bound receptors. It is a WD-repeat family protein and is predicted to have a beta-propeller architecture with seven blades like a Gbeta protein. Mass spectrometry studies have identified its association with the small subunit of eukaryotic ribosomes and, most recently, it has been shown to regulate initiation by recruiting protein kinase C to the 40S subunit. Here we present the results of a cryo-EM study of the 80S ribosome that positively locate RACK1 on the head region of the 40S subunit, in the immediate vicinity of the mRNA exit channel. One face of RACK1 exposes the WD-repeats as a platform for interactions with kinases and receptors. Using this platform, RACK1 can recruit other proteins to the ribosome.
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