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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Fibroblast growth factor-2 interacts with free ribosomal protein S19.

Exogenous FGF-2 added to cells is internalized and part of it translocates to the nucleus of the cells. To get a better understanding of the FGF-2-induced signaling pathway, we looked for proteins associated with FGF-2 in the cytoplasm of the target cells. We first used the GST-FGF-2 to isolate cytoplasmic proteins complexes containing FGF-2 from S100 extract (supernatant 100,000g). Among the retrieved proteins, we focused our studies on RPS19, a protein of the 40S small ribosomal subunit. We showed that FGF-2 interacts directly with RPS19 in vitro. Second, we coimmunoprecipitated RPS19 and FGF-2 from a S240 extract (240,000g supernatant) prepared from FGF-2-stimulated cells and devoid of 40S ribosomal subunit. The result of these experiments suggest that a pool of free RPS19 exists in cells and that FGF-2 interacts in vivo with free RPS19.[1]


  1. Fibroblast growth factor-2 interacts with free ribosomal protein S19. Soulet, F., Al Saati, T., Roga, S., Amalric, F., Bouche, G. Biochem. Biophys. Res. Commun. (2001) [Pubmed]
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