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

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Co-receptor requirements for fibroblast growth factor-19 signaling.

FGF19 is a unique member of the fibroblast growth factor (FGF) family of secreted proteins that regulates bile acid homeostasis and metabolic state in an endocrine fashion. Here we investigate the cell surface receptors required for signaling by FGF19. We show that betaKlotho, a single-pass transmembrane protein highly expressed in liver and fat, induced ERK1/2 phosphorylation in response to FGF19 treatment and significantly increased the interactions between FGF19 and FGFR4. Interestingly, our results show that alphaKlotho, another Klotho family protein related to betaKlotho, also induced ERK1/2 phosphorylation in response to FGF19 treatment and increased FGF19-FGFR4 interactions in vitro, similar to the effects of betaKlotho. In addition, heparin further enhanced the effects of both alphaKlotho and betaKlotho in FGF19 signaling and interaction experiments. These results suggest that a functional FGF19 receptor may consist of FGF receptor (FGFR) and heparan sulfate complexed with either alphaKlotho or betaKlotho.[1]

References

  1. Co-receptor requirements for fibroblast growth factor-19 signaling. Wu, X., Ge, H., Gupte, J., Weiszmann, J., Shimamoto, G., Stevens, J., Hawkins, N., Lemon, B., Shen, W., Xu, J., Veniant, M.M., Li, Y.S., Lindberg, R., Chen, J.L., Tian, H., Li, Y. J. Biol. Chem. (2007) [Pubmed]
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