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    FEBS Lett. 2010 Jan 4;584(1):39-43. doi: 10.1016/j.febslet.2009.11.033.

    Serine 62 is a phosphorylation site in folliculin, the Birt-Hogg-Dubé gene product.

    Source

    Department of Pathology and Oncology, Juntendo University School of Medicine, Tokyo, Japan.

    Abstract

    Recently, it was reported that the product of Birt-Hogg-Dubé syndrome gene (folliculin, FLCN) is directly phosphorylated by 5'-AMP-activated protein kinase (AMPK). In this study, we identified serine 62 (Ser62) as a phosphorylation site in FLCN and generated an anti-phospho-Ser62-FLCN antibody. Our analysis suggests that Ser62 phosphorylation is indirectly up-regulated by AMPK and that another residue is directly phosphorylated by AMPK. By binding with FLCN-interacting proteins (FNIP1 and FNIP2/FNIPL), Ser62 phosphorylation is increased. A phospho-mimic mutation at Ser62 enhanced the formation of the FLCN-AMPK complex. These results suggest that function(s) of FLCN-AMPK-FNIP complex is regulated by Ser62 phosphorylation.

    PMID:
    19914239
    [PubMed - indexed for MEDLINE]

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