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    Mol Cell. 2001 Feb;7(2):401-9.

    NF-kappaB-inducing kinase regulates the processing of NF-kappaB2 p100.

    Source

    Department of Microbiology and Immunology, Pennsylvania State University College of Medicine, Hershey, PA 17033, USA.

    Abstract

    Processing of the nf(kappa)b2 gene product p100 to generate p52 is an important step in NF-kappaB regulation. We show that this step is negatively regulated by a processing-inhibitory domain (PID) within p100 and positively regulated by the NF-kappaB-inducing kinase (NIK). While the PID suppresses the constitutive processing of p100, NIK induces p100 processing by stimulating site-specific phosphorylation and ubiquitination of this precursor protein. Further, a natural mutation of the gene encoding NIK in alymphoplasia (aly) mice cripples the function of NIK in p100 processing, causing a severe defect in p52 production. These data suggest that NIK is a specific kinase regulating p100 processing and explain why the aly and nf(kappa)b2 knockout mice exhibit similar immune deficiencies.

    PMID:
    11239468
    [PubMed - indexed for MEDLINE]

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