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    Free Radic Biol Med. 2009 Mar 15;46(6):821-7. Epub 2008 Dec 24.

    Superoxide dismutase is regulated by LAMMER kinase in Drosophila and human cells.

    James BP, Staatz WD, Wilkinson ST, Meuillet E, Powis G.

    Source

    Department of Experimental Therapeutics, M.D. Anderson Cancer Center, 1400 Holcombe Blvd., Y6.6032, Unit 36, Houston, TX 77030, USA. bpjames@mdanderson.org

    Abstract

    LAMMER kinases (also known as CDC-2-like or CLKs) are a family of dual specificity serine/threonine protein kinases that are found in all sequenced eukaryotic genomes. In the fission yeast, Schizosaccharomyces pombe, the LAMMER kinase gene, Lkh1, positively regulates the expression of the antioxidant defense genes, superoxide dismutase 1 (sod1+, CuZn-SOD) and catalase (ctt1+, CAT). We have shown that mutations in the Drosophila LAMMER kinase gene, Darkener of apricot (Doa), protect against the decrease in life span caused by the reactive oxygen species (ROS) generator paraquat, and at the same time show an increase in cytoplasmic (CuZn-Sod or SOD1) and mitochondrial superoxide dismutase (Mn-Sod or SOD2) protein levels and activity. The siRNA-mediated knock down of the human LAMMER kinase gene, CLK-1, in HeLa and MCF-7 human cell lines leads to an increase in both SOD1 activity and mRNA transcript levels. These data suggest that SOD1 is negatively regulated by LAMMER kinases in Drosophila and human cell lines and that this regulation may be conserved during evolution.

    PMID:
    19135146
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2699669
    Free PMC Article

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