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

Cloning and characterization of DYRK1B, a novel member of the DYRK family of protein kinases.

The DYRK1A gene on human chromosome 21 encodes a protein kinase presumed to be involved in the pathogenesis of mental retardation in Down's syndrome. Here we describe a highly similar homolog, DYRK1B, which is, in contrast to DYRK1A, predominately expressed in muscle and testis. The human DYRK1B gene was mapped to chromosome 19 (19q12-13.11) by radiation hybrid analysis. The amino acid sequences of DYRK1A and DYRK1B are 84% identical in the N-terminus and the catalytic domain but show no extended sequence similarity in the C-terminal region. DYRK1B contains all motifs characteristic for the DYRK family of protein kinases. In addition, the sequence comprises a bipartite nuclear localization motif. A green fluorescent protein (GFP) fusion protein of DYRK1B was found mainly in the nucleus of transfected COS-7 cells. These data suggest that DYRK1B is a muscle- and testis-specific isoform of DYRK1A and is involved in the regulation of nuclear functions.[1]


  1. Cloning and characterization of DYRK1B, a novel member of the DYRK family of protein kinases. Leder, S., Weber, Y., Altafaj, X., Estivill, X., Joost, H.G., Becker, W. Biochem. Biophys. Res. Commun. (1999) [Pubmed]
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