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First published online 21 April 2009
doi: 10.1242/jcs.044354

Journal of Cell Science 122, 1574-1583 (2009)
Published by The Company of Biologists 2009
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Research Article

Attenuation of Notch signalling by the Down-syndrome-associated kinase DYRK1A

Javier Fernandez-Martinez*, Eva M. Vela, Mireille Tora-Ponsioen, Oscar H. Ocaña, M. Angela Nieto and Juan Galceran{ddagger}

Instituto de Neurociencias, CSIC-UMH, Sant Joan d'Alacant, Alicante, Spain

{ddagger} Author for correspondence (e-mail: j.galceran{at}umh.es)

Accepted 5 February 2009

Notch signalling is used throughout the animal kingdom to spatially and temporally regulate cell fate, proliferation and differentiation. Its importance is reflected in the dramatic effects produced on both development and health by small variations in the strength of the Notch signal. The Down-syndrome-associated kinase DYRK1A is coexpressed with Notch in various tissues during embryonic development. Here we show that DYRK1A moves to the nuclear transcription compartment where it interacts with the intracellular domain of Notch promoting its phosphorylation in the ankyrin domain and reducing its capacity to sustain transcription. DYRK1A attenuates Notch signalling in neural cells both in culture and in vivo, constituting a novel mechanism capable of modulating different developmental processes that can also contribute to the alterations observed during brain development in animal models of Down syndrome.

Key words: Development, DYRK1A, Notch, Phosphorylation, Down syndrome


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J. Fernandez-Martinez, E. M. Vela, M. Tora-Ponsioen, O. H. Ocana, M. A. Nieto, and J. Galceran
Attenuation of Notch signalling by the Down-syndrome-associated kinase DYRK1A
Development, June 1, 2009; 136(11): e1 - e1.
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