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PKA Phosphorylation of NDE1 Is DISC1/PDE4 Dependent and Modulates Its Interaction with LIS1 and NDEL1

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    Rights statement: Copyright © 2011 the authors 0270-6474/11/319043-12$15.00/0 This article is freely available online through the J Neurosci Open Choice option.

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http://www.jneurosci.org/content/31/24/9043
Original languageEnglish
Pages (from-to)9043-9054
Number of pages12
JournalJournal of Neuroscience
Volume31
Issue number24
DOIs
Publication statusPublished - Jun 2011

Abstract

Nuclear distribution factor E-homolog 1 (NDE1), Lissencephaly 1 (LIS1), and NDE-like 1 (NDEL1) together participate in essential neurodevelopmental processes, including neuronal precursor proliferation and differentiation, neuronal migration, and neurite outgrowth. NDE1/LIS1/NDEL1 interacts with Disrupted in Schizophrenia 1 (DISC1) and the cAMP-hydrolyzing enzyme phosphodiesterase 4 (PDE4). DISC1, PDE4, NDE1, and NDEL1 have each been implicated as genetic risk factors for major mental illness. Here, we demonstrate that DISC1 and PDE4 modulate NDE1 phosphorylation by cAMP-dependent protein kinase A (PKA) and identify a novel PKA substrate site on NDE1 at threonine-131 (T131). Homology modeling predicts that phosphorylation at T131 modulates NDE1-LIS1 and NDE1-NDEL1 interactions, which we confirm experimentally. DISC1-PDE4 interaction thus modulates organization of the NDE1/NDEL1/LIS1 complex. T131-phosphorylated NDE1 is present at the postsynaptic density, in proximal axons, within the nucleus, and at the centrosome where it becomes substantially enriched during mitosis. Mutation of the NDE1 T131 site to mimic PKA phosphorylation inhibits neurite outgrowth. Thus PKA-dependent phosphorylation of the NDE1/LIS1/NDEL1 complex is DISC1-PDE4 modulated and likely to regulate its neural functions.

    Research areas

  • 1-Alkyl-2-acetylglycerophosphocholine Esterase, Animals, Carrier Proteins, Cell Line, Cercopithecus aethiops, Cyclic AMP-Dependent Protein Kinases, Humans, Immunoprecipitation, Microtubule-Associated Proteins, Models, Molecular, Mutation, Nerve Tissue Proteins, Neurites, Phosphorylation, Post-Synaptic Density, Threonine, Transfection

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