Soybean Nodule Autoregulation Receptor Kinase Phosphorylates Two Kinase-associated Protein Phosphatases in Vitro

Miyahara, A., Hirani, T., Oakes, M., Kereszt, A., Kobe, B., Djordjevic, M.A. and Gresshoff, P. M. (2008) Soybean Nodule Autoregulation Receptor Kinase Phosphorylates Two Kinase-associated Protein Phosphatases in Vitro. Journal of Biological Chemistry, 283 37: 25381-25391. doi:10.1074/jbc.M800400200

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Author Miyahara, A.
Hirani, T.
Oakes, M.
Kereszt, A.
Kobe, B.
Djordjevic, M.A.
Gresshoff, P. M.
Title Soybean Nodule Autoregulation Receptor Kinase Phosphorylates Two Kinase-associated Protein Phosphatases in Vitro
Journal name Journal of Biological Chemistry   Check publisher's open access policy
ISSN 0021-9258
Publication date 2008-09-01
Sub-type Article (original research)
DOI 10.1074/jbc.M800400200
Open Access Status File (Publisher version)
Volume 283
Issue 37
Start page 25381
End page 25391
Total pages 11
Place of publication United States
Publisher American Society for Biochemistry and Molecular Biology, Inc
Language eng
Subject C1
820503 Grain Legumes
060702 Plant Cell and Molecular Biology
Abstract The NARK (nodule autoregulation receptor kinase) gene, a negative regulator of cell proliferation in nodule primordia in several legumes, encodes a receptor kinase that consists of an extracellular leucine-rich repeat and an intracellular serine/threonine protein kinase domain. The putative catalytic domain of NARK was expressed and purified as a maltose-binding or a glutathione S-transferase fusion protein in Escherichia coli. The recombinant NARK proteins showed autophosphorylation activity in vitro. Several regions of the NARK kinase domain were shown by mass spectrometry to possess phosphoresidues. The kinase-inactive protein K724E failed to autophosphorylate, as did three other proteins corresponding to phenotypically detected mutants defective in whole plant autoregulation of nodulation. A wild-type NARK fusion protein transphosphorylated a kinase-inactive mutant NARK fusion protein, suggesting that it is capable of intermolecular autophosphorylation in vitro. In addition, Ser-861 and Thr-963 in the NARK kinase catalytic domain were identified as phosphorylation sites through site-directed mutagenesis. The genes coding for the kinase-associated protein phosphatases KAPP1 and KAPP2, two putative interacting components of NARK, were isolated. NARK kinase domain phosphorylated recombinant KAPP proteins in vitro. Autophosphorylated NARK kinase domain was, in turn, dephosphorylated by both KAPP1 and KAPP2. Our results suggest a model for signal transduction involving NARK in the control of nodule development.
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2009 Higher Education Research Data Collection
School of Biological Sciences Publications
 
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Created: Tue, 10 Feb 2009, 22:47:10 EST by Gail Walter on behalf of School of Biological Sciences