Molecular Characterization of the Cytoplasmic Interacting Protein of the Receptor Kinase IRK Expressed in the Inflorescence and Root Apices of Arabidopsis

Meristem maintenance and differentiation is regulated by intercellular communication through receptor-like kinases (RLKs) in plants, but the underlying molecular mechanisms of RLK signaling remain largely unknown. A cytoplasmic interactor for inflorescence and root apices receptor-like kinase (IRK),...

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Veröffentlicht in:Bioscience, biotechnology, and biochemistry biotechnology, and biochemistry, 2004-12, Vol.68 (12), p.2598-2606
Hauptverfasser: HATTAN, Junichiro, KANAMOTO, Hirosuke, TAKEMURA, Miho, YOKOTA, Akiho, KOHCHI, Takayuki
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container_issue 12
container_start_page 2598
container_title Bioscience, biotechnology, and biochemistry
container_volume 68
creator HATTAN, Junichiro
KANAMOTO, Hirosuke
TAKEMURA, Miho
YOKOTA, Akiho
KOHCHI, Takayuki
description Meristem maintenance and differentiation is regulated by intercellular communication through receptor-like kinases (RLKs) in plants, but the underlying molecular mechanisms of RLK signaling remain largely unknown. A cytoplasmic interactor for inflorescence and root apices receptor-like kinase (IRK), which is a typical meristematic RLK with leucine-rich repeats in Arabidopsis, was identified using a yeast two-hybrid assay and named IRK-interacting protein (IRKI). IRKI is a novel but highly conserved protein found in higher plants. The interaction between IRK and IRKI was confirmed by an in vitro pull-down assay and supported by their simultaneous expression in actively dividing cells in meristems. In the root tip, IRKI expression and localization visualized by green fluorescence protein (GFP) were observed in the quiescent center, initial cells, and immature stele cells. IRKI expression was expanded by exogenous auxin treatment and repressed by inhibitor treatment of polar auxin transport.
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A cytoplasmic interactor for inflorescence and root apices receptor-like kinase (IRK), which is a typical meristematic RLK with leucine-rich repeats in Arabidopsis, was identified using a yeast two-hybrid assay and named IRK-interacting protein (IRKI). IRKI is a novel but highly conserved protein found in higher plants. The interaction between IRK and IRKI was confirmed by an in vitro pull-down assay and supported by their simultaneous expression in actively dividing cells in meristems. In the root tip, IRKI expression and localization visualized by green fluorescence protein (GFP) were observed in the quiescent center, initial cells, and immature stele cells. 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subjects Amino Acid Sequence
Arabidopsis - cytology
Arabidopsis Proteins - analysis
Arabidopsis Proteins - genetics
Arabidopsis Proteins - metabolism
Arabidopsis thaliana
auxin
Biological and medical sciences
Carrier Proteins - genetics
Carrier Proteins - metabolism
Cell Proliferation
Fundamental and applied biological sciences. Psychology
Gene Expression Regulation, Plant - drug effects
Green Fluorescent Proteins
Indoleacetic Acids - pharmacology
initial cell
meristem
Meristem - chemistry
Meristem - cytology
Molecular Sequence Data
Plant Roots - chemistry
Protein Binding
Protein Kinases - genetics
Protein Kinases - metabolism
receptor-like kinase
Sequence Alignment
Signal Transduction
Transfection
Two-Hybrid System Techniques
title Molecular Characterization of the Cytoplasmic Interacting Protein of the Receptor Kinase IRK Expressed in the Inflorescence and Root Apices of Arabidopsis
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