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Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses

Advances in proteomic techniques have allowed the large-scale identification of phosphorylation sites in complex protein samples, but new biological insight requires an understanding of their in vivo dynamics. Here, we demonstrate the use of a stable isotope-based quantitative approach for pathway d...

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Detalles Bibliográficos
Autores principales: Nühse, Thomas S, Bottrill, Andrew R, Jones, Alexandra ME, Peck, Scott C
Formato: Texto
Lenguaje:English
Publicado: Blackwell Publishing Ltd 2007
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2156193/
https://www.ncbi.nlm.nih.gov/pubmed/17651370
http://dx.doi.org/10.1111/j.1365-313X.2007.03192.x
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author Nühse, Thomas S
Bottrill, Andrew R
Jones, Alexandra ME
Peck, Scott C
author_facet Nühse, Thomas S
Bottrill, Andrew R
Jones, Alexandra ME
Peck, Scott C
author_sort Nühse, Thomas S
collection PubMed
description Advances in proteomic techniques have allowed the large-scale identification of phosphorylation sites in complex protein samples, but new biological insight requires an understanding of their in vivo dynamics. Here, we demonstrate the use of a stable isotope-based quantitative approach for pathway discovery and structure–function studies in Arabidopsis cells treated with the bacterial elicitor flagellin. The quantitative comparison identifies individual sites on plasma membrane (PM) proteins that undergo rapid phosphorylation or dephosphorylation. The data reveal both divergent dynamics of different sites within one protein and coordinated regulation of homologous sites in related proteins, as found for the PM H(+)-ATPases AHA1, 2 and 3. Strongly elicitor-responsive phosphorylation sites may reflect direct regulation of protein activity. We confirm this prediction for RbohD, an NADPH oxidase that mediates the rapid production of reactive oxygen species (ROS) in response to elicitors and pathogens. Plant NADPH oxidases are structurally distinct from their mammalian homologues, and regulation of the plant enzymes is poorly understood. On RbohD, we found both unchanging and strongly induced phosphorylation sites. By complementing an RbohD mutant plant with non-phosphorylatable forms of RbohD, we show that only those sites that undergo differential regulation are required for activation of the protein. These experiments demonstrate the potential for use of quantitative phosphoproteomics to determine regulatory mechanisms at the molecular level and provide new insights into innate immune responses.
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spelling pubmed-21561932008-01-03 Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses Nühse, Thomas S Bottrill, Andrew R Jones, Alexandra ME Peck, Scott C Plant J Technical Advance Advances in proteomic techniques have allowed the large-scale identification of phosphorylation sites in complex protein samples, but new biological insight requires an understanding of their in vivo dynamics. Here, we demonstrate the use of a stable isotope-based quantitative approach for pathway discovery and structure–function studies in Arabidopsis cells treated with the bacterial elicitor flagellin. The quantitative comparison identifies individual sites on plasma membrane (PM) proteins that undergo rapid phosphorylation or dephosphorylation. The data reveal both divergent dynamics of different sites within one protein and coordinated regulation of homologous sites in related proteins, as found for the PM H(+)-ATPases AHA1, 2 and 3. Strongly elicitor-responsive phosphorylation sites may reflect direct regulation of protein activity. We confirm this prediction for RbohD, an NADPH oxidase that mediates the rapid production of reactive oxygen species (ROS) in response to elicitors and pathogens. Plant NADPH oxidases are structurally distinct from their mammalian homologues, and regulation of the plant enzymes is poorly understood. On RbohD, we found both unchanging and strongly induced phosphorylation sites. By complementing an RbohD mutant plant with non-phosphorylatable forms of RbohD, we show that only those sites that undergo differential regulation are required for activation of the protein. These experiments demonstrate the potential for use of quantitative phosphoproteomics to determine regulatory mechanisms at the molecular level and provide new insights into innate immune responses. Blackwell Publishing Ltd 2007-09 /pmc/articles/PMC2156193/ /pubmed/17651370 http://dx.doi.org/10.1111/j.1365-313X.2007.03192.x Text en © 2007 The Authors Journal compilation © 2007 Blackwell Publishing Ltd
spellingShingle Technical Advance
Nühse, Thomas S
Bottrill, Andrew R
Jones, Alexandra ME
Peck, Scott C
Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title_full Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title_fullStr Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title_full_unstemmed Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title_short Quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
title_sort quantitative phosphoproteomic analysis of plasma membrane proteins reveals regulatory mechanisms of plant innate immune responses
topic Technical Advance
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2156193/
https://www.ncbi.nlm.nih.gov/pubmed/17651370
http://dx.doi.org/10.1111/j.1365-313X.2007.03192.x
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