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      Post-translational modifications of plant cell wall proteins and peptides: A survey from a proteomics point of view.

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          Abstract

          Plant cell wall proteins (CWPs) and peptides are important players in cell walls contributing to their assembly and their remodeling during development and in response to environmental constraints. Since the rise of proteomics technologies at the beginning of the 2000's, the knowledge of CWPs has greatly increased leading to the discovery of new CWP families and to the description of the cell wall proteomes of different organs of many plants. Conversely, cell wall peptidomics data are still lacking. In addition to the identification of CWPs and peptides by mass spectrometry (MS) and bioinformatics, proteomics has allowed to describe their post-translational modifications (PTMs). At present, the best known PTMs consist in proteolytic cleavage, N-glycosylation, hydroxylation of P residues into hydroxyproline residues (O), O-glycosylation and glypiation. In this review, the methods allowing the capture of the modified proteins based on the specific properties of their PTMs as well as the MS technologies used for their characterization are briefly described. A focus is done on proteolytic cleavage leading to protein maturation or release of signaling peptides and on O-glycosylation. Some new technologies, like top-down proteomics and terminomics, are described. They aim at a finer description of proteoforms resulting from PTMs or degradation mechanisms. This article is part of a Special Issue entitled: Plant Proteomics--a bridge between fundamental processes and crop production, edited by Dr. Hans-Peter Mock.

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          Author and article information

          Journal
          Biochim. Biophys. Acta
          Biochimica et biophysica acta
          Elsevier BV
          0006-3002
          0006-3002
          Aug 2016
          : 1864
          : 8
          Affiliations
          [1 ] Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326 Castanet Tolosan, France.
          [2 ] Université de Toulouse, CNRS, UPS, 24 chemin de Borde Rouge, Auzeville, BP42617, 31326 Castanet Tolosan, France. Electronic address: jamet@lrsv.ups-tlse.fr.
          Article
          S1570-9639(16)30035-8
          10.1016/j.bbapap.2016.02.022
          26945515
          b8cae546-d877-47bf-87d3-8338ffb66928

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