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      Selective Enrichment Coupled with Proteomics to Identify S-Acylated Plasma Membrane Proteins in Arabidopsis.

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          Abstract

          Protein S-acylation, predominately in the form of palmitoylation, is a reversible lipid post-translational modification on cysteines that plays important roles in protein localization, trafficking, activity, and complex assembly. The functions and regulatory mechanisms of S-acylation have been extensively studied in mammals owing to remarkable development of high-resolution proteomics and the discovery of the S-acylation-related enzymes. However, the advancement of S-acylation studies in plants lags behind that in mammals, mainly due to the lack of knowledge about proteins responsible for this process, such as protein acyltransferases and their substrates. In this article, a set of systematic protocols to study global S-acylation in Arabidopsis seedlings is described. The procedures are presented in detail, including preparation of Arabidopsis seedlings, enrichment of plasma membrane (PM) proteins, ensuing enrichment of S-acylated proteins/peptides based on the acyl-biotin exchange method, and large-scale identification of S-acylated proteins/peptides via mass spectrometry. This approach enables researchers to study S-acylation of PM proteins in plants in a systematic and straightforward way. © 2020 Wiley Periodicals LLC. Basic Protocol 1: Preparation of Arabidopsis seedling materials Basic Protocol 2: Isolation and enrichment of plasma membrane proteins Support Protocol 1: Determination of protein concentration using BCA assay Basic Protocol 3: Enrichment of S-acylated proteins by acyl-biotin exchange method Support Protocol 2: Protein precipitation by methanol/chloroform method Basic Protocol 4: Trypsin digestion and proteomic analysis Alternate Protocol: Pre-resin digestion and peptide-level enrichment.

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          Author and article information

          Journal
          Curr Protoc Plant Biol
          Current protocols in plant biology
          Wiley
          2379-8068
          2379-8068
          December 2020
          : 5
          : 4
          Affiliations
          [1 ] Division of Plant Sciences, C.S. Bond Life Science Center, University of Missouri, Columbia, Missouri.
          [2 ] Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington.
          [3 ] Biological Science Division, Pacific Northwest National Laboratory, Richland, Washington.
          [4 ] Division of Biochemistry, C.S. Bond Life Science Center, University of Missouri, Columbia, Missouri.
          Article
          NIHMS1623562
          10.1002/cppb.20119
          9206763
          32976704
          ce5a8d04-786b-4e9a-a437-8fd7e2abc376
          © 2020 Wiley Periodicals LLC.
          History

          S-acylation,acyl-biotin exchange (ABE),palmitoylation,plasma membrane proteins,proteomics

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