Plant Science


    Protocols in Current Issue
    Isolation and Detection of the Chlorophyll Catabolite Hydroxylating Activity from Capsicum annuum Chromoplasts
    Authors:  Mareike Hauenstein and Stefan Hörtensteiner, date: 09/20/2017, view: 30, Q&A: 0
    [Abstract] Hydroxylation of chlorophyll catabolites at the so-called C32 position (Hauenstein et al., 2016) is commonly found in all plant species analyzed to date. Here we describe an in vitro hydroxylation assay using Capsicum annuum chromoplast membranes as a source of the hydroxylating activity, which converts the ...
    Detection of Protein S-nitrosothiols (SNOs) in Plant Samples on Diaminofluorescein (DAF) Gels
    Authors:  Marta Rodríguez-Ruiz, Paulo T. Mioto, José M. Palma and Francisco J. Corpas , date: 09/20/2017, view: 22, Q&A: 0
    [Abstract] In plant cells, the analysis of protein S-nitrosothiols (SNOs) under physiological and adverse stress conditions is essential to understand the mechanisms of Nitric oxide (NO)-based signaling. We adapted a previously reported protocol for detecting protein SNOs in animal systems (King et al., 2005) for plant samples. Briefly, ...
    Ubiquitin Proteasome Activity Measurement in Total Plant Extracts
    Authors:  Suayib Üstün and Frederik Börnke, date: 09/05/2017, view: 274, Q&A: 0
    [Abstract] The fine-tuned balance of protein level, conformation and location within the cell is vital for the dynamic changes required for a cell to respond to a given stimulus. This requires the regulated turnover of damaged or short-lived proteins through the ubiquitin proteasome system (UPS). Thus, the protease activity of the proteasome is adjusted to ...
    Separation of Plant 6-Phosphogluconate Dehydrogenase (6PGDH) Isoforms by Non-denaturing Gel Electrophoresis
    [Abstract] 6-Phosphogluconate dehydrogenase (6PGDH; EC catalyzes the third and irreversible reaction of the pentose phosphate pathway (PPP). It carries out the oxidative decarboxylation of the 6-phosphogluconate to yield ribulose-5-phosphate, carbon dioxide and NADPH. In higher plants, 6PGDH has several subcellular localizations including cytosol, ...
    Extraction and Activity of O-acetylserine(thiol)lyase (OASTL) from Microalga Chlorella sorokiniana
    Authors:  Giovanna Salbitani and Simona Carfagna, date: 06/20/2017, view: 591, Q&A: 0
    [Abstract] O-acetylserine(thiol)lyase (OASTL) is an enzyme catalysing the reaction of inorganic sulphide with O-acetylserine to form the S-containing amino acid L-cysteine. Here we describe an improved protocol to evaluate the activity of this enzyme from the microalga Chlorella sorokiniana. It is a colorimetric assay based on the reaction between ...
    Protocol for Enrichment of the Membrane Proteome of Mature Tomato Pollen
    [Abstract] We established and elaborated on a method to enrich the membrane proteome of mature pollen from economically relevant crop using the example of Solanum lycopersicum (tomato). To isolate the pollen protein fraction enriched in membrane proteins, a high salt concentration (750 mM of sodium chloride) was used. The membrane protein-enriched ...
    Protein Isolation from Plasma Membrane, Digestion and Processing for Strong Cation Exchange Fractionation
    Authors:  Ning Yang, Bing Han and Tai Wang, date: 05/20/2017, view: 864, Q&A: 0
    [Abstract] Plasma membrane (PM) proteins play crucial roles in diverse biological processes. But their low abundance, alkalinity and hydrophobicity make their isolation a difficult task. This protocol describes an efficient method for PM proteins isolation, digestion and fractionation so that they can be well prepared for mass spectrometry analysis.
    Mating Based Split-ubiquitin Assay for Detection of Protein Interactions
    Authors:  Wijitra Horaruang and Ben Zhang, date: 05/05/2017, view: 1162, Q&A: 0
    [Abstract] The mating based split-ubiquitin (mbSUS) assay is an alternative method to the classical yeast two-hybrid system with a number of advantages. The mbSUS assay relies on the ubiquitin-degradation pathway as a sensor for protein-protein interactions, and it is suitable for the determination of interactions between full-length proteins that are ...
    Rapid Isolation of Total Protein from Arabidopsis Pollen
    Authors:  Ming Chang and Shanjin Huang, date: 04/20/2017, view: 848, Q&A: 0
    [Abstract] Arabidopsis pollen is an excellent system for answering important biological questions about the establishment and maintenance of cellular polarity and polar cell growth, because these processes are amenable to the genetic and genomic approaches that are readily available in Arabidopsis. Given that proteins are the direct ...
    Analyses of Root-secreted Acid Phosphatase Activity in Arabidopsis
    Authors:  Liangsheng Wang and Dong Liu, date: 04/05/2017, view: 1003, Q&A: 0
    [Abstract] Induction and secretion of acid phosphatase (APase) is a universal adaptive response of higher plants to low-phosphate stress (Tran et al., 2010). The intracellular APases are likely involved in the remobilization and recycling of phosphate (Pi) from intracellular Pi reserves, whereas the extracellular or secreted APases are believed to ...