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  1. IPB Halle
  2. Research
  3. Publications

    • Research Mission and Profile
    • Trenner 0
    • Molecular Signal Processing
      • Secretariat & All Staff
      • Technical Resources
      • Publications
      • Research Groups
        • Nutrient Sensing
        • Symbiosis Signaling
        • Jasmonate Signaling
    • Bioorganic Chemistry
      • Secretariat & All Staff
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      • Research Groups
        • Bioactives
        • Natural Products & Metabolomics
        • Biotechnology
        • Biofunctional Synthesis
        • Computational Chemistry
        • Data & Resources
    • Biochemistry of Plant Interactions
      • Secretariat & All Staff
      • Technical Resources
      • Publications
      • Research Groups
        • Calcium-dependent Protein Kinases
        • Cellular Signaling
        • Metabolite-based Defense Mechanisms
        • Nuclear Processes in Plant Defense
    • Cell and Metabolic Biology
      • Secretariat & All Staff
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      • Research Groups
        • Glandular Trichomes and Isoprenoid Biosynthesis
        • Jasmonate Function & Mycorrhiza
        • Phenylpropanoid Metabolism
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        • Auxin Signaling
        • Bioorganic Chemistry
        • Designer Glycans
        • Jasmonate Mode of Action
        • Protein Recognition and Degradation
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        • Signal Integration
        • Ubiquitination in Immunity
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Publications

Gladilovich, V.; Greifenhagen, U.; Sukhodolov, N.; Selyutin, A.; Singer, D.; Thieme, D.; Majovsky, P.; Shirkin, A.; Hoehenwarter, W.; Bonitenko, E.; Podolskaya, E.; Frolov, A.; Immobilized metal affinity chromatography on collapsed Langmuir-Blodgett iron(III) stearate films and iron(III) oxide nanoparticles for bottom-up phosphoproteomics J. Chromatogr. A 1443 181-190 (2016) DOI: 10.1016/j.chroma.2016.03.044
  • Abstract
  • BibText
  • RIS

Phosphorylation is the enzymatic reaction of site-specific phosphate transfer from energy-rich donors to the side chains of serine, threonine, tyrosine, and histidine residues in proteins. In living cells, reversible phosphorylation underlies a universal mechanism of intracellular signal transduction. In this context, analysis of the phosphoproteome is a prerequisite to better understand the cellular regulatory networks. Conventionally, due to the low contents of signaling proteins, selective enrichment of proteolytic phosphopeptides by immobilized metal affinity chromatography (IMAC) is performed prior to their LC–MS or -MS/MS analysis. Unfortunately, this technique still suffers from low selectivity and compromised analyte recoveries. To overcome these limitations, we propose IMAC systems comprising stationary phases based on collapsed Langmuir-Blodgett films of iron(III) stearate (FF) or iron(III) oxide nanoparticles (FO) and mobile phases relying on ammonia, piperidine and heptadecafluorooctanesulfonic acid (PFOS). Experiments with model phosphopeptides and phosphoprotein tryptic digests showed superior binding capacity, selectivity and recovery for both systems in comparison to the existing commercial analogs. As evidenced by LC–MS/MS analysis of the HeLa phosphoproteome, these features of the phases resulted in increased phosphoproteome coverage in comparison to the analogous commercially available phases, indicating that our IMAC protocol is a promising chromatographic tool for in-depth phosphoproteomic research.

Publications

Ziegler, J.; Qwegwer, J.; Schubert, M.; Lee Erickson, J.; Schattat, M.; Bürstenbinder, K.; Grubb, C. D.; Abel, S.; Simultaneous analysis of apolar phytohormones and 1-aminocyclopropan-1-carboxylic acid by high performance liquid chromatography/electrospray negative ion tandem mass spectrometry via 9-fluorenylmethoxycarbonyl chloride derivatization J. Chromatogr. A 1362 102-109 (2014) DOI: 10.1016/j.chroma.2014.08.029
  • Abstract
  • BibText
  • RIS

A strategy to detect and quantify the polar ethylene precursor 1-aminocyclopropan-1-carboxylic acid (ACC) along with the more apolar phytohormones abscisic acid (ABA), indole-3-acetic acid (IAA), jasmonic acid (JA), jasmonic acid-isoleucine conjugate (JA-Ile), 12-oxo-phytodienoic acid (OPDA), trans-zeatin, and trans-zeatin 9-riboside using a single extraction is presented. Solid phase resins commonly employed for extraction of phytohormones do not allow the recovery of ACC. We circumvent this problem by attaching an apolar group to ACC via derivatization with the amino group specific reagent 9-fluorenylmethoxycarbonyl chloride (Fmoc-Cl). Derivatization in the methanolic crude extract does not modify other phytohormones. The derivatized ACC could be purified and detected together with the more apolar phytohormones using common solid phase extraction resins and reverse phase HPLC/electrospray negative ion tandem mass spectrometry. The limit of detection was in the low nanomolar range for all phytohormones, a sensitivity sufficient to accurately determine the phytohormone levels from less than 50 mg (fresh weight) of Arabidopsis thaliana and Nicotiana benthamiana tissues. Comparison with previously published phytohormone levels and the reported changes in phytohormone levels after stress treatments confirmed the accuracy of the method.

Publications

Kramell, R.; Porzel, A.; Miersch, O.; Schneider, G.; Wasternack, C.; Chromatographic resolution of peptide-like conjugates of jasmonic acid and of cucurbic acid isomers J. Chromatogr. A 847 103-107 (1999) DOI: 10.1016/S0021-9673(99)00335-0
  • Abstract
  • BibText
  • RIS

The chiral separation of peptide-like conjugates of jasmonic acid and of cucurbic acid isomers was investigated by liquid chromatography on Chiralpak AS and Nucleodex β-PM. The retention sequences reflect distinct chromatographic properties with respect to the chirality of the jasmonic acid part or of the cucurbic acid isomers. The chromatographic behaviour of the amide conjugates on a reversed-phase C18 column provides evidence for the resolution of diastereomeric conjugates depending on the chirality of both constituents of the conjugate molecule. The chromatographic procedures are suitable for the analytical and preparative separation of such conjugates.

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