1
|
Riemer E, Qiu D, Laha D, Harmel RK, Gaugler P, Gaugler V, Frei M, Hajirezaei MR, Laha NP, Krusenbaum L, Schneider R, Saiardi A, Fiedler D, Jessen HJ, Schaaf G, Giehl RFH. ITPK1 is an InsP 6/ADP phosphotransferase that controls phosphate signaling in Arabidopsis. Mol Plant 2021; 14:1864-1880. [PMID: 34274522 PMCID: PMC8573591 DOI: 10.1016/j.molp.2021.07.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 05/20/2023]
Abstract
In plants, phosphate (Pi) homeostasis is regulated by the interaction of PHR transcription factors with stand-alone SPX proteins, which act as sensors for inositol pyrophosphates. In this study, we combined different methods to obtain a comprehensive picture of how inositol (pyro)phosphate metabolism is regulated by Pi and dependent on the inositol phosphate kinase ITPK1. We found that inositol pyrophosphates are more responsive to Pi than lower inositol phosphates, a response conserved across kingdoms. Using the capillary electrophoresis electrospray ionization mass spectrometry (CE-ESI-MS) we could separate different InsP7 isomers in Arabidopsis and rice, and identify 4/6-InsP7 and a PP-InsP4 isomer hitherto not reported in plants. We found that the inositol pyrophosphates 1/3-InsP7, 5-InsP7, and InsP8 increase several fold in shoots after Pi resupply and that tissue-specific accumulation of inositol pyrophosphates relies on ITPK1 activities and MRP5-dependent InsP6 compartmentalization. Notably, ITPK1 is critical for Pi-dependent 5-InsP7 and InsP8 synthesis in planta and its activity regulates Pi starvation responses in a PHR-dependent manner. Furthermore, we demonstrated that ITPK1-mediated conversion of InsP6 to 5-InsP7 requires high ATP concentrations and that Arabidopsis ITPK1 has an ADP phosphotransferase activity to dephosphorylate specifically 5-InsP7 under low ATP. Collectively, our study provides new insights into Pi-dependent changes in nutritional and energetic states with the synthesis of regulatory inositol pyrophosphates.
Collapse
Affiliation(s)
- Esther Riemer
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Danye Qiu
- Department of Chemistry and Pharmacy and CIBSS-Centre for Integrative Biological Signalling Studies, Albert-Ludwigs University Freiburg, 79104 Freiburg, Germany
| | - Debabrata Laha
- Medical Research Council Laboratory for Molecular Cell Biology (MRC-LMCB), University College London, London WC1E 6BT, UK; Department of Biochemistry, Indian Institute of Science, Bengaluru, Karnataka 560 012, India
| | - Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125 Berlin, Germany; Department of Chemistry, Humboldt Universität zu Berlin, 12489 Berlin, Germany
| | - Philipp Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Verena Gaugler
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Michael Frei
- Institute of Agronomy and Crop Physiology, Justus-Liebig University Giessen, 35392 Giessen, Germany
| | - Mohammad-Reza Hajirezaei
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, 06466 Gatersleben, Germany
| | - Nargis Parvin Laha
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Lukas Krusenbaum
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Robin Schneider
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology (MRC-LMCB), University College London, London WC1E 6BT, UK
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125 Berlin, Germany; Department of Chemistry, Humboldt Universität zu Berlin, 12489 Berlin, Germany
| | - Henning J Jessen
- Department of Chemistry and Pharmacy and CIBSS-Centre for Integrative Biological Signalling Studies, Albert-Ludwigs University Freiburg, 79104 Freiburg, Germany
| | - Gabriel Schaaf
- Department of Plant Nutrition, Institute of Crop Science and Resource Conservation, Rheinische Friedrich-Wilhelms-Universität Bonn, 53115 Bonn, Germany.
| | - Ricardo F H Giehl
- Department of Physiology & Cell Biology, Leibniz-Institute of Plant Genetics and Crop Plant Research, 06466 Gatersleben, Germany.
| |
Collapse
|
2
|
Röhm K, Gonzalez-Uarquin F, Harmel RK, Nguyen Trung M, Diener M, Fiedler D, Huber K, Seifert J. Investigation of a potential electrogenic transport-system for myo-inositol in the small intestine of laying hens. Br Poult Sci 2021; 63:91-97. [PMID: 34297639 DOI: 10.1080/00071668.2021.1958301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
1. Myo-inositol (MI) is an essential metabolite for cell function in animals and humans. The aim of this study was to characterise the transport mechanism of MI in the small intestine of laying hens as there is a lack of knowledge about the MI uptake mechanisms. The hypothesised secondary active, cation coupled transport of MI was assessed by electrophysiological measurements with Ussing chambers, and was compared to the electrophysiology of glucose transport.2. Twenty-six laying hens were used. The potential ion-dependent transport was tested in tissue of the small intestine. Barrier function of the tissue was shown by determining the transepithelial resistance. During the experiments, mucosal and serosal buffers were sampled to measure time-dependent changes in MI concentrations. Samples from eight hens were further used for Western blot analyses of the jejunal apical membranes.3. Active MI transport, indicated by changes in the short circuit current after MI addition, could not be demonstrated in the Ussing chambers experiments. MI was further not detectable in the serosal buffer, nor in the lysates of mucosal tissue cytoplasm nor lipids. Thus, there was no evidence for a MI transport or absorption. However, Western blot analyses of the jejunal apical membrane revealed signals indicated the expression of the MI transport proteins SMIT-1 and SMIT-2.4. In conclusion, the MI transport process in the chicken intestine is more complex than it was presumed and is probably influenced by still unknown regulations or metabolic processes.
Collapse
Affiliation(s)
- K Röhm
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - F Gonzalez-Uarquin
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - R K Harmel
- Department of Chemical Biology I, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - M Nguyen Trung
- Department of Chemical Biology I, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - M Diener
- Institute of Veterinary Physiology and Biochemistry, Justus-Liebig University Giessen, Giessen, Germany
| | - D Fiedler
- Department of Chemical Biology I, Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany
| | - K Huber
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| | - J Seifert
- Institute of Animal Science, University of Hohenheim, Stuttgart, Germany
| |
Collapse
|
3
|
Liao G, Ye W, Heitmann T, Ernst G, DePasquale M, Xu L, Wormald M, Hu X, Ferrer M, Harmel RK, Fiedler D, Barrow J, Wei H. Identification of Small-Molecule Inhibitors of Human Inositol Hexakisphosphate Kinases by High-Throughput Screening. ACS Pharmacol Transl Sci 2021; 4:780-789. [PMID: 33860201 DOI: 10.1021/acsptsci.0c00218] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2020] [Indexed: 01/15/2023]
Abstract
Inositol hexakisphosphate kinases (IP6Ks) catalyze pyrophosphorylation of inositol hexakisphosphate (IP6) into inositol 5-diphospho-1,2,3,4,6-pentakisphosphate (IP7), which is involved in numerous areas of cell physiology including glucose homeostasis, blood coagulation, and neurological development. Inhibition of IP6Ks may be effective for the treatment of Type II diabetes, obesity, metabolic complications, thrombosis, and psychiatric disorders. We performed a high-throughput screen (HTS) of 158 410 compounds for IP6K1 inhibitors using a previously developed ADP-Glo Max assay. Of these, 1206 compounds were found to inhibit IP6K1 kinase activity by more than 25%, representing a 0.8% hit rate. Structural clustering analysis of HTS-active compounds, which were confirmed in the dose-response testing using the same kinase assay, revealed diverse clusters that were feasible for future structure-activity relationship (SAR) optimization to potent IP6K inhibitors. Medicinal chemistry SAR efforts in three chemical series identified potent IP6K1 inhibitors which were further validated in an orthogonal LC-MS IP7 analysis. The effects of IP6K1 inhibitors on cellular IP7 levels were further confirmed and were found to correlate with cellular IP6K1 binding measured by a high-throughput cellular thermal shift assay (CETSA).
Collapse
Affiliation(s)
- Gangling Liao
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Wenjuan Ye
- National Center for Advancing Translational Sciences, Rockville 20850, Maryland, United States
| | - Tyler Heitmann
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Glen Ernst
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Michael DePasquale
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Laiyi Xu
- Department of Chemistry, McGill University, Montreal, Quebec H3A 0G4, Canada
| | - Michael Wormald
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Xin Hu
- National Center for Advancing Translational Sciences, Rockville 20850, Maryland, United States
| | - Marc Ferrer
- National Center for Advancing Translational Sciences, Rockville 20850, Maryland, United States
| | - Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany.,Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany.,Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - James Barrow
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| | - Huijun Wei
- Lieber Institute for Brain Development, Baltimore, Maryland 21205, United States
| |
Collapse
|
4
|
Ried MK, Wild R, Zhu J, Pipercevic J, Sturm K, Broger L, Harmel RK, Abriata LA, Hothorn LA, Fiedler D, Hiller S, Hothorn M. Inositol pyrophosphates promote the interaction of SPX domains with the coiled-coil motif of PHR transcription factors to regulate plant phosphate homeostasis. Nat Commun 2021; 12:384. [PMID: 33452263 PMCID: PMC7810988 DOI: 10.1038/s41467-020-20681-4] [Citation(s) in RCA: 76] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Accepted: 12/09/2020] [Indexed: 12/05/2022] Open
Abstract
Phosphorus is an essential nutrient taken up by organisms in the form of inorganic phosphate (Pi). Eukaryotes have evolved sophisticated Pi sensing and signaling cascades, enabling them to stably maintain cellular Pi concentrations. Pi homeostasis is regulated by inositol pyrophosphate signaling molecules (PP-InsPs), which are sensed by SPX domain-containing proteins. In plants, PP-InsP-bound SPX receptors inactivate Myb coiled-coil (MYB-CC) Pi starvation response transcription factors (PHRs) by an unknown mechanism. Here we report that a InsP8–SPX complex targets the plant-unique CC domain of PHRs. Crystal structures of the CC domain reveal an unusual four-stranded anti-parallel arrangement. Interface mutations in the CC domain yield monomeric PHR1, which is no longer able to bind DNA with high affinity. Mutation of conserved basic residues located at the surface of the CC domain disrupt interaction with the SPX receptor in vitro and in planta, resulting in constitutive Pi starvation responses. Together, our findings suggest that InsP8 regulates plant Pi homeostasis by controlling the oligomeric state and hence the promoter binding capability of PHRs via their SPX receptors. Plants regulate phosphate homeostasis via the interaction of PHR transcription factors with SPX receptors bound to inositol pyrophosphate signaling molecules. Here the authors show that inositol pyrophosphate-bound SPX interacts with the coiled-coil domain of PHR, which regulates the oligomerization and activity of the transcription factor.
Collapse
Affiliation(s)
- Martina K Ried
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland.,Leibniz Institute of Plant Biochemistry, 06120, Halle, Germany
| | - Rebekka Wild
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland.,Institut de Biologie Structurale (IBS), 38044, Grenoble, France
| | - Jinsheng Zhu
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland
| | | | - Kristina Sturm
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland
| | - Larissa Broger
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland
| | - Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125, Berlin, Germany.,Department of Chemistry, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | - Luciano A Abriata
- Protein production and structure Core Facility, EPFL, 1015, Lausanne, Switzerland
| | - Ludwig A Hothorn
- Institute of Biostatistics, Leibniz University, 30419, Hannover, Germany
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125, Berlin, Germany.,Department of Chemistry, Humboldt-Universität zu Berlin, 12489, Berlin, Germany
| | | | - Michael Hothorn
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, 1211, Geneva, Switzerland.
| |
Collapse
|
5
|
Qiu D, Wilson MS, Eisenbeis VB, Harmel RK, Riemer E, Haas TM, Wittwer C, Jork N, Gu C, Shears SB, Schaaf G, Kammerer B, Fiedler D, Saiardi A, Jessen HJ. Analysis of inositol phosphate metabolism by capillary electrophoresis electrospray ionization mass spectrometry. Nat Commun 2020; 11:6035. [PMID: 33247133 PMCID: PMC7695695 DOI: 10.1038/s41467-020-19928-x] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/06/2020] [Indexed: 12/22/2022] Open
Abstract
The analysis of myo-inositol phosphates (InsPs) and myo-inositol pyrophosphates (PP-InsPs) is a daunting challenge due to the large number of possible isomers, the absence of a chromophore, the high charge density, the low abundance, and the instability of the esters and anhydrides. Given their importance in biology, an analytical approach to follow and understand this complex signaling hub is desirable. Here, capillary electrophoresis (CE) coupled to electrospray ionization mass spectrometry (ESI-MS) is implemented to analyze complex mixtures of InsPs and PP-InsPs with high sensitivity. Stable isotope labeled (SIL) internal standards allow for matrix-independent quantitative assignment. The method is validated in wild-type and knockout mammalian cell lines and in model organisms. SIL-CE-ESI-MS enables the accurate monitoring of InsPs and PP-InsPs arising from compartmentalized cellular synthesis pathways, by feeding cells with either [13C6]-myo-inositol or [13C6]-D-glucose. In doing so, we provide evidence for the existence of unknown inositol synthesis pathways in mammals, highlighting the potential of this method to dissect inositol phosphate metabolism and signalling. Myo-Inositol phosphates (InsPs) and pyrophosphates (PP-InsPs) are important second messengers but their analysis remains challenging. Here, the authors develop a capillary electrophoresis-mass spectrometry method for the identification and quantitation of InsP and PP-InsP isomers in cells and tissues.
Collapse
Affiliation(s)
- Danye Qiu
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany.
| | - Miranda S Wilson
- Medical Research Council, Laboratory for Molecular Cell Biology, University College London, London, WC1E 6BT, UK
| | - Verena B Eisenbeis
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany
| | - Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Esther Riemer
- Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, Rheinische Friedrich-Wilhelms-University Bonn, 53115, Bonn, Germany
| | - Thomas M Haas
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany
| | - Christopher Wittwer
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany
| | - Nikolaus Jork
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany
| | - Chunfang Gu
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA
| | - Stephen B Shears
- Signal Transduction Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, 27709, USA
| | - Gabriel Schaaf
- Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, Rheinische Friedrich-Wilhelms-University Bonn, 53115, Bonn, Germany
| | - Bernd Kammerer
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Str. 10, 13125, Berlin, Germany
| | - Adolfo Saiardi
- Medical Research Council, Laboratory for Molecular Cell Biology, University College London, London, WC1E 6BT, UK.
| | - Henning J Jessen
- Institute of Organic Chemistry, University of Freiburg, Albertstr. 21, 79104, Freiburg, Germany. .,CIBSS - Centre for Integrative Biological Signalling Studies, University of Freiburg, 79104, Freiburg, Germany.
| |
Collapse
|
6
|
|
7
|
Affiliation(s)
- Robert Puschmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Robert K. Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Robert-Rössle-Straße 10, 13125 Berlin, Germany
- Institut für Chemie, Humboldt-Universität zu Berlin, Brook-Taylor-Straße 2, 12489 Berlin, Germany
| |
Collapse
|
8
|
Zhu J, Lau K, Puschmann R, Harmel RK, Zhang Y, Pries V, Gaugler P, Broger L, Dutta AK, Jessen HJ, Schaaf G, Fernie AR, Hothorn LA, Fiedler D, Hothorn M. Two bifunctional inositol pyrophosphate kinases/phosphatases control plant phosphate homeostasis. eLife 2019; 8:43582. [PMID: 31436531 PMCID: PMC6731061 DOI: 10.7554/elife.43582] [Citation(s) in RCA: 77] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 08/21/2019] [Indexed: 12/15/2022] Open
Abstract
Many eukaryotic proteins regulating phosphate (Pi) homeostasis contain SPX domains that are receptors for inositol pyrophosphates (PP-InsP), suggesting that PP-InsPs may regulate Pi homeostasis. Here we report that deletion of two diphosphoinositol pentakisphosphate kinases VIH1/2 impairs plant growth and leads to constitutive Pi starvation responses. Deletion of phosphate starvation response transcription factors partially rescues vih1 vih2 mutant phenotypes, placing diphosphoinositol pentakisphosphate kinases in plant Pi signal transduction cascades. VIH1/2 are bifunctional enzymes able to generate and break-down PP-InsPs. Mutations in the kinase active site lead to increased Pi levels and constitutive Pi starvation responses. ATP levels change significantly in different Pi growth conditions. ATP-Mg2+ concentrations shift the relative kinase and phosphatase activities of diphosphoinositol pentakisphosphate kinases in vitro. Pi inhibits the phosphatase activity of the enzyme. Thus, VIH1 and VIH2 relay changes in cellular ATP and Pi concentrations to changes in PP-InsP levels, allowing plants to maintain sufficient Pi levels.
Collapse
Affiliation(s)
- Jinsheng Zhu
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
| | - Kelvin Lau
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
| | - Robert Puschmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany.,Department of Chemistry, Humboldt Universität zu Berlin, Berlin, Germany
| | - Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany.,Department of Chemistry, Humboldt Universität zu Berlin, Berlin, Germany
| | - Youjun Zhang
- Max-Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany.,Center of Plant System Biology and Biotechnology, Plovdiv, Bulgaria
| | - Verena Pries
- Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, University of Bonn, Bonn, Germany
| | - Philipp Gaugler
- Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, University of Bonn, Bonn, Germany
| | - Larissa Broger
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
| | - Amit K Dutta
- Institute of Organic Chemistry, Freiburg im Breisgau, Germany
| | | | - Gabriel Schaaf
- Institute of Crop Science and Resource Conservation, Department of Plant Nutrition, University of Bonn, Bonn, Germany
| | - Alisdair R Fernie
- Max-Planck Institute of Molecular Plant Physiology, Potsdam-Golm, Germany
| | - Ludwig A Hothorn
- Institute of Biostatistics, Leibniz University, Hannover, Germany
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, Berlin, Germany.,Department of Chemistry, Humboldt Universität zu Berlin, Berlin, Germany
| | - Michael Hothorn
- Structural Plant Biology Laboratory, Department of Botany and Plant Biology, University of Geneva, Geneva, Switzerland
| |
Collapse
|
9
|
Harmel RK, Puschmann R, Nguyen Trung M, Saiardi A, Schmieder P, Fiedler D. Harnessing 13C-labeled myo-inositol to interrogate inositol phosphate messengers by NMR. Chem Sci 2019; 10:5267-5274. [PMID: 31191882 PMCID: PMC6540952 DOI: 10.1039/c9sc00151d] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 04/17/2019] [Indexed: 12/12/2022] Open
Abstract
The analysis of inositol poly- and pyrophosphates, an important group of eukaryotic messengers, is enabled by applying 13C-labeled inositol.
Inositol poly- and pyrophosphates (InsPs and PP-InsPs) are an important group of metabolites and mediate a wide range of processes in eukaryotic cells. To elucidate the functions of these molecules, robust techniques for the characterization of inositol phosphate metabolism are required, both at the biochemical and the cellular level. Here, a new tool-set is reported, which employs uniformly 13C-labeled compounds ([13C6]myo-inositol, [13C6]InsP5, [13C6]InsP6, and [13C6]5PP-InsP5), in combination with commonly accessible NMR technology. This approach permitted the detection and quantification of InsPs and PP-InsPs within complex mixtures and at physiological concentrations. Specifically, the enzymatic activity of IP6K1 could be monitored in vitro in real time. Metabolic labeling of mammalian cells with [13C6]myo-inositol enabled the analysis of cellular pools of InsPs and PP-InsPs, and uncovered high concentrations of 5PP-InsP5 in HCT116 cells, especially in response to genetic and pharmacological perturbation. The reported method greatly facilitates the analysis of this otherwise spectroscopically silent group of molecules, and holds great promise to comprehensively analyze inositol-based signaling molecules under normal and pathological conditions.
Collapse
Affiliation(s)
- Robert K Harmel
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie , Robert-Rössle-Straße 10 , 13125 Berlin , Germany . .,Institute of Chemistry , Humboldt-Universität zu Berlin , Brook-Taylor-Straße 2 , 12489 Berlin , Germany
| | - Robert Puschmann
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie , Robert-Rössle-Straße 10 , 13125 Berlin , Germany . .,Institute of Chemistry , Humboldt-Universität zu Berlin , Brook-Taylor-Straße 2 , 12489 Berlin , Germany
| | - Minh Nguyen Trung
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie , Robert-Rössle-Straße 10 , 13125 Berlin , Germany . .,Institute of Chemistry , Humboldt-Universität zu Berlin , Brook-Taylor-Straße 2 , 12489 Berlin , Germany
| | - Adolfo Saiardi
- Medical Research Council Laboratory for Molecular Cell Biology , University College London , London , UK
| | - Peter Schmieder
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie , Robert-Rössle-Straße 10 , 13125 Berlin , Germany .
| | - Dorothea Fiedler
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie , Robert-Rössle-Straße 10 , 13125 Berlin , Germany . .,Institute of Chemistry , Humboldt-Universität zu Berlin , Brook-Taylor-Straße 2 , 12489 Berlin , Germany
| |
Collapse
|
10
|
Hammarström LGJ, Harmel RK, Granath M, Ringom R, Gravenfors Y, Färnegårdh K, Svensson PH, Wennman D, Lundin G, Roddis Y, Kitambi SS, Bernlind A, Lehmann F, Ernfors P. The Oncolytic Efficacy and in Vivo Pharmacokinetics of [2-(4-Chlorophenyl)quinolin-4-yl](piperidine-2-yl)methanol (Vacquinol-1) Are Governed by Distinct Stereochemical Features. J Med Chem 2016; 59:8577-92. [PMID: 27607569 DOI: 10.1021/acs.jmedchem.6b01009] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Glioblastoma remains an incurable brain cancer. Drugs developed in the past 20 years have not improved the prognosis for patients, necessitating the development of new treatments. We have previously reported the therapeutic potential of the quinoline methanol Vacquinol-1 (1) that targets glioblastoma cells and induces cell death by catastrophic vacuolization. Compound 1 is a mixture of four stereoisomers due to the two adjacent stereogenic centers in the molecule, complicating further development in the preclinical setting. This work describes the isolation and characterization of the individual isomers of 1 and shows that these display stereospecific pharmacokinetic and pharmacodynamic features. In addition, we present a stereoselective synthesis of the active isomers, providing a basis for further development of this compound series into a novel experimental therapeutic for glioblastoma.
Collapse
Affiliation(s)
| | | | - Mikael Granath
- OnTargetChemistry AB , Virdings Allé 18, SE-754 50 Uppsala, Sweden
| | - Rune Ringom
- OnTargetChemistry AB , Virdings Allé 18, SE-754 50 Uppsala, Sweden
| | - Ylva Gravenfors
- Drug Discovery and Development Platform, Science for Life Laboratory, Department of Organic Chemistry, Stockholm University , Box 1030, SE-171 21 Solna, Sweden
| | - Katarina Färnegårdh
- Drug Discovery and Development Platform, Science for Life Laboratory, Department of Organic Chemistry, Stockholm University , Box 1030, SE-171 21 Solna, Sweden
| | - Per H Svensson
- SP Process Development , Forskargatan 20J, SE-151 36 Södertälje, Sweden
| | - David Wennman
- SP Process Development , Forskargatan 20J, SE-151 36 Södertälje, Sweden
| | - Göran Lundin
- SP Process Development , Forskargatan 20J, SE-151 36 Södertälje, Sweden
| | - Ylva Roddis
- SP Process Development , Forskargatan 20J, SE-151 36 Södertälje, Sweden
| | | | | | - Fredrik Lehmann
- OnTargetChemistry AB , Virdings Allé 18, SE-754 50 Uppsala, Sweden
| | | |
Collapse
|
11
|
van der Pijl F, Harmel RK, Richelle GJJ, Janssen P, van Delft FL, Rutjes FPJT. Organocatalytic Entry into 2,6-Disubstituted Aza-Achmatowicz Piperidinones: Application to (−)-Sedacryptine and Its Epimer. Org Lett 2014; 16:2038-41. [DOI: 10.1021/ol500633u] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ferdi van der Pijl
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Robert K. Harmel
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Gaston J. J. Richelle
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Peter Janssen
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Floris L. van Delft
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| | - Floris P. J. T. Rutjes
- Institute for Molecules and
Materials, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, The Netherlands
| |
Collapse
|