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Gypakis A, Adelt S, Lemoine H, Vogel G, Wasner HK. Activated Inositol Phosphate, Substrate for Synthesis of Prostaglandylinositol Cyclic Phosphate (Cyclic PIP)-The Key for the Effectiveness of Inositol-Feeding. Int J Mol Sci 2024; 25:1362. [PMID: 38338641 PMCID: PMC10855042 DOI: 10.3390/ijms25031362] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2023] [Revised: 01/08/2024] [Accepted: 01/12/2024] [Indexed: 02/12/2024] Open
Abstract
The natural cyclic AMP antagonist, prostaglandylinositol cyclic phosphate (cyclic PIP), is biosynthesized from prostaglandin E (PGE) and activated inositol phosphate (n-Ins-P), which is synthesized by a particulate rat-liver-enzyme from GTP and a precursor named inositol phosphate (pr-Ins-P), whose 5-ring phosphodiester structure is essential for n-Ins-P synthesis. Aortic myocytes, preincubated with [3H] myo-inositol, synthesize after angiotensin II stimulation (30 s) [3H] pr-Ins-P (65% yield), which is converted to [3H] n-Ins-P and [3H] cyclic PIP. Acid-treated (1 min) [3H] pr-Ins-P co-elutes with inositol (1,4)-bisphosphate in high performance ion chromatography, indicating that pr-Ins-P is inositol (1:2-cyclic,4)-bisphosphate. Incubation of [3H]-GTP with unlabeled pr-Ins-P gave [3H]-guanosine-labeled n-Ins-P. Cyclic PIP synthase binds the inositol (1:2-cyclic)-phosphate part of n-Ins-P to PGE and releases the [3H]-labeled guanosine as [3H]-GDP. Thus, n-Ins-P is most likely guanosine diphospho-4-inositol (1:2-cyclic)-phosphate. Inositol feeding helps patients with metabolic conditions related to insulin resistance, but explanations for this finding are missing. Cyclic PIP appears to be the key for explaining the curative effect of inositol supplementation: (1) inositol is a molecular constituent of cyclic PIP; (2) cyclic PIP triggers many of insulin's actions intracellularly; and (3) the synthesis of cyclic PIP is decreased in diabetes as shown in rodents.
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Affiliation(s)
- Antonios Gypakis
- General Secretariat for Research and Innovation, GR-11527 Athens, Greece;
| | - Stephan Adelt
- Fachbereich C—Biochemie, Bergische University, 42119 Wuppertal, Germany;
| | - Horst Lemoine
- Institute for Laser-Medicine, Molecular Drug-Research Group, Heinrich-Heine-University, 40225 Düsseldorf, Germany;
| | - Günter Vogel
- Fachbereich C—Biochemie, Bergische University, 42119 Wuppertal, Germany;
| | - Heinrich K. Wasner
- BioReg Biopharm, Technology Innovation Laboratory, University of Illinois at Chicago, Chicago, IL 60612, USA
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Combined Pharmacophore and Grid-Independent Molecular Descriptors (GRIND) Analysis to Probe 3D Features of Inositol 1,4,5-Trisphosphate Receptor (IP 3R) Inhibitors in Cancer. Int J Mol Sci 2021; 22:ijms222312993. [PMID: 34884798 PMCID: PMC8657927 DOI: 10.3390/ijms222312993] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/18/2021] [Accepted: 11/24/2021] [Indexed: 12/11/2022] Open
Abstract
Inositol 1, 4, 5-trisphosphate receptor (IP3R)-mediated Ca2+ signaling plays a pivotal role in different cellular processes, including cell proliferation and cell death. Remodeling Ca2+ signals by targeting the downstream effectors is considered an important hallmark in cancer progression. Despite recent structural analyses, no binding hypothesis for antagonists within the IP3-binding core (IBC) has been proposed yet. Therefore, to elucidate the 3D structural features of IP3R modulators, we used combined pharmacoinformatic approaches, including ligand-based pharmacophore models and grid-independent molecular descriptor (GRIND)-based models. Our pharmacophore model illuminates the existence of two hydrogen-bond acceptors (2.62 Å and 4.79 Å) and two hydrogen-bond donors (5.56 Å and 7.68 Å), respectively, from a hydrophobic group within the chemical scaffold, which may enhance the liability (IC50) of a compound for IP3R inhibition. Moreover, our GRIND model (PLS: Q2 = 0.70 and R2 = 0.72) further strengthens the identified pharmacophore features of IP3R modulators by probing the presence of complementary hydrogen-bond donor and hydrogen-bond acceptor hotspots at a distance of 7.6-8.0 Å and 6.8-7.2 Å, respectively, from a hydrophobic hotspot at the virtual receptor site (VRS). The identified 3D structural features of IP3R modulators were used to screen (virtual screening) 735,735 compounds from the ChemBridge database, 265,242 compounds from the National Cancer Institute (NCI) database, and 885 natural compounds from the ZINC database. After the application of filters, four compounds from ChemBridge, one compound from ZINC, and three compounds from NCI were shortlisted as potential hits (antagonists) against IP3R. The identified hits could further assist in the design and optimization of lead structures for the targeting and remodeling of Ca2+ signals in cancer.
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Ismatullah H, Jabeen I, Saeed MT. Biological Regulatory Network (BRN) Analysis and Molecular Docking Simulations to Probe the Modulation of IP 3R Mediated Ca 2+ Signaling in Cancer. Genes (Basel) 2020; 12:34. [PMID: 33383780 PMCID: PMC7823498 DOI: 10.3390/genes12010034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 12/21/2020] [Accepted: 12/23/2020] [Indexed: 12/21/2022] Open
Abstract
Inositol trisphosphate receptor (IP3R) mediated Ca+2 signaling is essential in determining the cell fate by regulating numerous cellular processes, including cell division and cell death. Despite extensive studies about the characterization of IP3R in cancer, the underlying molecular mechanism initiating the cell proliferation and apoptosis remained enigmatic. Moreover, in cancer, the modulation of IP3R in downstream signaling pathways, which control oncogenesis and cancer progression, is not well characterized. Here, we constructed a biological regulatory network (BRN), and describe the remodeling of IP3R mediated Ca2+ signaling as a central key that controls the cellular processes in cancer. Moreover, we summarize how the inhibition of IP3R affects the deregulated cell proliferation and cell death in cancer cells and results in the initiation of pro-survival responses in resistance of cell death in normal cells. Further, we also investigated the role of stereo-specificity of IP3 molecule and its analogs in binding with the IP3 receptor. Molecular docking simulations showed that the hydroxyl group at R6 position along with the phosphate group at R5 position in 'R' conformation is more favorable for IP3 interactions. Additionally, Arg-266 and Arg-510 showed π-π and hydrogen bond interactions and Ser-278 forms hydrogen bond interactions with the IP3 binding site. Thus, they are identified as crucial for the binding of antagonists.
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Affiliation(s)
| | - Ishrat Jabeen
- Research Center for Modeling and Simulation (RCMS), National University of Sciences and Technology (NUST), Academic-I Building, H-12 Islamabad 44000, Pakistan; (H.I.); (M.T.S.)
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Abstract
The multitudinous inositol phosphate family elicits a wide range of molecular effects that regulate countless biological responses. In this review, I provide a methodological viewpoint of the manner in which key advances in the field of inositol phosphate research were made. I also note some of the considerable challenges that still lie ahead.
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Affiliation(s)
- Stephen B Shears
- Laboratory of Signal Transduction, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, NC, USA.
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Banegas-Luna AJ, Cerón-Carrasco JP, Puertas-Martín S, Pérez-Sánchez H. BRUSELAS: HPC Generic and Customizable Software Architecture for 3D Ligand-Based Virtual Screening of Large Molecular Databases. J Chem Inf Model 2019; 59:2805-2817. [DOI: 10.1021/acs.jcim.9b00279] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Antonio J. Banegas-Luna
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos s/n, 30107 Murcia, Spain
| | - José P. Cerón-Carrasco
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos s/n, 30107 Murcia, Spain
| | - Savíns Puertas-Martín
- Supercomputing - Algorithms Research Group (SAL), Department of Informatics, University of Almería, Agrifood Campus of International Excellence, ceiA3, Almería, 04120, Spain
| | - Horacio Pérez-Sánchez
- Bioinformatics and High Performance Computing Research Group (BIO-HPC), Computer Engineering Department, Universidad Católica San Antonio de Murcia (UCAM), Campus de los Jerónimos s/n, 30107 Murcia, Spain
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Kelebekli L. Stereospecific Synthesis of 1,4-di-O-methyl-myo-inositol (liriodendritol). JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/030823407x262463] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
1,4-di- O-methyl- myo-inositol, a natural product, was synthesised starting from p-benzoquinone. The treatment of 5,6-dibromocyclohex-2-ene-1,4-diol with Na/ROH-system afforded a C2-symmetric conduritol-B derivative key intermediate followed by acetylation. The OsO4 oxidation and followed by acetylation gave the tetraacetates. The hydrolysis of the acetate groups furnished the desired the myo-inositol derivatives in high yield.
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Affiliation(s)
- Latif Kelebekli
- Department of Chemistry, Faculty of Arts and Science, Atatürk University, 25240 Erzurum, Turkey
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Padiyar LT, Zulueta MML, Sabbavarapu NM, Hung SC. Yb(OTf) 3-Catalyzed Desymmetrization of myo-Inositol 1,3,5-Orthoformate and Its Application in the Synthesis of Chiral Inositol Phosphates. J Org Chem 2017; 82:11418-11430. [PMID: 29019688 DOI: 10.1021/acs.joc.7b01919] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
A variety of inositol phosphates including myo-inositol 1,4,5-trisphosphate, which is a secondary messenger in transmembrane signaling, were selectively synthesized via Yb(OTf)3-catalyzed desymmetrization of myo-inositol 1,3,5-orthoformate using a proline-based chiral anhydride as an acylation precursor. The investigated catalytic system could regioselectively differentiate the enantiotopic hydroxy groups of myo-inositol 1,3,5-orthoformate in the presence of a chiral auxiliary. This key step to generate a suitably protected chiral myo-inositol derivatives is described here as a unified approach to access inositol phosphates.
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Affiliation(s)
- Laxmansingh T Padiyar
- Genomics Research Center, Academia Sinica , 128 Section 2 Academia Road, Taipei 115, Taiwan
| | - Medel Manuel L Zulueta
- Genomics Research Center, Academia Sinica , 128 Section 2 Academia Road, Taipei 115, Taiwan
| | | | - Shang-Cheng Hung
- Genomics Research Center, Academia Sinica , 128 Section 2 Academia Road, Taipei 115, Taiwan
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Duchek J, Adams DR, Hudlicky T. Chemoenzymatic Synthesis of Inositols, Conduritols, and Cyclitol Analogues. Chem Rev 2011; 111:4223-58. [DOI: 10.1021/cr1004138] [Citation(s) in RCA: 115] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Jan Duchek
- Department of Chemistry and the Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines ON L2S 3A1, Canada
| | - David R. Adams
- Department of Chemistry and the Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines ON L2S 3A1, Canada
| | - Tomas Hudlicky
- Department of Chemistry and the Centre for Biotechnology, Brock University, 500 Glenridge Avenue, St. Catharines ON L2S 3A1, Canada
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12
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Kallert DM, Ponader S, Adelt S, Kaese P, Geyer R, Haas W, El-Matbouli M. Analysis of rainbow trout Oncorhynchus mykiss epidermal mucus and evaluation of semiochemical activity for polar filament discharge in Myxobolus cerebralis actinospores. JOURNAL OF FISH BIOLOGY 2010; 77:1579-1598. [PMID: 21078020 DOI: 10.1111/j.1095-8649.2010.02785.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
As myxozoan actinospores are stimulated by fish epidermal mucus to attach to their hosts via extrusion of filaments from specialized organelles, the polar capsules, mucus components were tested for discharge triggering activity on Myxobolus cerebralis actinospores. Using various methodological approaches, a selective exclusion of candidate substances based on experimental outcome is provided and the physiochemical traits of the putative agents are explored to create a basis for the isolation of the host recognition chemostimuli. Activity was detected in compounds that can be characterized as small molecular, amphiphilic to slightly hydrophobic organic substances. They were separable by chromatographic methods using reversed phase C18 supports. An active fraction was isolated by solid phase extraction comprising at least nine UV-detectable constituents as shown by thin-layer chromatography. By means of biochemical fractionation and analysis of host fish mucus, non-volatile inorganic electrolytes, all volatiles, free L-amino acids, glycoproteins, bound and free hexoses, sialic acids, glycans, proteins, urea, amines and inositols were shown not to trigger polar filament discharge. The results contribute to the identification of the attachment host cues and enable a more focused laboratory activation of myxozoan actinospores.
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Affiliation(s)
- D M Kallert
- Fish Medicine and Livestock Management, Department for Farm Animals and Veterinary Public Health, University of Veterinary Medicine, Veterinärplatz 1, 1210 Vienna, Austria
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13
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Jin MY, Hwang GS, Chae HI, Jung SH, Ryu DH. Highly Efficient Synthesis of (+)-Bromoxone, (+)-Epiepoxydon and (+)-Epiepoformin. B KOREAN CHEM SOC 2010. [DOI: 10.5012/bkcs.2010.31.03.727] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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14
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Sauer K, Huang YH, Lin H, Sandberg M, Mayr GW. Phosphoinositide and inositol phosphate analysis in lymphocyte activation. CURRENT PROTOCOLS IN IMMUNOLOGY 2009; Chapter 11:11.1.1-11.1.46. [PMID: 19918943 PMCID: PMC4500525 DOI: 10.1002/0471142735.im1101s87] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Lymphocyte antigen receptor engagement profoundly changes the cellular content of phosphoinositide lipids and soluble inositol phosphates. Among these, the phosphoinositides phosphatidylinositol 4,5-bisphosphate (PIP2) and phosphatidylinositol 3,4,5-trisphosphate (PIP3) play key signaling roles by acting as pleckstrin homology (PH) domain ligands that recruit signaling proteins to the plasma membrane. Moreover, PIP2 acts as a precursor for the second messenger molecules diacylglycerol and soluble inositol 1,4,5-trisphosphate (IP3), essential mediators of PKC, Ras/Erk, and Ca2+ signaling in lymphocytes. IP3 phosphorylation by IP3 3-kinases generates inositol 1,3,4,5-tetrakisphosphate (IP4), an essential soluble regulator of PH domain binding to PIP3 in developing T cells. Besides PIP2, PIP3, IP3, and IP4, lymphocytes produce multiple other phosphoinositides and soluble inositol phosphates that could have important physiological functions. To aid their analysis, detailed protocols that allow one to simultaneously measure the levels of multiple different phosphoinositide or inositol phosphate isomers in lymphocytes are provided here. They are based on thin layer, conventional and high-performance liquid chromatographic separation methods followed by radiolabeling or non-radioactive metal-dye detection. Finally, less broadly applicable non-chromatographic methods for detection of specific phosphoinositide or inositol phosphate isomers are discussed. Support protocols describe how to obtain pure unstimulated CD4+CD8+ thymocyte populations for analyses of inositol phosphate turnover during positive and negative selection, key steps in T cell development.
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Affiliation(s)
- Karsten Sauer
- The Scripps Research Institute, La Jolla, California
| | | | - Hongying Lin
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Mark Sandberg
- Genomics Institute of the Novartis Research Foundation (GNF), San Diego, California
| | - Georg W Mayr
- University Medical Center Hamburg-Eppendorf, Hamburg, Germany
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15
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Gonzalez-Bulnes P, Casas J, Delgado A, Llebaria A. Practical synthesis of (−)-1-amino-1-deoxy-myo-inositol from achiral precursors. Carbohydr Res 2007; 342:1947-52. [PMID: 17524374 DOI: 10.1016/j.carres.2007.04.024] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2007] [Revised: 04/13/2007] [Accepted: 04/22/2007] [Indexed: 11/30/2022]
Abstract
A new synthesis of enantiomerically pure 1-amino-1-deoxy-myo-inositol is reported. The route described employs p-benzoquinone, an achiral compound, as the starting material to give conduritol B tetraacetate in three steps. Kinetic resolution of this compound using a palladium catalyst with a chiral ligand allows access to a conduritol B tetraester in high enantiomeric excess. This compound is transformed into tetrabenzyl conduritol B epoxide, which is regioselectively opened with azide to give the key azidocyclitol. Final transformation into (-)-1-amino-1-deoxy-myo-inositol hydrochloride is achieved in four synthetic steps. This sequence allows the synthesis of this compound in high enantiomeric purity in a semi-preparative scale.
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Affiliation(s)
- Patricia Gonzalez-Bulnes
- Research Unit on Bioactive Molecules (RUBAM), Departament de Química Orgànica Biològica, Institut d' Investigacions Químiques, i Ambientals de Barcelona (IIQAB-CSIC), Jordi Girona 18-26, 08034 Barcelona, Spain
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16
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Total synthesis of the epoxyquinol dimer (+)-panepophenanthrin: application of a diastereospecific biomimetic Diels–Alder dimerisation. Tetrahedron 2006. [DOI: 10.1016/j.tet.2006.08.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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17
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Meyer O, Ponaire S, Rohmer M, Grosdemange-Billiard C. Lewis Acid Mediated Regioselective Ring Opening of Benzylglycidol with Dibenzyl Phosphate: Short and Attractive Synthesis of Dihydroxyacetone Phosphate. Org Lett 2006; 8:4347-50. [PMID: 16956223 DOI: 10.1021/ol061748a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A novel, mild, and efficient method was described to introduce a dibenzyl phosphate by ring opening of benzylglycidol mediated by Lewis acids. This methodology was used as a key step for synthesizing the dihydroxyacetone phosphate (DHAP) in only three steps with an overall yield of 74% from the commercially available racemic benzylglycidol.
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Affiliation(s)
- Odile Meyer
- Université Louis Pasteur, CNR LC3-UMR 7177, Institut Le Bel, 4 rue Blaise Pascal, 67070 Strasbourg Cedex, France
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18
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Fischbach A, Adelt S, Müller A, Vogel G. Disruption of inositol biosynthesis through targeted mutagenesis in Dictyostelium discoideum: generation and characterization of inositol-auxotrophic mutants. Biochem J 2006; 397:509-18. [PMID: 16599905 PMCID: PMC1533318 DOI: 10.1042/bj20060277] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
myo-Inositol and its downstream metabolites participate in diverse physiological processes. Nevertheless, considering their variety, it is likely that additional roles are yet to be uncovered. Biosynthesis of myo-inositol takes place via an evolutionarily conserved metabolic pathway and is strictly dependent on inositol-3-phosphate synthase (EC 5.5.1.4). Genetic manipulation of this enzyme will disrupt the cellular inositol supply. Two methods, based on gene deletion and antisense strategy, were used to generate mutants of the cellular slime mould Dictyostelium discoideum. These mutants are inositol-auxotrophic and show phenotypic changes under inositol starvation. One remarkable attribute is their inability to live by phagocytosis of bacteria, which is the exclusive nutrient source in their natural environment. Cultivated on fluid medium, the mutants lose their viability when deprived of inositol for longer than 24 h. Here, we report a study of the alterations in the first 24 h in cellular inositol, inositol phosphate and phosphoinositide concentrations, whereby a rapidly accumulating phosphorylated compound was detected. After its identification as 2,3-BPG (2,3-bisphosphoglycerate), evidence could be found that the internal disturbances of inositol homoeostasis trigger the accumulation. In a first attempt to characterize this as a physiologically relevant response, the efficient in vitro inhibition of a D. discoideum inositol-polyphosphate 5-phosphatase (EC 3.1.3.56) by 2,3-BPG is presented.
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Affiliation(s)
- Andreas Fischbach
- Fachbereich C – Biochemie, Bergische Universität Wuppertal, Gaussstrasse 20, D-42119 Wuppertal, Germany
| | - Stephan Adelt
- Fachbereich C – Biochemie, Bergische Universität Wuppertal, Gaussstrasse 20, D-42119 Wuppertal, Germany
| | - Alexander Müller
- Fachbereich C – Biochemie, Bergische Universität Wuppertal, Gaussstrasse 20, D-42119 Wuppertal, Germany
| | - Günter Vogel
- Fachbereich C – Biochemie, Bergische Universität Wuppertal, Gaussstrasse 20, D-42119 Wuppertal, Germany
- To whom correspondence should be addressed (email )
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Morgan AJ, Komiya S, Xu Y, Miller SJ. Unified Total Syntheses of the Inositol Polyphosphates: d-I-3,5,6P3, d-I-3,4,5P3, d-I-3,4,6P3, and d-I-3,4,5,6P4 via Catalytic Enantioselective and Site-Selective Phosphorylation. J Org Chem 2006; 71:6923-31. [PMID: 16930046 DOI: 10.1021/jo0610816] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Synthetic routes to various inositol polyphosphates have been discovered utilizing catalytic enantioselective and site-selective phosphorylation reactions. The syntheses described herein exploit a common intermediate to gain efficient access to eight unique inositol polyphosphates.
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Affiliation(s)
- Adam J Morgan
- Department of Chemistry, Boston College, Chestnut Hill, MA 02467, USA
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20
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Riley AM, Deleu S, Qian X, Mitchell J, Chung SK, Adelt S, Vogel G, Potter BVL, Shears SB. On the contribution of stereochemistry to human ITPK1 specificity: Ins(1,4,5,6)P4 is not a physiologic substrate. FEBS Lett 2005; 580:324-30. [PMID: 16376887 DOI: 10.1016/j.febslet.2005.12.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2005] [Accepted: 12/06/2005] [Indexed: 11/17/2022]
Abstract
Ins(1,4,5,6)P4, a biologically active cell constituent, was recently advocated as a substrate of human Ins(3,4,5,6)P4 1-kinase (hITPK1), because stereochemical factors were believed relatively unimportant to specificity [Miller, G.J., Wilson, M.P., Majerus, P.W. and Hurley, J.H. (2005) Specificity determinants in inositol polyphosphate synthesis: crystal structure of inositol 1,3,4-triphosphate 5/6-kinase. Mol. Cell. 18, 201-212]. Contrarily, we provide three examples of hITPK1 stereospecificity. hITPK1 phosphorylates only the 1-hydroxyl of both Ins(3,5,6)P3 and the meso-compound, Ins(4,5,6)P3. Moreover, hITPK1 has >13,000-fold preference for Ins(3,4,5,6)P4 over its enantiomer, Ins(1,4,5,6)P4. The biological significance of hITPK1 being stereospecific, and not physiologically phosphorylating Ins(1,4,5,6)P4, is reinforced by our demonstrating that Ins(1,4,5,6)P4 is phosphorylated (K(m) = 0.18 microM) by inositolphosphate-multikinase.
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Affiliation(s)
- Andrew M Riley
- Wolfson Laboratory for Medicinal Chemistry, Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK
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Miyashita K, Imanishi T. Syntheses of Natural Products Having an Epoxyquinone Structure. Chem Rev 2005; 105:4515-36. [PMID: 16351052 DOI: 10.1021/cr040613k] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kazuyuki Miyashita
- Graduate School of Pharmaceutical Sciences, Osaka University, Suita, Japan
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Podeschwa MAL, Plettenburg O, Altenbach HJ. Flexible Stereo- and Regioselective Synthesis ofmyo-Inositol Phosphates(Part 2): Via Nonsymmetrical Conduritol B Derivatives. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400918] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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23
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Flexible Stereo- and Regioselective Synthesis ofmyo-Inositol Phosphates(Part 1): Via Symmetrical Conduritol B Derivatives. European J Org Chem 2005. [DOI: 10.1002/ejoc.200400911] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Marco-Contelles J, Molina MT, Anjum S. Naturally occurring cyclohexane epoxides: sources, biological activities, and synthesis. Chem Rev 2005; 104:2857-99. [PMID: 15186183 DOI: 10.1021/cr980013j] [Citation(s) in RCA: 205] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- José Marco-Contelles
- Laboratorio de Radicales Libres (IQOG, CSIC), C/Juan de la Cierva, 3, 28006-Madrid, Spain
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25
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Barros MT, Matias PM, Maycock CD, Ventura MR. Aziridines as a Protecting and Directing Group. Stereoselective Synthesis of (+)-Bromoxone. Org Lett 2003; 5:4321-3. [PMID: 14601990 DOI: 10.1021/ol035576i] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
[reaction: see text] The directing ability of an aziridine group for the epoxidation of adjacent double bonds is demonstrated. The aziridine group is also used to effectively protect a double bond in a cycloenone system for a short synthesis of the title compound.
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Affiliation(s)
- M Teresa Barros
- Departamento de Química, Faculdade de Ciências e Tecnologia da Universidade Nova de Lisboa, 2825 Monte da Caparica, Portugal
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26
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Stricker R, Vandekerckhove J, Krishna MU, Falck JR, Hanck T, Reiser G. Oligomerization controls in tissue-specific manner ligand binding of native, affinity-purified p42IP4/centaurin α1 and cytohesins—proteins with high affinity for the messengers d-inositol 1,3,4,5-tetrakisphosphate/phosphatidylinositol 3,4,5-trisphosphate. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2003; 1651:102-15. [PMID: 14499594 DOI: 10.1016/s1570-9639(03)00241-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Several distinct receptor proteins for the second messengers Ins(1,3,4,5)P(4) and PtdIns(3,4,5)P(3) are already known, such as the brain-specific p42(IP4), which we have previously cloned from different species, and cytohesins. However, it is still unclear whether proteins interacting with phosphoinositide and inositolpolyphosphate second messengers are regulated differently in different tissues. Here, we investigated these native proteins for comparison also from rat lung cytosol and purified them by PtdIns(3,4,5)P(3) affinity chromatography. Proteins selectively binding Ins(1,3,4,5)P(4) with high affinity also showed high affinity and specificity towards PtdIns(3,4,5)P(3). In lung cytosol, two prominent protein bands were found in the eluate from a PtdIns(3,4,5)P(3) affinity column. We identified these proteins by mass spectrometry as the cytohesin family of Arf guanosine nucleotide exchange factors (cytohesin 1, ARNO, GRP-1) and as Bruton's tyrosine kinase. Western blot analysis indicated that p42(IP4) was present in lung only at very low concentrations. Applying the affinity purification scheme established for rat lung cytosol to cytosol from rat brain, however, yielded only p42(IP4). We identified cytohesins in rat brain by Western blotting and PCR, but cytohesins surprisingly did not bind to the PtdIns(3,4,5)P(3)-affinity column. Gel filtration experiments of brain cytosol revealed that brain cytohesins are bound to large molecular weight complexes (150 to more than 500 kDa). Thus, we hypothesize that this finding explains why brain cytohesins apparently do not bind the inositolphosphate ligand. In lung cytosol, on the other hand, cytohesins occur as dimers. Gel filtration also showed that p42(IP4) in brain cytosol occurs as a monomer. Thus, oligomerization (homomeric or heteromeric) of InsP(4)/PtdInsP(3) binding proteins can modulate their function in a tissue-dependent manner because it can modify their ability to interact with the ligands.
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Affiliation(s)
- Rolf Stricker
- Institut für Neurobiochemie, Medizinische Fakultät der Otto-von-Guericke-Universität Magdeburg, 39120 Magdeburg, Germany
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27
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Abstract
[reaction: see text] The biomimetic synthesis of the racemic dimer panepophenanthrin was achieved in good yield employing a tandem reaction sequence.
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Affiliation(s)
- John E Moses
- Dyson Perrins Laboratory, Oxford University, South Parks Road, Oxford OX1 3QY, UK
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28
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Total synthesis of (+)-epiepoformin, (+)-epiepoxydon and (+)-bromoxone employing a useful chiral building block, ethyl (1R,2S)-5,5-ethylenedioxy-2-hydroxycyclohexanecarboxylate. Tetrahedron 2003. [DOI: 10.1016/s0040-4020(03)00119-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Adelt S, Podeschwa M, Dallmann G, Altenbach HJ, Vogel G. Stereo- and regiospecificity of yeast phytases-chemical synthesis and enzymatic conversion of the substrate analogues neo- and L-chiro-inositol hexakisphosphate. Bioorg Chem 2003; 31:44-67. [PMID: 12697168 DOI: 10.1016/s0045-2068(02)00523-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Phytases are enzymes that catalyze the hydrolysis of phosphate esters in myo-inositol hexakisphosphate (phytic acid). The precise routes of enzymatic dephosphorylation by phytases of the yeast strains Saccharomyces cerevisiae and Pichia rhodanensis have been investigated up to the myo-inositol trisphosphate level, including the absolute configuration of the intermediates. Stereoselective assignment of the myo-inositol pentakisphosphates (D-myo-inositol 1,2,4,5,6-pentakisphosphate and D-myo-inositol 1,2,3,4,5-pentakisphosphate) generated was accomplished by a new method based on enantiospecific enzymatic conversion and HPLC analysis. Via conduritol B or E derivatives the total syntheses of two epimers of myo-inositol hexakisphosphate, neo-inositol hexakisphosphate and L-chiro-inositol hexakisphosphate were performed to examine the specificity of the yeast phytases with these substrate analogues. A comparison of kinetic data and the degradation pathways determined gave the first hints about the molecular recognition of inositol hexakisphosphates by the enzymes. Exploitation of the high stereo- and regiospecificity observed in the dephosphorylation of neo- and L-chiro-inositol hexakisphosphate made it possible to establish enzyme-assisted steps for the synthesis of D-neo-inositol 1,2,5,6-tetrakisphosphate, L-chiro-inositol 1,2,3,5,6-pentakisphosphate and L-chiro-inositol 1,2,3,6-tetrakisphosphate.
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Affiliation(s)
- Stephan Adelt
- Institut für Biochemie, Fachbereich 9-Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42097 Wuppertal, Germany
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30
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Ho MWY, Yang X, Carew MA, Zhang T, Hua L, Kwon YU, Chung SK, Adelt S, Vogel G, Riley AM, Potter BVL, Shears SB. Regulation of Ins(3,4,5,6)P(4) signaling by a reversible kinase/phosphatase. Curr Biol 2002; 12:477-82. [PMID: 11909533 DOI: 10.1016/s0960-9822(02)00713-3] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Regulation of Cl(-) channel conductance by Ins(3,4,5,6)P(4) provides receptor-dependent control over salt and fluid secretion, cell volume homeostasis, and electrical excitability of neurones and smooth muscle. Ignorance of how Ins(3,4,5,6)P(4) is synthesized has long hindered our understanding of this signaling pathway. We now show Ins(3,4,5,6)P(4) synthesis by Ins(1,3,4,5,6)P(5) 1-phosphatase activity by an enzyme previously characterized as an Ins(3,4,5,6)P(4) 1-kinase. Rationalization of these phenomena with a ligand binding model unveils Ins(1,3,4)P(3) as not simply an alternative kinase substrate, but also an activator of Ins(1,3,4,5,6)P(5) 1-phosphatase. Stable overexpression of the enzyme in epithelial monolayers verifies its physiological role in elevating Ins(3,4,5,6)P(4) levels and inhibiting secretion. It is exceptional for a single enzyme to catalyze two opposing signaling reactions (1-kinase/1-phosphatase) under physiological conditions. Reciprocal coordination of these opposing reactions offers an alternative to general doctrine that intracellular signals are regulated by integrating multiple, distinct phosphatases and kinases.
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Affiliation(s)
- Melisa W Y Ho
- Inositide Signaling Group, Laboratory of Signal Transduction and National Institute of Environmental Health Sciences, Research Triangle Park, NC 27709, USA
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31
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Adelt S, Plettenburg O, Dallmann G, Ritter FP, Shears SB, Altenbach HJ, Vogel G. Regiospecific phosphohydrolases from Dictyostelium as tools for the chemoenzymatic synthesis of the enantiomers D-myo-inositol 1,2,4-trisphosphate and D-myo-inositol 2,3,6-trisphosphate: non-physiological, potential analogues of biologically active D-myo-inositol 1,3,4-trisphosphate. Bioorg Med Chem Lett 2001; 11:2705-8. [PMID: 11591506 DOI: 10.1016/s0960-894x(01)00536-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
A new de novo synthesis of the enantiomeric pair D-myo-inositol 1,2,4-trisphosphate and D-myo-inositol 2,3,6-trisphosphate is described. Starting from enantiopure dibromocyclohexenediol, several C2 symmetrical building blocks were synthesized which gave access to D-myo-inositol 1,2,4,5-tetrakisphosphate and D-myo-inositol 1,2,3,6-tetrakisphosphate. Exploiting the high regiospecificity of two partially purified phosphohydrolases from Dictyostelium, a 5-phosphatase and a phytase, the inositol tetrakisphosphates were converted enzymatically to the target compounds. Their potential to modulate the activity of Ins3,4,5,6P4 1-kinase was investigated and compared with the effects of D-myo-inositol 1,3,4-trisphosphate.
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Affiliation(s)
- S Adelt
- Institute für Biochemie und Organische Chemie, Bergische Universität Wuppertal, Gaussstrasse 20, 42097, Wuppertal, FRG
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32
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Liu C, Riley AM, Yang X, Shears SB, Potter BV. Synthesis and biological activity of D- and L-chiro-inositol 2,3,4,5-tetrakisphosphate: design of a novel and potent inhibitor of Ins(3,4,5,6)P4 1-kinase/Ins(1,3,4)P3 5/6-kinase. J Med Chem 2001; 44:2984-9. [PMID: 11520207 DOI: 10.1021/jm000553k] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The synthesis of a novel and potent Ins(3,4,5,6)P4 1-kinase/Ins(1,3,4)P3 5/6 kinase inhibitor and its enantiomer is described. D-chiro-Inositol 2,3,4,5-tetrakisphosphate [D-chiro-Ins(2,3,4,5)P4, 3, Figure 1] and L-chiro-inositol 2,3,4,5-tetrakisphosphate [L-chiro-Ins(2,3,4,5)P4, ent-3] were synthesized from D-1,6-di-O-benzyl-chiro-inositol and L-1,6-di-O-benzyl-chiro-inositol, respectively. We examined inhibition of the multifunctional Ins(3,4,5,6)P4 1-kinase/Ins(1,3,4)P3 5/6-kinase from bovine aorta by 3 and ent-3. Compound 3 was a potent inhibitor with an IC(50) of 1.5 microM, and ent-3 was more than 20-fold less active. The results are compared to those for other inhibitory inositol polyphosphates with structure-activity relationship discussion. Compound 3 is a useful lead for development of further inhibitors of this important enzyme, and ent-3 should find applications in the newly emerging Ins(1,4,5,6)P4 signaling pathway.
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Affiliation(s)
- C Liu
- Wolfson Laboratory of Medicinal Chemistry, Department of Pharmacy and Pharmacology, University of Bath, Claverton Down, Bath BA2 7AY, UK
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33
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Blum-Held C, Bernard P, Schlewer G, Spiess B. myo-Inositol 1,4,5,6-tetrakisphosphate and myo-inositol 3,4,5,6-tetrakisphosphate, two second messengers that may act as pH-dependent molecular switches. J Am Chem Soc 2001; 123:3399-400. [PMID: 11457089 DOI: 10.1021/ja015616i] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- C Blum-Held
- Laboratoire de Pharmacologie Moléculaire UMR 7081 du CNRS-ULP, Faculté de Pharmacie 74, Route du Rhin, B.P. 24, 67401 Illkirch Cedex, France
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34
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De novo synthesis of the enantiomers Ins(1,2,3,4)P4 and Ins(1,2,3,6)P4—regiospecificity of their enzymatic dephosphorylation. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s0957-4166(00)00063-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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35
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Block O, Klein G, Altenbach HJ, Brauer DJ. New stereoselective route to the epoxyquinol core of manumycin-type natural products. Synthesis of enantiopure (+)-bromoxone, (-)-LL-C10037 alpha, and (+)-KT 8110. J Org Chem 2000; 65:716-21. [PMID: 10814002 DOI: 10.1021/jo991324c] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A practical route is decribed for the preparation of the C(7)N core of manumycin-type compounds. Starting from p-benzoquinone, optically pure compounds in both forms can be prepared via enzymatic resolution of a derived diacetoxy conduritol. A diepoxy aminoinositol is accessible which can function for formation of enantiopure epoxyquinones and quinols. Examples are given for acylation reactions of this amine with several acyl derivatives. With this approach (-)-LL-C10037alpha and quinones such as (+)-KT-8110 with 5R,6S-configuration can be synthesized through oxidation. In addition a short route to (+)-bromoxone is described. Most steps include simple epoxide formation and cleavage reactions which all can be carried out in a high stereoselective manner.
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Affiliation(s)
- O Block
- Fachbereich Chemie, Bergische Universität-Gesamthochschule Wuppertal, Gauss-trasse 20, D-42097 Wuppertal, Germany
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