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Méndez Y, Vasco AV, Ebensen T, Schulze K, Yousefi M, Davari MD, Wessjohann LA, Guzmán CA, Rivera DG, Westermann B. Diversification of a Novel α-Galactosyl Ceramide Hotspot Boosts the Adjuvant Properties in Parenteral and Mucosal Vaccines. Angew Chem Int Ed Engl 2024; 63:e202310983. [PMID: 37857582 DOI: 10.1002/anie.202310983] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 10/17/2023] [Accepted: 10/18/2023] [Indexed: 10/21/2023]
Abstract
The development of potent adjuvants is an important step for improving the performance of subunit vaccines. CD1d agonists, such as the prototypical α-galactosyl ceramide (α-GalCer), are of special interest due to their ability to activate iNKT cells and trigger rapid dendritic cell maturation and B-cell activation. Herein, we introduce a novel derivatization hotspot at the α-GalCer skeleton, namely the N-substituent at the amide bond. The multicomponent diversification of this previously unexplored glycolipid chemotype space permitted the introduction of a variety of extra functionalities that can either potentiate the adjuvant properties or serve as handles for further conjugation to antigens toward the development of self-adjuvanting vaccines. This strategy led to the discovery of compounds eliciting enhanced antigen-specific T cell stimulation and a higher antibody response when delivered by either the parenteral or the mucosal route, as compared to a known potent CD1d agonist. Notably, various functionalized α-GalCer analogues showed a more potent adjuvant effect after intranasal immunization than a PEGylated α-GalCer analogue previously optimized for this purpose. Ultimately, this work could open multiple avenues of opportunity for the use of mucosal vaccines against microbial infections.
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Affiliation(s)
- Yanira Méndez
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
- Laboratory of Synthetic and Biomolecular Chemistry, Faculty of Chemistry, University of Havana, Zapata & G, Havana, 10400, Cuba
| | - Aldrin V Vasco
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
| | - Thomas Ebensen
- Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Kai Schulze
- Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Mohammad Yousefi
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
| | - Mehdi D Davari
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
| | - Carlos A Guzmán
- Helmholtz Centre for Infection Research, Inhoffenstraße 7, 38124, Braunschweig, Germany
| | - Daniel G Rivera
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
- Laboratory of Synthetic and Biomolecular Chemistry, Faculty of Chemistry, University of Havana, Zapata & G, Havana, 10400, Cuba
- Finlay Institute of Vaccines, 200 and 21 Street, Havana, 11600, Cuba
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 6120 Halle, Saale), Germany
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Hussain H, Xiao J, Ali A, Green IR, Westermann B. Unusually cyclized triterpenoids: occurrence, biosynthesis and chemical synthesis. Nat Prod Rep 2023; 40:412-451. [PMID: 36458822 DOI: 10.1039/d2np00033d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Covering: 2009 to 2021Biosynthetically, most of the syntheses of triterpenes follow the cascade cyclization and rearrangement of the acyclic precursors viz., squalene (S) and 2,3-oxidosqualene (OS), which lead to the very well known tetra- and pentacyclic triterpene skeletons. Aside from these, numerous other triterpenoid molecules are also reported from various natural sources and their structures are derived from "S" and "OS" via some unusual cyclization operations which are different from the usual tetra- and pentacyclic frameworks. Numerous compelling advances have been made and reported in the identification of these unusual cyclized mono-, di-, tri- and tetracyclic triterpenes between 2009 and 2021. Besides a dramatic increase in the newly isolated uncommon cyclized triterpenoids, substantial progress in the (bio)-synthesis of these triterpenes has been published along with significant progress in their biological effects. In this review, 180 new unusual cyclized triterpenoids together with their demonstrated biogenetic pathways, syntheses and biological effects will be categorized and discussed.
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Affiliation(s)
- Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle (Saale) D-06120, Germany.
| | - Jianbo Xiao
- International Research Center for Food Nutrition and Safety, Jiangsu University, Zhenjiang 212013, China.,Department of Analytical Chemistry and Food Science, Faculty of Food Science and Technology, University of Vigo - Ourense Campus, Ourense, E-32004, Spain
| | - Akbar Ali
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Ivan R Green
- Department of Chemistry and Polymer Science, University of Stellenbosch, Private Bag X1, Matieland, Stellenbosch 7600, South Africa
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, Halle (Saale) D-06120, Germany.
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Westermann B, Lotze M, Varra L, Versteeg N, Domin M, Nicolet L, Obrist M, Klepzig K, Marbot L, Lämmler L, Fiedler K, Wattendorf E. When laughter arrests speech: fMRI-based evidence. Philos Trans R Soc Lond B Biol Sci 2022; 377:20210182. [PMID: 36126674 PMCID: PMC9489293 DOI: 10.1098/rstb.2021.0182] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Who has not experienced that sensation of losing the power of speech owing to an involuntary bout of laughter? An investigation of this phenomenon affords an insight into the neuronal processes that underlie laughter. In our functional magnetic resonance imaging study, participants were made to laugh by tickling in a first condition; in a second one they were requested to produce vocal utterances under the provocation of laughter by tickling. This investigation reveals increased neuronal activity in the sensorimotor cortex, the anterior cingulate gyrus, the insula, the nucleus accumbens, the hypothalamus and the periaqueductal grey for both conditions, thereby replicating the results of previous studies on ticklish laughter. However, further analysis indicates the activity in the emotion-associated regions to be lower when tickling is accompanied by voluntary vocalization. Here, a typical pattern of activation is identified, including the primary sensory cortex, a ventral area of the anterior insula and the ventral tegmental field, to which belongs to the nucleus ambiguus, namely, the common effector organ for voluntary and involuntary vocalizations. During the conflictual voluntary-vocalization versus laughter experience, the laughter-triggering network appears to rely heavily on a sensory and a deep interoceptive analysis, as well as on motor effectors in the brainstem. This article is part of the theme issue ‘Cracking the laugh code: laughter through the lens of biology, psychology and neuroscience’.
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Affiliation(s)
- B Westermann
- Department of Neurosurgery, University Hospital Basel, Basel, Switzerland
| | - M Lotze
- Faculty of Medicine, University of Greifswald, Greifswald, Germany
| | - L Varra
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - N Versteeg
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - M Domin
- Faculty of Medicine, University of Greifswald, Greifswald, Germany
| | - L Nicolet
- College of Health Sciences Fribourg, Fribourg, Switzerland
| | - M Obrist
- College of Health Sciences Fribourg, Fribourg, Switzerland
| | - K Klepzig
- College of Health Sciences Fribourg, Fribourg, Switzerland
| | - L Marbot
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - L Lämmler
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - K Fiedler
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland
| | - E Wattendorf
- Faculty of Science and Medicine, University of Fribourg, Fribourg, Switzerland.,College of Health Sciences Fribourg, Fribourg, Switzerland
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Humpierre AR, Zanuy A, Saenz M, Vasco AV, Méndez Y, Westermann B, Cardoso F, Quintero L, Santana D, Verez V, Valdés Y, Rivera DG, Garrido R. Quantitative NMR for the structural analysis of novel bivalent glycoconjugates as vaccine candidates. J Pharm Biomed Anal 2022; 214:114721. [DOI: 10.1016/j.jpba.2022.114721] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 02/17/2022] [Accepted: 03/08/2022] [Indexed: 10/18/2022]
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Lam YTH, Ricardo MG, Rennert R, Frolov A, Porzel A, Brandt W, Stark P, Westermann B, Arnold N. Rare Glutamic Acid Methyl Ester Peptaibols from Sepedonium ampullosporum Damon KSH 534 Exhibit Promising Antifungal and Anticancer Activity. Int J Mol Sci 2021; 22:ijms222312718. [PMID: 34884518 PMCID: PMC8657771 DOI: 10.3390/ijms222312718] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 11/17/2021] [Accepted: 11/23/2021] [Indexed: 01/29/2023] Open
Abstract
Fungal species of genus Sepedonium are rich sources of diverse secondary metabolites (e.g., alkaloids, peptaibols), which exhibit variable biological activities. Herein, two new peptaibols, named ampullosporin F (1) and ampullosporin G (2), together with five known compounds, ampullosporin A (3), peptaibolin (4), chrysosporide (5), c(Trp-Ser) (6) and c(Trp-Ala) (7), have been isolated from the culture of Sepedonium ampullosporum Damon strain KSH534. The structures of 1 and 2 were elucidated based on ESI-HRMSn experiments and intense 1D and 2D NMR analyses. The sequence of ampullosporin F (1) was determined to be Ac-Trp1-Ala2-Aib3-Aib4-Leu5-Aib6-Gln7-Aib8-Aib9-Aib10-GluOMe11-Leu12-Aib13-Gln14-Leuol15, while ampullosporin G (2) differs from 1 by exchanging the position of Gln7 with GluOMe11. Furthermore, the total synthesis of 1 and 2 was carried out on solid-phase to confirm the absolute configuration of all chiral amino acids as L. In addition, ampullosporin F (1) and G (2) showed significant antifungal activity against B. cinerea and P. infestans, but were inactive against S. tritici. Cell viability assays using human prostate (PC-3) and colorectal (HT-29) cancer cells confirmed potent anticancer activities of 1 and 2. Furthermore, a molecular docking study was performed in silico as an attempt to explain the structure-activity correlation of the characteristic ampullosporins (1–3).
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Affiliation(s)
- Yen T. H. Lam
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, Hanoi 100000, Vietnam
| | - Manuel G. Ricardo
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Biomolecular Systems, Max Planck Institute of Colloids and Interfaces, D-14476 Potsdam, Germany
| | - Robert Rennert
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Andrej Frolov
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Department of Biochemistry, Faculty of Biology, St. Petersburg State University, 199004 St. Petersburg, Russia
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Pauline Stark
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, D-06120 Halle (Saale), Germany; (Y.T.H.L.); (M.G.R.); (R.R.); (A.F.); (A.P.); (W.B.); (P.S.); (B.W.)
- Correspondence: ; Tel.: +49-345-5582-1310
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Mamadalieva NZ, Youssef FS, Hussain H, Zengin G, Mollica A, Al Musayeib NM, Ashour ML, Westermann B, Wessjohann LA. Validation of the Antioxidant and Enzyme Inhibitory Potential of Selected Triterpenes Using In Vitro and In Silico Studies, and the Evaluation of Their ADMET Properties. Molecules 2021; 26:molecules26216331. [PMID: 34770739 PMCID: PMC8587851 DOI: 10.3390/molecules26216331] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2021] [Revised: 10/11/2021] [Accepted: 10/13/2021] [Indexed: 12/13/2022] Open
Abstract
The antioxidant and enzyme inhibitory potential of fifteen cycloartane-type triterpenes’ potentials were investigated using different assays. In the phosphomolybdenum method, cycloalpioside D (6) (4.05 mmol TEs/g) showed the highest activity. In 1,1-diphenyl-2-picrylhydrazyl (DPPH*) radical and 2,2′-azino-bis(3-ethylbenzothiazoline)-6-sulfonic acid (ABTS) cation radical scavenging assays, cycloorbicoside A-7-monoacetate (2) (5.03 mg TE/g) and cycloorbicoside B (10) (10.60 mg TE/g) displayed the highest activities, respectively. Oleanolic acid (14) (51.45 mg TE/g) and 3-O-β-d-xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol 7-monoacetate (4) (13.25 mg TE/g) revealed the highest reducing power in cupric ion-reducing activity (CUPRAC) and ferric-reducing antioxidant power (FRAP) assays, respectively. In metal-chelating activity on ferrous ions, compound 2 displayed the highest activity estimated by 41.00 mg EDTAE/g (EDTA equivalents/g). The tested triterpenes showed promising AChE and BChE inhibitory potential with 3-O-β-d-xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol 2′,3′,4′,7-tetraacetate (3), exhibiting the highest inhibitory activity as estimated from 5.64 and 5.19 mg GALAE/g (galantamine equivalent/g), respectively. Compound 2 displayed the most potent tyrosinase inhibitory activity (113.24 mg KAE/g (mg kojic acid equivalent/g)). Regarding α-amylase and α-glucosidase inhibition, 3-O-β-d-xylopyranoside-(23R,24S)-16β,23;16α,24-diepoxycycloart-25(26)-en-3β,7β-diol (5) (0.55 mmol ACAE/g) and compound 3 (25.18 mmol ACAE/g) exerted the highest activities, respectively. In silico studies focused on compounds 2, 6, and 7 as inhibitors of tyrosinase revealed that compound 2 displayed a good ranking score (−7.069 kcal/mole) and also that the ΔG free-binding energy was the highest among the three selected compounds. From the ADMET/TOPKAT prediction, it can be concluded that compounds 4 and 5 displayed the best pharmacokinetic and pharmacodynamic behavior, with considerable activity in most of the examined assays.
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Affiliation(s)
- Nilufar Z. Mamadalieva
- Institute of the Chemistry of Plant Substances, Academy Sciences of Uzbekistan, Tashkent 100170, Uzbekistan
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; (H.H.); (B.W.); (L.A.W.)
- Correspondence:
| | - Fadia S. Youssef
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt; (F.S.Y.); (M.L.A.)
| | - Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; (H.H.); (B.W.); (L.A.W.)
| | - Gokhan Zengin
- Department of Biology, Science Faculty, Selcuk University, Konya 42130, Turkey;
| | - Adriano Mollica
- Department of Pharmacy, University “G. d’Annunzio” of Chieti-Pescara, 66100 Chieti, Italy;
| | - Nawal M. Al Musayeib
- Department of Pharmacognosy, College of Pharmacy, King Saud University, Riyadh 11495, Saudi Arabia;
| | - Mohamed L. Ashour
- Department of Pharmacognosy, Faculty of Pharmacy, Ain Shams University, Cairo 11566, Egypt; (F.S.Y.); (M.L.A.)
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; (H.H.); (B.W.); (L.A.W.)
| | - Ludger A. Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany; (H.H.); (B.W.); (L.A.W.)
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Hussain H, Ali I, Wang D, Hakkim FL, Westermann B, Ahmed I, Ashour AM, Khan A, Hussain A, Green IR, Shah STA. Glycyrrhetinic acid: a promising scaffold for the discovery of anticancer agents. Expert Opin Drug Discov 2021; 16:1497-1516. [PMID: 34294017 DOI: 10.1080/17460441.2021.1956901] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [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: 01/18/2023]
Abstract
INTRODUCTION Oleanane-type pentacyclic triterpenes named glycyrrhetinic acids (GAs) featuring a C-30 carboxylic acid group, are extracted from the licorice (Glycyrrhiza uralensis). Numerous biological properties of GA have been reported and have attracted researchers from all over the world in recent years due to the peculiar GA scaffold-based semisynthetic cytotoxic effects. AREAS COVERED This review represents the applications of semisynthetic derivatives of GA for the development of future cancer treatments. Included in the review are important structural features of the semisynthetic GAs crucial for cytotoxic effects. EXPERT OPINION Numerous semisynthetic GA derivatives illustrated excellent cytotoxic effects toward various cancer cells. Notably the C-3(OH) at ring A along with C30-CO2H at ring E as vital structural features, make GA very appealing as a lead scaffold for medicinal chemistry, since these two groups permit the creation of further chemical diversity geared toward improved cytotoxic effects. Furthermore, numerous GA derivatives have been synthesized and indicate that compounds featuring cyanoenone moieties in ring A, or compounds having the amino group or nitrogen comprising heterocycles and hybrids thereof, illustrate more potent cytotoxicity. Furthermore, GA has a great capability to be conjugated with other anticancer molecules to synergistically enhance their combined cytotoxicity.
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Affiliation(s)
- Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | - Iftikhar Ali
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Department of Chemistry, Karakoram International University, Gilgit, Pakistan
| | - Daijie Wang
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | | | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | - Ishtiaq Ahmed
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Ahmed M Ashour
- Department of Pharmacology and Toxicology, College of Pharmacy, Umm Al-Qura University, Makkah, Saudi Arabia
| | - Amjad Khan
- Department of Pharmacy, Quaid-i-Azam University, Islamabad, Pakistan
| | - Amjad Hussain
- Department of Chemistry, University of Okara, Okara, Pakistan
| | - Ivan R Green
- Department of Chemistry and Polymer Science, University of Stellenbosch, Matieland, South Africa
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Ditfe T, Bette E, N. Sultani H, Otto A, Wessjohann LA, Arnold N, Westermann B. Synthesis and Biological Evaluation of Highly Potent Fungicidal
Deoxy
‐Hygrophorones. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100729] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Toni Ditfe
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
| | - Eileen Bette
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
| | - Haider N. Sultani
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
| | - Alexander Otto
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
| | - Ludger A. Wessjohann
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
- Institute of Organic Chemistry Faculty of Natural Sciences II Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Str. 2 06120 Halle (Saale) Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry Leibniz-Institute of Plant Biochemistry Weinberg 3 06120 Halle (Saale) Germany
- Institute of Organic Chemistry Faculty of Natural Sciences II Martin-Luther-University Halle-Wittenberg Kurt-Mothes-Str. 2 06120 Halle (Saale) Germany
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Sultani HN, Morgan I, Hussain H, Roos AH, Haeri HH, Kaluđerović GN, Hinderberger D, Westermann B. Access to New Cytotoxic Triterpene and Steroidal Acid-TEMPO Conjugates by Ugi Multicomponent-Reactions. Int J Mol Sci 2021; 22:ijms22137125. [PMID: 34281176 PMCID: PMC8268079 DOI: 10.3390/ijms22137125] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 06/23/2021] [Accepted: 06/25/2021] [Indexed: 11/30/2022] Open
Abstract
Multicomponent reactions, especially the Ugi-four component reaction (U-4CR), provide powerful protocols to efficiently access compounds having potent biological and pharmacological effects. Thus, a diverse library of betulinic acid (BA), fusidic acid (FA), cholic acid (CA) conjugates with TEMPO (nitroxide) have been prepared using this approach, which also makes them applicable in electron paramagnetic resonance (EPR) spectroscopy. Moreover, convertible amide modified spin-labelled fusidic acid derivatives were selected for post-Ugi modification utilizing a wide range of reaction conditions which kept the paramagnetic center intact. The nitroxide labelled betulinic acid analogue 6 possesses cytotoxic effects towards two investigated cell lines: prostate cancer PC3 (IC50 7.4 ± 0.7 μM) and colon cancer HT29 (IC50 9.0 ± 0.4 μM). Notably, spin-labelled fusidic acid derivative 8 acts strongly against these two cancer cell lines (PC3: IC50 6.0 ± 1.1 μM; HT29: IC50 7.4 ± 0.6 μM). Additionally, another fusidic acid analogue 9 was also found to be active towards HT29 with IC50 7.0 ± 0.3 μM (CV). Studies on the mode of action revealed that compound 8 increased the level of caspase-3 significantly which clearly indicates induction of apoptosis by activation of the caspase pathway. Furthermore, the exclusive mitochondria targeting of compound 18 was successfully achieved, since mitochondria are the major source of ROS generation.
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Affiliation(s)
- Haider N. Sultani
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany; (H.N.S.); (I.M.); (H.H.); (G.N.K.)
| | - Ibrahim Morgan
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany; (H.N.S.); (I.M.); (H.H.); (G.N.K.)
| | - Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany; (H.N.S.); (I.M.); (H.H.); (G.N.K.)
| | - Andreas H. Roos
- Physical Chemistry—Complex Self-Organizing Systems, Institute of Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, 06120 Halle, Germany; (A.H.R.); (H.H.H.); (D.H.)
| | - Haleh H. Haeri
- Physical Chemistry—Complex Self-Organizing Systems, Institute of Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, 06120 Halle, Germany; (A.H.R.); (H.H.H.); (D.H.)
| | - Goran N. Kaluđerović
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany; (H.N.S.); (I.M.); (H.H.); (G.N.K.)
- Department of Engineering and Natural Sciences, University of Applied Sciences Merseburg, Eberhard-Leibnitz-Strasse 2, 06217 Merseburg, Germany
| | - Dariush Hinderberger
- Physical Chemistry—Complex Self-Organizing Systems, Institute of Chemistry, Martin Luther University Halle-Wittenberg, von-Danckelmann-Platz 4, 06120 Halle, Germany; (A.H.R.); (H.H.H.); (D.H.)
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany; (H.N.S.); (I.M.); (H.H.); (G.N.K.)
- Organic Chemistry, Institute of Chemistry, Martin-Luther University Halle-Wittenberg, Kurt-Mothes-Strasse 2, 06120 Halle, Germany
- Correspondence: ; Tel.: +49-345-5582-1340; Fax: +49-345-5582-1309
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10
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Ricardo MG, Schwark M, Llanes D, Niedermeyer THJ, Westermann B. Total Synthesis of Aetokthonotoxin, the Cyanobacterial Neurotoxin Causing Vacuolar Myelinopathy. Chemistry 2021; 27:12032-12035. [PMID: 34081364 PMCID: PMC8453946 DOI: 10.1002/chem.202101848] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2021] [Indexed: 12/02/2022]
Abstract
Aetokthonotoxin has recently been identified as the cyanobacterial neurotoxin causing Vacuolar Myelinopathy, a fatal neurologic disease, spreading through a trophic cascade and affecting birds of prey such as the bald eagle in the USA. Here, we describe the total synthesis of this specialized metabolite. The complex, highly brominated 1,2’‐biindole could be synthesized via a Somei‐type Michael reaction as key step. The optimised sequence yielded the natural product in five steps with an overall yield of 29 %.
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Affiliation(s)
- Manuel G Ricardo
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany.,present address: Department of Biomolecular Systems, Max-Planck Institute of Colloids and Interfaces, Am Mühlenberg 1, 14476, Potsdam, Germany
| | - Markus Schwark
- Department of Pharmaceutical Biology, Martin-Luther-University Halle-Wittenberg, Institute of Pharmacy/Pharmacognosy, Hoher Weg 8, 06120, Halle, Germany
| | - Dayma Llanes
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | - Timo H J Niedermeyer
- Department of Pharmaceutical Biology, Martin-Luther-University Halle-Wittenberg, Institute of Pharmacy/Pharmacognosy, Hoher Weg 8, 06120, Halle, Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
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11
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Püllmann P, Knorrscheidt A, Münch J, Palme PR, Hoehenwarter W, Marillonnet S, Alcalde M, Westermann B, Weissenborn MJ. A modular two yeast species secretion system for the production and preparative application of unspecific peroxygenases. Commun Biol 2021; 4:562. [PMID: 33980981 PMCID: PMC8115255 DOI: 10.1038/s42003-021-02076-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Accepted: 03/31/2021] [Indexed: 01/27/2023] Open
Abstract
Fungal unspecific peroxygenases (UPOs) represent an enzyme class catalysing versatile oxyfunctionalisation reactions on a broad substrate scope. They are occurring as secreted, glycosylated proteins bearing a haem-thiolate active site and rely on hydrogen peroxide as the oxygen source. However, their heterologous production in a fast-growing organism suitable for high throughput screening has only succeeded once-enabled by an intensive directed evolution campaign. We developed and applied a modular Golden Gate-based secretion system, allowing the first production of four active UPOs in yeast, their one-step purification and application in an enantioselective conversion on a preparative scale. The Golden Gate setup was designed to be universally applicable and consists of the three module types: i) signal peptides for secretion, ii) UPO genes, and iii) protein tags for purification and split-GFP detection. The modular episomal system is suitable for use in Saccharomyces cerevisiae and was transferred to episomal and chromosomally integrated expression cassettes in Pichia pastoris. Shake flask productions in Pichia pastoris yielded up to 24 mg/L secreted UPO enzyme, which was employed for the preparative scale conversion of a phenethylamine derivative reaching 98.6 % ee. Our results demonstrate a rapid, modular yeast secretion workflow of UPOs yielding preparative scale enantioselective biotransformations.
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Affiliation(s)
- Pascal Püllmann
- Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | | | - Judith Münch
- Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | - Paul R Palme
- Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
| | | | | | - Miguel Alcalde
- Department of Biocatalysis, Institute of Catalysis, CSIC, Madrid, Spain
| | - Bernhard Westermann
- Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany
- Institute of Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Martin J Weissenborn
- Leibniz Institute of Plant Biochemistry, Halle (Saale), Germany.
- Institute of Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany.
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12
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Hussain H, Ali I, Wang D, Hakkim FL, Westermann B, Rashan L, Ahmed I, Green IR. Boswellic acids: privileged structures to develop lead compounds for anticancer drug discovery. Expert Opin Drug Discov 2021; 16:851-867. [PMID: 33650441 DOI: 10.1080/17460441.2021.1892640] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 01/11/2023]
Abstract
Introduction: Cancer has been identified to be the second major cause of death internationally as exemplified by ca. 9.6 million deaths in 2018 along with ca. 18 million new patients in 2018 that have been recorded. Natural boswellic acids (BAs) and their source, frankincense, have been reported to possess in vitro and in vivo anticancer effects toward various cancer cells.Areas covered: This comprehensive review focuses on the importance of boswellic acids (BAs) for the establishment of future treatments of cancer. Moreover, potent semisynthetic derivatives of BAs have been described along with their mode of action. In addition, important structural features of the semisynthetic BAs required for cytotoxic effects are also discussed.Expert opinion: Numerous semisynthetic BAs illustrate excellent cytotoxic effects. Of note, compounds bearing cyanoenone moieties in ring A, endoperoxides and hybrids display increased and more potent cytotoxic effects compared with other semisynthetic BAs. Moreover, BAs have the potential to conjugate or couple with other anticancer compounds to synergistically increase their combined anticancer effects. In addition, to get derived BAs to become lead anticancer compounds, future research should focus on the preparation of ring A cyanoenones, endoperoxides, and C-24 amide analogs.
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Affiliation(s)
- Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg, Germany
| | - Iftikhar Ali
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.,Department of Chemistry, Karakoram International University, Gilgit, Pakistan
| | - Daijie Wang
- School of Pharmaceutical Sciences and Key Laboratory for Applied Technology of Sophisticated Analytical Instruments of Shandong Province, Shandong Analysis and Test Center, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China
| | - Faruck L Hakkim
- Department of Urology Masonic Cancer Center, University of Minnesota (Twin Cities), Minneapolis, USA
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg, Germany
| | - Luay Rashan
- Medicinal Plants Division, Research Center, Dhofar University, Salalah, Oman
| | - Ishtiaq Ahmed
- Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, UK
| | - Ivan R Green
- Department of Chemistry and Polymer Science, University of Stellenbosch, Stellenbosch, South Africa
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13
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Méndez Y, Vasco AV, Humpierre AR, Westermann B. Isonitriles: Versatile Handles for the Bioorthogonal Functionalization of Proteins. ACS Omega 2020; 5:25505-25510. [PMID: 33073077 PMCID: PMC7557220 DOI: 10.1021/acsomega.0c03728] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 09/17/2020] [Indexed: 05/12/2023]
Abstract
The property of the isonitrile group to enable the simultaneous α-addition of a strong electrophile and a nucleophile has always attracted the attention of organic chemists. Its versatility is augmented when recognizing that its high structural compactness, the inertia to most of the naturally occurring functional groups, and relatively prolonged physiological and metabolical stability, convert it into the smallest bioorthogonal group. The discovery and optimization of the isonitrile-tetrazine [4+1] cycloaddition as an alternative tool for the development of ligation and decaging strategies and the recently reported reaction of isonitriles with chlorooximes bring new opportunities for the utilization of this functional group in biological systems. Although several approaches have been reported for the synthesis of isonitrile-modified carbohydrates and polysaccharides, its incorporation in proteins has been barely explored. Besides compiling the reported methods for the assembly of isonitrile-modified proteins, this Mini-Review aims at calling attention to the real potential of this modification for protein ligation, decaging, immobilization, imaging, and many other applications at a low structural and functional cost.
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Affiliation(s)
- Yanira Méndez
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
| | - Aldrin V. Vasco
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
| | - Ana R. Humpierre
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
- Center
for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba
| | - Bernhard Westermann
- Department
of Bioorganic Chemistry, Leibniz-Institute
of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
- Institute
of Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, 06120 Halle, Germany
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14
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Humpierre AR, Zanuy A, Saenz M, Garrido R, Vasco AV, Pérez-Nicado R, Soroa-Milán Y, Santana-Mederos D, Westermann B, Vérez-Bencomo V, Méndez Y, García-Rivera D, Rivera DG. Expanding the Scope of Ugi Multicomponent Bioconjugation to Produce Pneumococcal Multivalent Glycoconjugates as Vaccine Candidates. Bioconjug Chem 2020; 31:2231-2240. [PMID: 32809806 DOI: 10.1021/acs.bioconjchem.0c00423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Conjugate vaccines against encapsulated pathogens like Streptococcus pneumoniae face many challenges, including the existence of multiple serotypes with a diverse global distribution that constantly requires new formulations and higher coverage. Multivalency is usually achieved by combining capsular polysaccharide-protein conjugates from invasive serotypes, and for S. pneumoniae, this has evolved from 7- up to 20-valent vaccines. These glycoconjugate formulations often contain high concentrations of carrier proteins, which may negatively affect glycoconjugate immune response. This work broadens the scope of an efficient multicomponent strategy, leading to multivalent pneumococcal glycoconjugates assembled in a single synthetic operation. The bioconjugation method, based on the Ugi four-component reaction, enables the one-pot incorporation of two different polysaccharide antigens to a tetanus toxoid carrier, thus representing the fastest approach to achieve multivalency. The reported glycoconjugates incorporate three combinations of capsular polysaccharides 1, 6B, 14, and 18C from S. pneumoniae. The glycoconjugates were able to elicit functional specific antibodies against pneumococcal strains comparable to those shown by mixtures of the two monovalent glycoconjugates.
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Affiliation(s)
- Ana R Humpierre
- Finlay Institute of Vaccines, Ave 27 # 19805, Havana 10600, Cuba.,Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba.,Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | - Abel Zanuy
- Finlay Institute of Vaccines, Ave 27 # 19805, Havana 10600, Cuba
| | - Mirelys Saenz
- Finlay Institute of Vaccines, Ave 27 # 19805, Havana 10600, Cuba.,Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba
| | - Raine Garrido
- Finlay Institute of Vaccines, Ave 27 # 19805, Havana 10600, Cuba
| | - Aldrin V Vasco
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | | | | | | | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | | | - Yanira Méndez
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba.,Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | | | - Daniel G Rivera
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, Havana 10400, Cuba.,Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
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15
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Schnabel A, Cotinguiba F, Athmer B, Yang C, Westermann B, Schaks A, Porzel A, Brandt W, Schumacher F, Vogt T. A piperic acid CoA ligase produces a putative precursor of piperine, the pungent principle from black pepper fruits. Plant J 2020; 102:569-581. [PMID: 31837062 DOI: 10.1111/tpj.14652] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Revised: 10/30/2019] [Accepted: 11/05/2019] [Indexed: 06/10/2023]
Abstract
Black pepper (Piper nigrum L.) is known for its high content of piperine, a cinnamoyl amide derivative regarded as largely responsible for the pungent taste of this widely used spice. Despite its long history and worldwide use, the biosynthesis of piperine and related amides has been enigmatic up to now. In this report we describe a specific piperic acid CoA ligase from immature green fruits of P. nigrum. The corresponding enzyme was cloned and functionally expressed in E. coli. The recombinant enzyme displays a high specificity for piperic acid and does not accept the structurally related feruperic acid characterized by a similar C-2 extension of the general C6-C3 phenylpropanoid structure. The enzyme is also inactive with the standard set of hydroxycinnamic acids tested including caffeic acid, 4-coumaric acid, ferulic acid, and sinapic acid. Substrate specificity is corroborated by in silico modelling that suggests a perfect fit for the substrate piperic acid to the active site of the piperic acid CoA ligase. The CoA ligase gene shows its highest expression levels in immature green fruits, is also expressed in leaves and flowers, but not in roots. Virus-induced gene silencing provided some preliminary indications that the production of piperoyl-CoA is required for the biosynthesis of piperine in black pepper fruits.
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Affiliation(s)
- Arianne Schnabel
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Fernando Cotinguiba
- Instituto de Pesquisas de Produtos Naturais (IPPN), Universidade Federal do Rio de Janeiro (UFRJ), Avenida Carlos Chagas Filho, 373, 21941-902, Rio de Janeiro/RJ, Brasil
| | - Benedikt Athmer
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Changqing Yang
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Angela Schaks
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
| | - Frank Schumacher
- Core Facility Vienna Botanical Gardens, Rennweg 14/2, 1030, Vienna, Austria
| | - Thomas Vogt
- Department of Cell and Metabolic Biology, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120, Halle, Germany
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16
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Guerra T, Schilling S, Hake K, Gorzolka K, Sylvester FP, Conrads B, Westermann B, Romeis T. Calcium-dependent protein kinase 5 links calcium signaling with N-hydroxy-l-pipecolic acid- and SARD1-dependent immune memory in systemic acquired resistance. New Phytol 2020; 225:310-325. [PMID: 31469917 DOI: 10.1111/nph.16147] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Accepted: 08/14/2019] [Indexed: 05/20/2023]
Abstract
Systemic acquired resistance (SAR) prepares infected plants for faster and stronger defense activation upon subsequent attacks. SAR requires an information relay from primary infection to distal tissue and the initiation and maintenance of a self-maintaining phytohormone salicylic acid (SA)-defense loop. In spatial and temporal resolution, we show that calcium-dependent protein kinase CPK5 contributes to immunity and SAR. In local basal resistance, CPK5 functions upstream of SA synthesis, perception, and signaling. In systemic tissue, CPK5 signaling leads to accumulation of SAR-inducing metabolite N-hydroxy-L-pipecolic acid (NHP) and SAR marker genes, including Systemic Acquired Resistance Deficient 1 (SARD1) Plants of increased CPK5, but not CPK6, signaling display an 'enhanced SAR' phenotype towards a secondary bacterial infection. In the sard1-1 background, CPK5-mediated basal resistance is still mounted, but NHP concentration is reduced and enhanced SAR is lost. The biochemical analysis estimated CPK5 half maximal kinase activity for calcium, K50 [Ca2+ ], to be c. 100 nM, close to the cytoplasmic resting level. This low threshold uniquely qualifies CPK5 to decode subtle changes in calcium, a prerequisite to signal relay and onset and maintenance of priming at later time points in distal tissue. Our data explain why CPK5 functions as a hub in basal and systemic plant immunity.
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Affiliation(s)
- Tiziana Guerra
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
| | - Silke Schilling
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
| | - Katharina Hake
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
| | - Karin Gorzolka
- Leibniz Institute of Plant Biochemistry, Halle (Saale), 06120, Germany
| | - Fabian-Philipp Sylvester
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
| | - Benjamin Conrads
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
| | | | - Tina Romeis
- Department of Plant Biochemistry, Dahlem Centre of Plant Sciences, Institute for Biology, Freie Universität Berlin, Berlin, 14195, Germany
- Leibniz Institute of Plant Biochemistry, Halle (Saale), 06120, Germany
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17
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Budragchaa T, Westermann B, Wessjohann LA. Multicomponent synthesis of α-acylamino and α-acyloxy amide derivatives of desmycosin and their activity against gram-negative bacteria. Bioorg Med Chem 2019; 27:3237-3247. [PMID: 31229422 DOI: 10.1016/j.bmc.2019.05.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Revised: 03/27/2019] [Accepted: 05/29/2019] [Indexed: 11/17/2022]
Abstract
Bacterial resistance to the existing drugs requires constant development of new antibiotics. Developing compounds active against gram-negative bacteria thereby is one of the more challenging tasks. Among the many approaches to develop successful antibacterials, medicinal chemistry driven evolution of existing successful antibiotics is considered to be the most effective one. Towards this end, the C-20 aldehyde moiety of desmycosin was modified into α-acylamino and α-acyloxy amide functionalities using isonitrile-based Ugi and Passerini reactions, aiming for enhanced antibacterial and physicochemical properties. The desired compounds were obtained in 45-93% yield under mild conditions. The antibacterial activity of the resulting conjugates was tested against gram-negative Aliivibrio fischeri. The antibiotic strength is mostly governed by the amine component introduced. Thus, methylamine derived desmycosin bis-amide 4 displayed an enhanced inhibition rate vs. desmycosin (99% vs. 83% at 1 µM). Derivatives with long acyclic or bulky amine and isocyanide Ugi components reduced potency, whereas carboxylic acid reagents with longer chain length afforded increased bioactivity. In Passerini 3-component products, the butyric ester amide 22 displayed a higher activity (90% at 1 µM) than the parent compound desmycosin (2).
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Affiliation(s)
- Tuvshinjargal Budragchaa
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Saale, Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Saale, Germany; Institute of Organic Chemistry, Faculty of Natural Sciences II, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, 06120 Halle, Germany
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Saale, Germany; Institute of Organic Chemistry, Faculty of Natural Sciences II, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Strasse 2, 06120 Halle, Germany.
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18
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Matern A, Böttcher C, Eschen-Lippold L, Westermann B, Smolka U, Döll S, Trempel F, Aryal B, Scheel D, Geisler M, Rosahl S. A substrate of the ABC transporter PEN3 stimulates bacterial flagellin (flg22)-induced callose deposition in Arabidopsis thaliana. J Biol Chem 2019; 294:6857-6870. [PMID: 30833326 DOI: 10.1074/jbc.ra119.007676] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/20/2019] [Indexed: 12/28/2022] Open
Abstract
Nonhost resistance of Arabidopsis thaliana against Phytophthora infestans, a filamentous eukaryotic microbe and the causal agent of potato late blight, is based on a multilayered defense system. Arabidopsis thaliana controls pathogen entry through the penetration-resistance genes PEN2 and PEN3, encoding an atypical myrosinase and an ABC transporter, respectively, required for synthesis and export of unknown indole compounds. To identify pathogen-elicited leaf surface metabolites and further unravel nonhost resistance in Arabidopsis, we performed untargeted metabolite profiling by incubating a P. infestans zoospore suspension on leaves of WT or pen3 mutant Arabidopsis plants. Among the plant-secreted metabolites, 4-methoxyindol-3-yl-methanol and S-(4-methoxy-indol-3-yl-methyl) cysteine were detected in spore suspensions recollected from WT plants, but at reduced levels from the pen3 mutant plants. In both whole-cell and microsome-based assays, 4-methoxyindol-3-yl-methanol was transported in a PEN3-dependent manner, suggesting that this compound is a PEN3 substrate. The syntheses of both compounds were dependent on functional PEN2 and phytochelatin synthase 1. None of these compounds inhibited mycelial growth of P. infestans in vitro Of note, exogenous application of 4-methoxyindol-3-yl methanol slightly elevated cytosolic Ca2+ levels and enhanced callose deposition in hydathodes of seedlings treated with a bacterial pathogen-associated molecular pattern (PAMP), flagellin (flg22). Loss of flg22-induced callose deposition in leaves of pen3 seedlings was partially reverted by the addition of 4-methoxyindol-3-yl methanol. In conclusion, we have identified a specific indole compound that is a substrate for PEN3 and contributes to the plant defense response against microbial pathogens.
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Affiliation(s)
- Andreas Matern
- From the Department of Stress and Developmental Biology and
| | | | | | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany and
| | - Ulrike Smolka
- From the Department of Stress and Developmental Biology and
| | - Stefanie Döll
- From the Department of Stress and Developmental Biology and
| | - Fabian Trempel
- From the Department of Stress and Developmental Biology and
| | - Bibek Aryal
- the Department of Biology, University of Fribourg, Chemin du Musée 10, CH-1700 Fribourg, Switzerland
| | - Dierk Scheel
- From the Department of Stress and Developmental Biology and
| | - Markus Geisler
- the Department of Biology, University of Fribourg, Chemin du Musée 10, CH-1700 Fribourg, Switzerland
| | - Sabine Rosahl
- From the Department of Stress and Developmental Biology and
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19
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Méndez Y, De Armas G, Pérez I, Rojas T, Valdés-Tresanco ME, Izquierdo M, Alonso Del Rivero M, Álvarez-Ginarte YM, Valiente PA, Soto C, de León L, Vasco AV, Scott WL, Westermann B, González-Bacerio J, Rivera DG. Discovery of potent and selective inhibitors of the Escherichia coli M1-aminopeptidase via multicomponent solid-phase synthesis of tetrazole-peptidomimetics. Eur J Med Chem 2018; 163:481-499. [PMID: 30544037 DOI: 10.1016/j.ejmech.2018.11.074] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2018] [Revised: 11/12/2018] [Accepted: 11/30/2018] [Indexed: 12/14/2022]
Abstract
The Escherichia coli neutral M1-aminopeptidase (ePepN) is a novel target identified for the development of antimicrobials. Here we describe a solid-phase multicomponent approach which enabled the discovery of potent ePepN inhibitors. The on-resin protocol, developed in the frame of the Distributed Drug Discovery (D3) program, comprises the implementation of parallel Ugi-azide four-component reactions with resin-bound amino acids, thus leading to the rapid preparation of a focused library of tetrazole-peptidomimetics (TPMs) suitable for biological screening. By dose-response studies, three compounds were identified as potent and selective ePepN inhibitors, as little inhibitory effect was exhibited for the porcine ortholog aminopeptidase. The study allowed for the identification of the key structural features required for a high ePepN inhibitory activity. The most potent and selective inhibitor (TPM 11) showed a non-competitive inhibition profile of ePepN. We predicted that both diastereomers of compound TPM 11 bind to a site distinct from that occupied by the substrate. Theoretical models suggested that TPM 11 has an alternative inhibition mechanism that doesn't involve Zn coordination. On the other hand, the activity landscape analysis provided a rationale for our findings. Of note, compound TMP 2 showed in vitro antibacterial activity against Escherichia coli. Furthermore, none of the three identified inhibitors is a potent haemolytic agent, and only two compounds showed moderate cytotoxic activity toward the murine myeloma P3X63Ag cells. These results point to promising compounds for the future development of rationally designed TPMs as antibacterial agents.
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Affiliation(s)
- Yanira Méndez
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba; Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | - German De Armas
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Idalia Pérez
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Tamara Rojas
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba
| | - Mario E Valdés-Tresanco
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Maikel Izquierdo
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Maday Alonso Del Rivero
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Yoanna María Álvarez-Ginarte
- Laboratory of Theoretical and Computational Chemistry, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba
| | - Pedro A Valiente
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba.
| | - Carmen Soto
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Lena de León
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba
| | - Aldrin V Vasco
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | - William L Scott
- Department of Chemistry and Chemical Biology, Indiana University Purdue University Indianapolis, Indianapolis, IN 46202, United States
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany
| | - Jorge González-Bacerio
- Center for Protein Studies, Faculty of Biology, University of Havana, 25 y J, 10400, La Habana, Cuba.
| | - Daniel G Rivera
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana, Cuba; Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120, Halle/Saale, Germany.
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20
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Michels B, Zwaka H, Bartels R, Lushchak O, Franke K, Endres T, Fendt M, Song I, Bakr M, Budragchaa T, Westermann B, Mishra D, Eschbach C, Schreyer S, Lingnau A, Vahl C, Hilker M, Menzel R, Kähne T, Leßmann V, Dityatev A, Wessjohann L, Gerber B. Memory enhancement by ferulic acid ester across species. Sci Adv 2018; 4:eaat6994. [PMID: 30417089 PMCID: PMC6224069 DOI: 10.1126/sciadv.aat6994] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 09/12/2018] [Indexed: 06/09/2023]
Abstract
Cognitive impairments can be devastating for quality of life, and thus, preventing or counteracting them is of great value. To this end, the present study exploits the potential of the plant Rhodiola rosea and identifies the constituent ferulic acid eicosyl ester [icosyl-(2E)-3-(4-hydroxy-3-methoxyphenyl)-prop-2-enoate (FAE-20)] as a memory enhancer. We show that food supplementation with dried root material from R. rosea dose-dependently improves odor-taste reward associative memory scores in larval Drosophila and prevents the age-related decline of this appetitive memory in adult flies. Task-relevant sensorimotor faculties remain unaltered. From a parallel approach, a list of candidate compounds has been derived, including R. rosea-derived FAE-20. Here, we show that both R. rosea-derived FAE-20 and synthetic FAE-20 are effective as memory enhancers in larval Drosophila. Synthetic FAE-20 also partially compensates for age-related memory decline in adult flies, as well as genetically induced early-onset loss of memory function in young flies. Furthermore, it increases excitability in mouse hippocampal CA1 neurons, leads to more stable context-shock aversive associative memory in young adult (3-month-old) mice, and increases memory scores in old (>2-year-old) mice. Given these effects, and given the utility of R. rosea-the plant from which we discovered FAE-20-as a memory enhancer, these results may hold potential for clinical applications.
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Affiliation(s)
- Birgit Michels
- Leibniz Institute for Neurobiology, Department Genetics of Learning and Memory, Magdeburg, Germany
| | - Hanna Zwaka
- Leibniz Institute for Neurobiology, Department Genetics of Learning and Memory, Magdeburg, Germany
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Ruth Bartels
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Oleh Lushchak
- Precarpathian National University, Department of Biochemistry, Ivano-Frankivsk, Ukraine
| | - Katrin Franke
- Leibniz Institute of Plant Biochemistry (IPB), Department of Bioorganic Chemistry, Halle (Saale), Germany
| | - Thomas Endres
- Otto von Guericke University, Medical Faculty, Magdeburg, Germany
| | - Markus Fendt
- Otto von Guericke University, Medical Faculty, Institute for Pharmacology and Toxicology, Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Otto von Guericke University, Magdeburg, Germany
| | - Inseon Song
- German Center for Neurodegenerative Diseases (DZNE), Molecular Neuroplasticity Group, Magdeburg, Germany
| | - May Bakr
- German Center for Neurodegenerative Diseases (DZNE), Molecular Neuroplasticity Group, Magdeburg, Germany
| | - Tuvshinjargal Budragchaa
- Leibniz Institute of Plant Biochemistry (IPB), Department of Bioorganic Chemistry, Halle (Saale), Germany
| | - Bernhard Westermann
- Leibniz Institute of Plant Biochemistry (IPB), Department of Bioorganic Chemistry, Halle (Saale), Germany
| | - Dushyant Mishra
- University of Würzburg, Biocenter Am Hubland, Department of Genetics and Neurobiology, Würzburg, Germany
| | - Claire Eschbach
- University of Würzburg, Biocenter Am Hubland, Department of Genetics and Neurobiology, Würzburg, Germany
| | | | - Annika Lingnau
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Caroline Vahl
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Marike Hilker
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Randolf Menzel
- Free University Berlin, Institute of Neurobiology, Berlin, Germany
| | - Thilo Kähne
- Otto von Guericke University, Institute of Experimental Internal Medicine, Magdeburg, Germany
| | - Volkmar Leßmann
- Otto von Guericke University, Medical Faculty, Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Otto von Guericke University, Magdeburg, Germany
| | - Alexander Dityatev
- Center for Behavioral Brain Sciences (CBBS), Otto von Guericke University, Magdeburg, Germany
- German Center for Neurodegenerative Diseases (DZNE), Molecular Neuroplasticity Group, Magdeburg, Germany
- Otto von Guericke University, Medical Faculty, Magdeburg, Germany
| | - Ludger Wessjohann
- Leibniz Institute of Plant Biochemistry (IPB), Department of Bioorganic Chemistry, Halle (Saale), Germany
| | - Bertram Gerber
- Leibniz Institute for Neurobiology, Department Genetics of Learning and Memory, Magdeburg, Germany
- Center for Behavioral Brain Sciences (CBBS), Otto von Guericke University, Magdeburg, Germany
- Otto von Guericke University, Institute of Biology, Magdeburg, Germany
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21
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Ravanello BB, Seixas N, Rodrigues OED, da Silva RS, Villetti MA, Frolov A, Rivera DG, Westermann B. Diversity Driven Decoration and Ligation of Fullerene by Ugi and Passerini Multicomponent Reactions. Chemistry 2018; 24:9788-9793. [DOI: 10.1002/chem.201802414] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Indexed: 12/30/2022]
Affiliation(s)
- Bruno B. Ravanello
- Department of Bioorganic Chemistry; Leibniz-Institute of Plant Biochemistry; Weinberg 3 06120 Halle Germany
| | - Nalin Seixas
- Department of Bioorganic Chemistry; Leibniz-Institute of Plant Biochemistry; Weinberg 3 06120 Halle Germany
| | - Oscar E. D. Rodrigues
- LabSelen-NanoBio-Departamento de Química; Universidade Federal de Santa Maria; CEP 97105-900 Santa Maria, Rio Grande do Sul Brazil
| | - Rafael S. da Silva
- LabSelen-NanoBio-Departamento de Química; Universidade Federal de Santa Maria; CEP 97105-900 Santa Maria, Rio Grande do Sul Brazil
| | - Marcos A. Villetti
- Spectroscopy and Polymers Laboratory (LEPOL); Department of Physics; Universidade Federal de Santa Maria; CEP 97105-900 Santa Maria, Rio Grande do Sul Brazil
| | - Andrej Frolov
- Department of Bioorganic Chemistry; Leibniz-Institute of Plant Biochemistry; Weinberg 3 06120 Halle Germany
| | - Daniel G. Rivera
- Department of Bioorganic Chemistry; Leibniz-Institute of Plant Biochemistry; Weinberg 3 06120 Halle Germany
- Center for Natural Products Research; Faculty of Chemistry; University of Havana; Havana 10400 Cuba
| | - Bernhard Westermann
- Department of Bioorganic Chemistry; Leibniz-Institute of Plant Biochemistry; Weinberg 3 06120 Halle Germany
- Institute of Chemistry; Martin-Luther-University Halle-Wittenberg; Kurt-Mothes-Str. 2 06120 Halle Germany
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22
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Mot AC, Prell E, Klecker M, Naumann C, Faden F, Westermann B, Dissmeyer N. Real-time detection of N-end rule-mediated ubiquitination via fluorescently labeled substrate probes. New Phytol 2018; 217:613-624. [PMID: 28277608 PMCID: PMC5763331 DOI: 10.1111/nph.14497] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Accepted: 01/26/2017] [Indexed: 05/18/2023]
Abstract
The N-end rule pathway has emerged as a major system for regulating protein functions by controlling their turnover in medical, animal and plant sciences as well as agriculture. Although novel functions and enzymes of the pathway have been discovered, the ubiquitination mechanism and substrate specificity of N-end rule pathway E3 ubiquitin ligases have remained elusive. Taking the first discovered bona fide plant N-end rule E3 ligase PROTEOLYSIS1 (PRT1) as a model, we used a novel tool to molecularly characterize polyubiquitination live, in real time. We gained mechanistic insights into PRT1 substrate preference and activation by monitoring live ubiquitination using a fluorescent chemical probe coupled to artificial substrate reporters. Ubiquitination was measured by rapid in-gel fluorescence scanning as well as in real time by fluorescence polarization. The enzymatic activity, substrate specificity, mechanisms and reaction optimization of PRT1-mediated ubiquitination were investigated ad hoc instantaneously and with significantly reduced reagent consumption. We demonstrated that PRT1 is indeed an E3 ligase, which has been hypothesized for over two decades. These results demonstrate that PRT1 has the potential to be involved in polyubiquitination of various substrates and therefore pave the way to understanding recently discovered phenotypes of prt1 mutants.
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Affiliation(s)
- Augustin C. Mot
- Independent Junior Research Group on Protein Recognition and DegradationLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
- ScienceCampus Halle – Plant‐based BioeconomyBetty‐Heimann‐Str. 3Halle (Saale)D‐06120Germany
| | - Erik Prell
- Department of Bioorganic ChemistryLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
| | - Maria Klecker
- Independent Junior Research Group on Protein Recognition and DegradationLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
- ScienceCampus Halle – Plant‐based BioeconomyBetty‐Heimann‐Str. 3Halle (Saale)D‐06120Germany
| | - Christin Naumann
- Independent Junior Research Group on Protein Recognition and DegradationLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
- ScienceCampus Halle – Plant‐based BioeconomyBetty‐Heimann‐Str. 3Halle (Saale)D‐06120Germany
| | - Frederik Faden
- Independent Junior Research Group on Protein Recognition and DegradationLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
- ScienceCampus Halle – Plant‐based BioeconomyBetty‐Heimann‐Str. 3Halle (Saale)D‐06120Germany
| | - Bernhard Westermann
- Department of Bioorganic ChemistryLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
| | - Nico Dissmeyer
- Independent Junior Research Group on Protein Recognition and DegradationLeibniz Institute of Plant Biochemistry (IPB)Weinberg 3Halle (Saale)D‐06120Germany
- ScienceCampus Halle – Plant‐based BioeconomyBetty‐Heimann‐Str. 3Halle (Saale)D‐06120Germany
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23
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F. de la Torre A, Ali A, Westermann B, Schmeda-Hirschmann G, Walter Pertino M. An efficient cyclization of lapachol to new benzo[h]chromene hybrid compounds: a stepwisevs.one-pot esterification-click (CuAAC) study. NEW J CHEM 2018. [DOI: 10.1039/c8nj03699c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Comparison of one-potvs.stepwise esterification of lapachol to obtain highly diversified heterocycles. Whereas the one-pot esterification leads to mono esterified lapachol, the tandem approach generated benzo[h]chromene.
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Affiliation(s)
- Alexander F. de la Torre
- Departamento de Química Orgánica
- Facultad de Ciencias Químicas
- Universidad de Concepción
- Concepción
- Chile
| | - Akbar Ali
- Department of Chemistry
- University of Sargodha
- Pakistan
| | - Bernhard Westermann
- Department of Bioorganic Chemistry
- Leibniz-Institute of Plant Biochemistry
- Halle
- Germany
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24
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Oleszkiewicz A, Meusel T, Güpfert M, Westermann B, Hummel T, Welge-Lüssen A. Olfactory deficits decrease the time resolution for trigeminal lateralization. Int J Psychophysiol 2017; 121:18-21. [PMID: 28918916 DOI: 10.1016/j.ijpsycho.2017.09.004] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2017] [Revised: 04/27/2017] [Accepted: 09/07/2017] [Indexed: 11/19/2022]
Abstract
OBJECTIVES To date the temporal resolution of the detection of almost simultaneously applied intranasal trigeminal stimuli is unknown. The aim of our study was to examine this temporal resolution in an/hyposmic subjects, who are known to have reduced trigeminal sensitivity and compare it with healthy controls. METHODS Participants were 20 posttraumatic an/hyposmic patients, and 23 healthy controls (matched with regard to sex and age). Olfactory function was tested psychophysically using the Sniffin´ Sticks test battery. Bilateral trigeminal stimulation was carried out using a birhinal high-precision olfactometer. The trigeminal stimulus used was CO₂ 60% v/v, the interstimulus interval ranged from 28 to 32s, stimulus duration was 200ms. Time-lags tested between right and left side of stimulation were at 40, 80, 120, 160 and 200ms. Subjects raised their left or right hand to indicate the side on which the stimulus had been perceived first. RESULTS In both groups the accuracy in the trigeminal lateralization task increased with the time-lag but normosmic subjects significantly outperformed an/hyposmics in the 200ms time-lag condition. Normosmics significantly exceeded 50% chance level at the time-lag of 80ms, whereas an/hyposmics were only able to score above chance starting from 120ms time-lag. Lateralization scores significantly decreased with age. CONCLUSIONS At a time lag of 200ms intranasal trigeminal stimuli can be lateralized. The reduced trigeminal sensitivity in patients with anosmia or hyposmia leads to an increased time lag required for correct perception of intranasal, almost simultaneously, applied stimuli.
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Affiliation(s)
- A Oleszkiewicz
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany; Institute of Psychology, University of Wroclaw, Wroclaw, Poland.
| | - T Meusel
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Erlangen Medical School, Erlangen, Germany
| | - M Güpfert
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Basel, Basel, Switzerland
| | - B Westermann
- Department of Neurosurgery, University of Basel, Basel, Switzerland
| | - T Hummel
- Smell and Taste Clinic, Department of Otorhinolaryngology, TU Dresden, Dresden, Germany
| | - A Welge-Lüssen
- Department of Otorhinolaryngology, Head and Neck Surgery, University of Basel, Basel, Switzerland
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25
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Otto A, Porzel A, Westermann B, Brandt W, Wessjohann L, Arnold N. Structural and stereochemical elucidation of new hygrophorones from Hygrophorus abieticola (Basidiomycetes). Tetrahedron 2017. [DOI: 10.1016/j.tet.2017.02.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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26
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Sultani HN, Haeri HH, Hinderberger D, Westermann B. Spin-labelled diketopiperazines and peptide-peptoid chimera by Ugi-multi-component-reactions. Org Biomol Chem 2016; 14:11336-11341. [PMID: 27878155 DOI: 10.1039/c6ob02194h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For the first time, spin-labelled coumpounds have been obtained by isonitrile-based multi component reactions (IMCRs). The typical IMCR Ugi-protocols offer a simple experimental setup allowing structural variety by which labelled diketopiperazines (DKPs) and peptide-peptoid chimera have been synthesized. The reaction keeps the paramagnetic spin label intact and offers a simple and versatile route to a large variety of new and chemically diverse spin labels.
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Affiliation(s)
- Haider N Sultani
- Leibniz-Institute of Plant Biochemistry, Department of Bioorganic Chemistry, Weinberg 3, 06120 Halle, Germany.
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27
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Morejón MC, Laub A, Westermann B, Rivera DG, Wessjohann LA. Solution- and Solid-Phase Macrocyclization of Peptides by the Ugi-Smiles Multicomponent Reaction: Synthesis of N-Aryl-Bridged Cyclic Lipopeptides. Org Lett 2016; 18:4096-9. [PMID: 27505031 DOI: 10.1021/acs.orglett.6b02001] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A new multicomponent methodology for the solution- and solid-phase macrocyclization of peptides is described. The approach comprises the utilization of the Ugi-Smiles reaction for the cyclization of 3-nitrotyrosine-containing peptides either by the N-terminus or the lysine side-chain amino groups. Both the on-resin and solution cyclizations took place with good to excellent efficiency in the presence of an aldehyde and a lipidic isocyanide, while the use of paraformaldehyde required an aminocatalysis-mediated imine formation prior to the on-resin Ugi-Smiles ring closure. The introduction of a turn motif in the peptide sequence facilitated the cyclization step, shortened the reaction time, and delivered crude products with >90% purity. This powerful method provided a variety of structurally novel N-aryl-bridged cyclic lipopeptides occurring as single atropisomers.
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Affiliation(s)
- Micjel C Morejón
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, 06120 Halle/Saale, Germany.,Center for Natural Products Research, Faculty of Chemistry, University of Havana , Zapata y G, 10400 Havana, Cuba
| | - Annegret Laub
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, 06120 Halle/Saale, Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, 06120 Halle/Saale, Germany
| | - Daniel G Rivera
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, 06120 Halle/Saale, Germany.,Center for Natural Products Research, Faculty of Chemistry, University of Havana , Zapata y G, 10400 Havana, Cuba
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, 06120 Halle/Saale, Germany
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28
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Otto A, Laub A, Wendt L, Porzel A, Schmidt J, Palfner G, Becerra J, Krüger D, Stadler M, Wessjohann L, Westermann B, Arnold N. Chilenopeptins A and B, Peptaibols from the Chilean Sepedonium aff. chalcipori KSH 883. J Nat Prod 2016; 79:929-38. [PMID: 26953507 DOI: 10.1021/acs.jnatprod.5b01018] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
The Chilean Sepedonium aff. chalcipori strain KSH 883, isolated from the endemic Boletus loyo Philippi, was studied in a polythetic approach based on chemical, molecular, and biological data. A taxonomic study of the strain using molecular data of the ITS, EF1-α, and RPB2 barcoding genes confirmed the position of the isolated strain within the S. chalcipori clade, but also suggested the separation of this clade into three different species. Two new linear 15-residue peptaibols, named chilenopeptins A (1) and B (2), together with the known peptaibols tylopeptins A (3) and B (4) were isolated from the semisolid culture of strain KSH 883. The structures of 1 and 2 were elucidated on the basis of HRESIMS(n) experiments in conjunction with comprehensive 1D and 2D NMR analysis. Thus, the sequence of chilenopeptin A (1) was identified as Ac-Aib(1)-Ser(2)-Trp(3)-Aib(4)-Pro(5)-Leu(6)-Aib(7)-Aib(8)-Gln(9)-Aib(10)-Aib(11)-Gln(12)-Aib(13)-Leu(14)-Pheol(15), while chilenopeptin B (2) differs from 1 by the replacement of Trp(3) by Phe(3). Additionally, the total synthesis of 1 and 2 was accomplished by a solid-phase approach, confirming the absolute configuration of all chiral amino acids as l. Both the chilenopeptins (1 and 2) and tylopeptins (3 and 4) were evaluated for their potential to inhibit the growth of phytopathogenic organisms.
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Affiliation(s)
- Alexander Otto
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Annegret Laub
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Lucile Wendt
- Department of Microbial Drugs, Helmholtz Centre for Infection Research , Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Jürgen Schmidt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
| | - Götz Palfner
- Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepción , Casilla 160-C, Concepción, Chile
| | - José Becerra
- Departamento de Botanica, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepción , Casilla 160-C, Concepción, Chile
| | - Dirk Krüger
- Department of Soil Ecology, Helmholtz Centre for Environmental Research , Theodor-Lieser-Strasse 4, D-06120 Halle (Saale), Germany
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research , Inhoffenstrasse 7, D-38124 Braunschweig, Germany
| | - Ludger Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 2, D-06120 Halle (Saale), Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
- Institute of Chemistry, Faculty of Natural Sciences II, Martin Luther University Halle-Wittenberg , Kurt-Mothes-Strasse 2, D-06120 Halle (Saale), Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry , Weinberg 3, D-06120 Halle (Saale), Germany
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Lima CGS, Ali A, van Berkel SS, Westermann B, Paixão MW. Emerging approaches for the synthesis of triazoles: beyond metal-catalyzed and strain-promoted azide-alkyne cycloaddition. Chem Commun (Camb) 2016; 51:10784-96. [PMID: 26066359 DOI: 10.1039/c5cc04114g] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Metal-free 1,3-dipolar cycloaddition reactions have proven to be a powerful tool for the assembly of key heterocycles, in particular diversely functionalized 1,2,3-triazoles. A number of metal-free (3+2)-cycloaddition approaches have been developed up to date with the aim to circumvent the use of metal catalysts allowing these reactions to take place in biological systems without perturbation of the naturally occurring processes. This feature article specifically provides an overview of emerging metal-free synthetic routes, and their mechanistic features, in the formation of functionalized 1,2,3-triazoles.
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Affiliation(s)
- Carolina G S Lima
- Department of Chemistry, Universidade Federal de São Carlos (UFSCar), São Carlos, SP, Brazil.
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Otto A, Laub A, Porzel A, Schmidt J, Wessjohann L, Westermann B, Arnold N. Isolation and Total Synthesis of Albupeptins A-D: 11-Residue Peptaibols from the FungusGliocladium album. European J Org Chem 2015. [DOI: 10.1002/ejoc.201501124] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Echemendía R, de La Torre AF, Monteiro JL, Pila M, Corrêa AG, Westermann B, Rivera DG, Paixão MW. Highly Stereoselective Synthesis of Natural-Product-Like Hybrids by an Organocatalytic/Multicomponent Reaction Sequence. Angew Chem Int Ed Engl 2015. [DOI: 10.1002/ange.201412074] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Echemendía R, de La Torre AF, Monteiro JL, Pila M, Corrêa AG, Westermann B, Rivera DG, Paixão MW. Highly stereoselective synthesis of natural-product-like hybrids by an organocatalytic/multicomponent reaction sequence. Angew Chem Int Ed Engl 2015; 54:7621-5. [PMID: 25967546 DOI: 10.1002/anie.201412074] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Revised: 03/19/2015] [Indexed: 01/29/2023]
Abstract
In an endeavor to provide an efficient route to natural product hybrids, described herein is an efficient, highly stereoselective, one-pot process comprising an organocatalytic conjugate addition of 1,3-dicarbonyls to α,β-unsaturated aldehydes followed by an intramolecular isocyanide-based multicomponent reaction. This approach enables the rapid assembly of complex natural product hybrids including up to four different molecular fragments, such as hydroquinolinone, chromene, piperidine, peptide, lipid, and glycoside moieties. The strategy combines the stereocontrol of organocatalysis with the diversity-generating character of multicomponent reactions, thus leading to structurally unique peptidomimetics integrating heterocyclic, lipidic, and sugar moieties.
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Affiliation(s)
- Radell Echemendía
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana (Cuba)
| | - Alexander F de La Torre
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, 97105-900, SP (Brasil)
| | - Julia L Monteiro
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, 97105-900, SP (Brasil)
| | - Michel Pila
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana (Cuba)
| | - Arlene G Corrêa
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, 97105-900, SP (Brasil)
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale) (Germany).,Martin-Luther-University, Halle Wittenberg, Institute of Chemistry, Kurt-Mothes-Str. 2, 06120 Halle (Germany)
| | - Daniel G Rivera
- Center for Natural Products Research, Faculty of Chemistry, University of Havana, Zapata y G, 10400, La Habana (Cuba).
| | - Márcio W Paixão
- Departamento de Química, Universidade Federal de São Carlos, São Carlos, 97105-900, SP (Brasil).
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Bette E, Otto A, Dräger T, Merzweiler K, Arnold N, Wessjohann L, Westermann B. Isolation and Asymmetric Total Synthesis of Fungal Secondary Metabolite Hygrophorone B 12
(Eur. J. Org. Chem. 11/2015). European J Org Chem 2015. [DOI: 10.1002/ejoc.201590027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Bette E, Otto A, Dräger T, Merzweiler K, Arnold N, Wessjohann L, Westermann B. Isolation and Asymmetric Total Synthesis of Fungal Secondary Metabolite Hygrophorone B12. European J Org Chem 2015. [DOI: 10.1002/ejoc.201403455] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Brauer MCN, Neves Filho RAW, Westermann B, Heinke R, Wessjohann LA. Synthesis of antibacterial 1,3-diyne-linked peptoids from an Ugi-4CR/Glaser coupling approach. Beilstein J Org Chem 2015; 11:25-30. [PMID: 25670988 PMCID: PMC4311588 DOI: 10.3762/bjoc.11.4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 12/23/2014] [Indexed: 12/20/2022] Open
Abstract
A library of ten 1,3-diyne-linked peptoids has been synthesized through an Ugi four-component reaction (U-4CR) followed by a copper-catalysed alkyne homocoupling (Glaser reaction). The short and chemoselective reaction sequence allows generating diverse (pseudo) dimeric peptoids. A combinatorial version allows the one-pot preparation of, e.g., six-compound-libraries of homo- and heterodimers verified by ESI-MS and HPLC. In a preliminary evaluation, some compounds display moderate activity against the Gram-positive bacterium Bacillus subtilis.
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Affiliation(s)
- Martin C N Brauer
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Ricardo A W Neves Filho
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Ramona Heinke
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
| | - Ludger A Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle/Saale, Germany
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Lima CGS, Ali A, van Berkel SS, Westermann B, Paixão MW. Correction: Emerging approaches for the synthesis of triazoles: beyond metal-catalyzed and strain-promoted azide–alkyne cycloaddition. Chem Commun (Camb) 2015; 51:12139. [DOI: 10.1039/c5cc90314a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Correction for 'Emerging approaches for the synthesis of triazoles: beyond metal-catalyzed and strain-promoted azide–alkyne cycloaddition' by Carolina G. S. Lima et al., Chem. Commun., 2015, 51, 10784–10796.
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Affiliation(s)
- Carolina G. S. Lima
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos
- Brazil
| | - Akbar Ali
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos
- Brazil
| | - Sander S. van Berkel
- Department of Bioorganic Chemistry
- Leibniz-Institute of Plant Biochemistry
- 06120 Halle
- Germany
| | - Bernhard Westermann
- Department of Bioorganic Chemistry
- Leibniz-Institute of Plant Biochemistry
- 06120 Halle
- Germany
- Martin-Luther-University Halle-Wittenberg
| | - Márcio W. Paixão
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos
- Brazil
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Alemanno F, Westermann B, Bettoni A, Candiani A, Cesana BM. Buprenorphine versus tramadol as perineural adjuvants for postoperative analgesia in patients undergoing arthroscopic rotator cuff repair under middle interscalene block: a retrospective study. Minerva Anestesiol 2014; 80:1198-1204. [PMID: 24569357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND The aim of this retrospective study was to compare buprenorphine and tramadol, in order to assess their different efficacy in prolonging postoperative analgesia and their associated side effects when used as perineural adjuvants with a local anesthetic. METHODS The clinical records of 161 consecutive ASA 1-2 adult patients scheduled for arthroscopic rotator cuff repair and fulfilling the inclusion/exclusion criteria were reviewed retrospectively. The anaesthesia was performed using the middle interscalene block (MIB). The 161 patients were divided into three groups (A, B, T) according to their utilization of buprenorphine (B), tramadol (T) or neither of the latter (A) as perineural adjuvants: group A (54 patients) - levobupivacaine 0.75%, 0.4 mL/kg; group B (56 patients) - levobupivacaine 0.75%, 0.4 mL/kg + 0.15 mg buprenorphine; group T (51 patients) - levobupivacaine 0.75%, 0.4 mL/kg + 100 mg tramadol. RESULTS The results showed that the group treated with buprenorphine benefited from a longer post-operative analgesia than that treated with local anesthetic alone (P<0.0001). Otherwise, a less evident not statistically significant (P=0.4825) difference turned out between the group treated with the anesthetic alone and the group treated with tramadol as adjuvant. No difference turned out to be between the local anesthetic alone treatment and the tramadol-local anesthetic one (P=0.4825; HR=0.863, 95% CI 0.574-1.299); on the contrary, a significant difference was demonstrated between the buprenophine-local anesthetic group and the local anesthetic alone one (P<0.0001; HR=0.330, 95% CI 0.216-0.530) CONCLUSION: Both buprenorphine and tramadol are effective as perineural adjuvants used in order to prolong the postoperative analgesia, buprenorphine proving more efficacious for this purpose than tramadol.
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Affiliation(s)
- F Alemanno
- Department of Anaesthesia and Pain Therapy, S. Camillo Clinic, Brescia, Italy -
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Abstract
OBJECTIVE This study aims to examine humans ́ abilities to localize odorants within the open field. METHODOLOGY Young participants were tested on a localization task using a relatively selective olfactory stimulus (2-phenylethyl-alcohol, PEA) and cineol, an odorant with a strong trigeminal component. Participants were blindfolded and had to localize an odorant source at 2 m distance (far-field condition) and a 0.4 m distance (near-field condition) with either two nostrils open or only one open nostril. RESULTS For the odorant with trigeminal properties, the number of correct trials did not differ when one or both nostrils were used, while more PEA localization trials were correctly completed with both rather than one nostril. In the near-field condition, correct localization was possible in 72-80% of the trials, irrespective of the odorant and the number of nostrils used. Localization accuracy, measured as spatial deviation from the olfactory source, was significantly higher in the near-field compared to the far-field condition, but independent of the odorant being localized. CONCLUSION Odorant localization within the open field is difficult, but possible. In contrast to the general view, humans seem to be able to exploit the two-nostril advantage with increasing task difficulty.
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Ali A, Corrêa AG, Alves D, Zukerman-Schpector J, Westermann B, Ferreira MAB, Paixão MW. An efficient one-pot strategy for the highly regioselective metal-free synthesis of 1,4-disubstituted-1,2,3-triazoles. Chem Commun (Camb) 2014; 50:11926-9. [DOI: 10.1039/c4cc04678a] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
A simple and efficient metal-free methodology for the regioselective synthesis of 1,4-disubstituted-1,2,3-triazoles by applying a novel inverse electron-demand-1,3-dipolar cycloaddition approach has been developed.
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Affiliation(s)
- Akbar Ali
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos, Brazil
| | - Arlene G. Corrêa
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos, Brazil
| | - Diego Alves
- Department of Chemistry
- Universidade Federal de Pelotas (UFPel)
- Pelotas, Brazil
| | | | - Bernhard Westermann
- Department of Bioorganic Chemistry
- Leibniz-Institute of Plant Biochemistry
- Halle, Germany
| | - Marco A. B. Ferreira
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos, Brazil
| | - Márcio W. Paixão
- Department of Chemistry
- Universidade Federal de São Carlos (UFSCar)
- São Carlos, Brazil
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Westermann B, Wessjohann L, Gulyas-Fekete G, Boluda C. Anti-Friedel-Crafts-Type Substitution To Form Biaryl Linkages. SYNTHESIS-STUTTGART 2013. [DOI: 10.1055/s-0033-1339682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
| | - Ludger Wessjohann
- Leibniz Institute of Plant Biochemistry, Department of Bioorganic Chemistry
| | | | - Carlos Boluda
- Leibniz Institute of Plant Biochemistry, Department of Bioorganic Chemistry
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Affiliation(s)
- Sebastian Brauch
- Leibniz-Institute of Plant Biochemistry, Dept. of Bioorganic Chemistry, Weinberg 3, 06120 Halle (Saale), Germany
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Neves Filho RAW, Stark S, Westermann B, Wessjohann LA. The multicomponent approach to N-methyl peptides: total synthesis of antibacterial (-)-viridic acid and analogues. Beilstein J Org Chem 2012; 8:2085-90. [PMID: 23209543 PMCID: PMC3511043 DOI: 10.3762/bjoc.8.234] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2012] [Accepted: 10/30/2012] [Indexed: 12/18/2022] Open
Abstract
Two syntheses of natural viridic acid, an unusual triply N-methylated peptide with two anthranilate units, are presented. The first one is based on peptide-coupling strategies and affords the optically active natural product in 20% overall yield over six steps. A more economical approach with only four steps leads to the similarly active racemate by utilizing a Ugi four-component reaction (Ugi-4CR) as the key transformation. A small library of viridic acid analogues is readily available to provide first SAR insight. The biological activities of the natural product and its derivatives against the Gram-negative bacterium Aliivibrio fischeri were evaluated.
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Affiliation(s)
- Ricardo A W Neves Filho
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle (Saale), Germany, Tel: +49 345 5582 1301, Address for correspondence)
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Connerth M, Tatsuta T, Haag M, Klecker T, Westermann B, Langer T. Intramitochondrial Transport of Phosphatidic Acid in Yeast by a Lipid Transfer Protein. Science 2012; 338:815-8. [DOI: 10.1126/science.1225625] [Citation(s) in RCA: 186] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Rivera DG, Pérez-Labrada K, Lambert L, Dörner S, Westermann B, Wessjohann LA. Carbohydrate-steroid conjugation by Ugi reaction: one-pot synthesis of triple sugar/pseudo-peptide/spirostane hybrids. Carbohydr Res 2012; 359:102-10. [PMID: 22925772 DOI: 10.1016/j.carres.2012.05.003] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2012] [Revised: 05/03/2012] [Accepted: 05/03/2012] [Indexed: 11/16/2022]
Abstract
The one-pot synthesis of novel molecular chimeras incorporating sugar, pseudo-peptide, and steroidal moieties is described. For this, a new carbohydrate-steroid conjugation approach based on the Ugi four-component reaction was implemented for the ligation of glucose and chacotriose to spirostanic steroids. The approach proved wide substrate scope, as both mono and oligosaccharides functionalized with amino, carboxy, and isocyano groups were conjugated to steroidal substrates in an efficient, multicomponent manner. Two alternative strategies based on the hydrazoic acid variant of the Ugi reaction were employed for the synthesis of tetrazole-based chacotriose-diosgenin conjugates resembling naturally occurring spirostan saponins. This is the first time that triple sugar/pseudo-peptide/steroid hybrids are produced, thus opening up an avenue of opportunities for applications in drug discovery and biological chemistry.
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Affiliation(s)
- Daniel G Rivera
- Center for Natural Products Study, Faculty of Chemistry, University of Havana, La Habana, Cuba.
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van Berkel SS, Brauch S, Gabriel L, Henze M, Stark S, Vasilev D, Wessjohann LA, Abbas M, Westermann B. Traceless tosylhydrazone-based triazole formation: a metal-free alternative to strain-promoted azide-alkyne cycloaddition. Angew Chem Int Ed Engl 2012; 51:5343-6. [PMID: 22514135 DOI: 10.1002/anie.201108850] [Citation(s) in RCA: 92] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Sander S van Berkel
- Department of Bioorganic Chemistry, Leibniz-Institute of Plant Biochemistry, Halle, Germany
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van Berkel SS, Brauch S, Gabriel L, Henze M, Stark S, Vasilev D, Wessjohann LA, Abbas M, Westermann B. “Spurlose” Tosylhydrazon-basierte Triazolsynthese: eine metallfreie Alternative zur ringspannungskatalysierten Azid-Alkin- Cycloaddition. Angew Chem Int Ed Engl 2012. [DOI: 10.1002/ange.201108850] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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van Berkel SS, Bögels BGM, Wijdeven MA, Westermann B, Rutjes FPJT. Recent Advances in Asymmetric Isocyanide-Based Multicomponent Reactions. European J Org Chem 2012. [DOI: 10.1002/ejoc.201200030] [Citation(s) in RCA: 178] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Brauch S, Henze M, Osswald B, Naumann K, Wessjohann LA, van Berkel SS, Westermann B. Fast and efficient MCR-based synthesis of clickable rhodamine tags for protein profiling. Org Biomol Chem 2012; 10:958-65. [DOI: 10.1039/c1ob06581e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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Neves Filho RAW, Westermann B, Wessjohann LA. Synthesis of (-)-julocrotine and a diversity oriented Ugi-approach to analogues and probes. Beilstein J Org Chem 2011; 7:1504-7. [PMID: 22238524 PMCID: PMC3252850 DOI: 10.3762/bjoc.7.175] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2011] [Accepted: 10/21/2011] [Indexed: 11/23/2022] Open
Abstract
An improved total synthesis of (−)-julocrotine in three steps from Cbz-glutamine, in 51% overall yield, is presented. To demonstrate the potential of the heterocyclic moiety for diversity oriented synthesis, a series of (−)-julocrotine analogues was synthesized by employing the heterocyclic precursor as an amino input in Ugi four-component reactions (Ugi-4CR) [1].
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Affiliation(s)
- Ricardo A W Neves Filho
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, 06120 Halle, Germany
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