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Liotta LJ, Antoine J, Brammer Basta LA, Campbell AS, Cole GY, Demick Brazile KA, Dogal Gardner NM, Fitzgerald ME, Francois JEK, French BM, Garafola SL, Giannetti CA, Granatosky EA, Harney AM, Hummel JT, Joyce AP, Keylor MH, Khubchandani JA, Korzeniecki C, Lieberman DC, Litterio JM, Maiorano MO, Marshall JF, McCarthy KA, Mendes Vieira A, Miller RM, Morrison ER, Moura SP, Neumann DF, Oliveira AF, Pace NJ, Plouffe JX, Pomfret MN, Reardon KN, Sheller-Miller SM, Smith MJ, Sullivan JL, Sweeney SW, Tougas KL. Efficient synthesis for each of the eight stereoisomers of the iminosugars lentiginosine and 1,4-dideoxy-1,4-imino-D-arabinitol (DAB). Carbohydr Res 2024; 545:109280. [PMID: 39326205 DOI: 10.1016/j.carres.2024.109280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2024] [Revised: 09/06/2024] [Accepted: 09/17/2024] [Indexed: 09/28/2024]
Abstract
Herein, we describe the efficient, diastereoselective syntheses of the iminosugars 1,4-dideoxy-1,4-imino-D-arabinitol (DAB) 1b, lentiginosine 3a, and the seven stereoisomers of each of these iminosugars starting from 4-benzoyl-6-deoxy-6-iodoglycopyranosides 47 with yields ranging from 38 % to 68 % for the DAB and isomers 1a-1h and from 44 % to 89 % for the lentiginosine and isomers 3a-3h. We also report the syntheses of the eight stereoisomers of the 4-benzoyl-6-deoxy-6-iodoglycopyranosides 47 from commercially available sugars. Key to the iminosugar syntheses is a single multistep reaction that converts the 4-benzoyl-6-deoxy-6-iodoglycopyranosides 47 to a vinyl pyrrolidine through a one-pot zinc mediated reductive elimination, followed by a reductive amination and finally an intramolecular nucleophilic substitution. Strategic selection of the amine utilized in the reductive amination and the functionalization of the intermediate carbon-carbon double bond provides access to a vast array of iminosugars.
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Affiliation(s)
- Louis J Liotta
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA.
| | - Jessica Antoine
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | | | - Andrew S Campbell
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Gabrielle Y Cole
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | | | | | - Megan E Fitzgerald
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Jean E K Francois
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Brian M French
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Sara L Garafola
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Catherine A Giannetti
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Eve A Granatosky
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Alycen M Harney
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - James T Hummel
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Andrew P Joyce
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Mitchell H Keylor
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Jasmine A Khubchandani
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Claudia Korzeniecki
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Diana C Lieberman
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Joshua M Litterio
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Madison O Maiorano
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Jessica F Marshall
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Kelly A McCarthy
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Andreia Mendes Vieira
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Ruby M Miller
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Emily R Morrison
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Steven P Moura
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Dillon F Neumann
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Aliza F Oliveira
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Nicholas J Pace
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Jodie X Plouffe
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Meredith N Pomfret
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Katelyn N Reardon
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | | | - Michael J Smith
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Jessica L Sullivan
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Samantha W Sweeney
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
| | - Kerstin L Tougas
- Department of Chemistry, Stonehill College, 320 Washington Street, Easton, MA, 02357, USA
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Meelua W, Wanjai T, Thinkumrob N, Oláh J, Mujika JI, Ketudat-Cairns JR, Hannongbua S, Jitonnom J. Active site dynamics and catalytic mechanism in arabinan hydrolysis catalyzed by GH43 endo-arabinanase from QM/MM molecular dynamics simulation and potential energy surface. J Biomol Struct Dyn 2021; 40:7439-7449. [PMID: 33715601 DOI: 10.1080/07391102.2021.1898469] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The endo-1,5-α-L-arabinanases, belonging to glycoside hydrolase family 43 (GH43), catalyse the hydrolysis of α-1,5-arabinofuranosidic bonds in arabinose-containing polysaccharides. These enzymes are proposed targets for industrial and medical applications. Here, molecular dynamics (MD), potential energy surface and free energy (potential of mean force) simulations are undertaken using hybrid quantum mechanical/molecular mechanical (QM/MM) potentials to understand the active site dynamics, catalytic mechanism and the electrostatic influence of active site residues of the GH43 endo-arabinanase from G. stearothermophilus. The calculated results give support to the single-displacement mechanism proposed for the inverting GH43 enzymes: first a proton is transferred from the general acid E201 to the substrate, followed by a nucleophilic attack by water, activated by the general base D27, on the anomer carbon. A conformational change (2E ↔E3 ↔ 4E) in the -1 sugar ring is observed involving a transition state featuring an oxocarbenium ion character. Residues D87, K106, H271 are highlighted as potential targets for future mutation experiments in order to increase the efficiency of the reaction. To our knowledge, this is the first QM/MM study providing molecular insights into the glycosidic bond hydrolysis of a furanoside substrate by an inverting GH in solution.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Wijitra Meelua
- Demonstration School, University of Phayao, Phayao, Thailand.,Division of Chemistry, School of Science, University of Phayao, Phayao, Thailand
| | | | | | - Julianna Oláh
- Department of Inorganic and Analytical Chemistry, Budapest University of Technology and Economics, Budapest, Hungary
| | - Jon I Mujika
- Kimika Fakultatea, Euskal Herriko Unibertsitatea UPV/EHU, and Donostia International Physics Center (DIPC), Donostia, Euskadi, Spain
| | - James R Ketudat-Cairns
- Center for Biomolecular Structure, Function and Application, Suranaree University of Technology, Nakhon Ratchasima, Thailand
| | - Supa Hannongbua
- Department of Chemistry, Faculty of Science, Kasetsart University, Bangkok, Thailand
| | - Jitrayut Jitonnom
- Division of Chemistry, School of Science, University of Phayao, Phayao, Thailand
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Zakharova AN, Awan SI, Nami F, Gotfredsen CH, Madsen R, Clausen MH. Synthesis of Two Tetrasaccharide Pentenyl Glycosides Related to the Pectic Rhamnogalacturonan I Polysaccharide. Molecules 2018; 23:molecules23020327. [PMID: 29401687 PMCID: PMC6017268 DOI: 10.3390/molecules23020327] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 01/29/2018] [Accepted: 02/01/2018] [Indexed: 11/29/2022] Open
Abstract
The synthesis of two protected tetrasaccharide pentenyl glycosides with diarabinan and digalactan branching related to the pectic polysaccharide rhamnogalacturonan I is reported. The strategy relies on the coupling of N-phenyl trifluoroacetimidate disaccharide donors to a common rhamnosyl acceptor. The resulting trisaccharide thioglycosides were finally coupled to an n-pentenyl galactoside acceptor to access the two protected branched tetrasaccharides.
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Affiliation(s)
- Alexandra N Zakharova
- Center for Nanomedicine and Theranostics, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
| | - Shahid I Awan
- Center for Nanomedicine and Theranostics, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
| | - Faranak Nami
- Center for Nanomedicine and Theranostics, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
| | - Charlotte H Gotfredsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
| | - Robert Madsen
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
| | - Mads H Clausen
- Center for Nanomedicine and Theranostics, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
- Department of Chemistry, Technical University of Denmark, Kemitorvet 207, DK-2800 Kgs. Lyngby, Denmark.
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