1
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Paul P, Sarkar S, Dastidar DG, Shukla A, Das S, Chatterjee S, Chakraborty P, Tribedi P. 1, 4-naphthoquinone efficiently facilitates the disintegration of pre-existing biofilm of Staphylococcus aureus through eDNA intercalation. Folia Microbiol (Praha) 2023; 68:843-854. [PMID: 37142893 DOI: 10.1007/s12223-023-01053-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 04/04/2023] [Indexed: 05/06/2023]
Abstract
1, 4-naphthoquinone, a plant-based quinone derivative, has gained much attention for its effectiveness against several biofilm-linked diseases. The biofilm inhibitory effect of 1, 4-naphthoquinone against Staphylococcus aureus has already been reported in our previous study. We observed that the extracellular DNA (eDNA) could play an important role in holding the structural integrity of the biofilm. Hence, in this study, efforts have been directed to examine the possible interactions between 1, 4-naphthoquinone and DNA. An in silico analysis indicated that 1, 4-naphthoquinone could interact with DNA through intercalation. To validate the same, UV-Vis spectrophotometric analysis was performed in which a hypochromic shift was observed when the said molecule was titrated with calf-thymus DNA (CT-DNA). Thermal denaturation studies revealed a change of 8℃ in the melting temperature (Tm) of CT-DNA when complexed with 1, 4-naphthoquinone. The isothermal calorimetric titration (ITC) assay revealed a spontaneous intercalation between CT-DNA and 1, 4-naphthoquinone with a binding constant of 0.95 ± 0.12 × 108. Furthermore, DNA was run through an agarose gel electrophoresis with a fixed concentration of ethidium bromide and increasing concentrations of 1, 4-naphthoquinone. The result showed that the intensity of ethidium bromide-stained DNA got reduced concomitantly with the gradual increase of 1, 4-naphthoquinone suggesting its intercalating nature. To gain further confidence, the pre-existing biofilm was challenged with ethidium bromide wherein we observed that it could also show biofilm disintegration. Therefore, the results suggested that 1, 4-naphthoquinone could exhibit disintegration of the pre-existing biofilm of Staphylococcus aureus through eDNA intercalation.
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Affiliation(s)
- Payel Paul
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India
| | - Sarita Sarkar
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India
| | - Debabrata Ghosh Dastidar
- Guru Nanak Institute of Pharmaceutical Science and Technology, 157/F Nilgunj Road, Panihati, Kolkata, West Bengal, 700114, India
| | - Aditya Shukla
- Department of Microbiology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata, 700019, India
| | - Sharmistha Das
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India
| | - Sudipta Chatterjee
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India
| | - Poulomi Chakraborty
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India
| | - Prosun Tribedi
- Microbial Ecology Laboratory, Department of Biotechnology, The Neotia University, Sarisha, West Bengal, 743368, India.
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2
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Manta S, Kollatos N. Unusual seven-membered ring sugars and nucleosides: synthesis and biological properties. NUCLEOSIDES, NUCLEOTIDES & NUCLEIC ACIDS 2022; 42:407-425. [PMID: 36451584 DOI: 10.1080/15257770.2022.2151623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Methods of the synthesis and the investigation of the properties of unnatural seven-memebered cyclic sugars and nucleosides, are of high interest. Septanoses provide conformationally more flexible sugars and due to their similarity to natural carbohydrates they have interesting and potentially useful physical, chemical, and biological properties. Additionally, nucleosides with seven-membered sugar moiety are commonly found in natural products and biologically active molecules. Modification of such nucleosides hold great promise as therapeutic agents. The present review describes the chemical synthesis and biological properties of septanoses as well as nucleosides containing septanosyl moieties.
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Affiliation(s)
- Stella Manta
- Department of Biochemistry and Biotechnology, Laboratory of Bioorganic Chemistry, University of Thessaly, Larissa, Greece
| | - Nikolaos Kollatos
- Department of Biochemistry and Biotechnology, Laboratory of Bioorganic Chemistry, University of Thessaly, Larissa, Greece
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3
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Pote AR, Pascual S, Planas A, Peczuh MW. Indolyl Septanoside Synthesis for In Vivo Screening of Bacterial Septanoside Hydrolases. Int J Mol Sci 2021; 22:4497. [PMID: 33925857 PMCID: PMC8123396 DOI: 10.3390/ijms22094497] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/22/2021] [Accepted: 04/23/2021] [Indexed: 12/29/2022] Open
Abstract
Building-up and breaking-down of carbohydrates are processes common to all forms of life. Glycoside hydrolases are a broad class of enzymes that play a central role in the cleavage of glycosidic bonds, which is fundamental to carbohydrate degradation. The large majority of substrates are five- and six-membered ring glycosides. Our interest in seven-membered ring septanose sugars has inspired the development of a way to search for septanoside hydrolase activity. Described here is a strategy for the discovery of septanoside hydrolases that uses synthetic indolyl septanosides as chromogenic substrates. Access to these tool compounds was enabled by a route where septanosyl halides act as glycosyl donors for the synthesis of the indolyl septanosides. The screening strategy leverages the known dimerization of 3-hydroxy-indoles to make colored dyes, as occurs when the β-galactosidase substrate X-Gal is hydrolyzed. Because screens in bacterial cells would enable searches in organisms that utilize heptoses or from metagenomics libraries, we also demonstrate that septanosides are capable of entering E. coli cells through the use of a BODIPY-labeled septanoside. The modularity of the indolyl septanoside synthesis should allow the screening of a variety of substrates that mimic natural structures via this general approach.
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Affiliation(s)
- Aditya R. Pote
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road U3060, Storrs, CT 06269, USA;
| | - Sergi Pascual
- Laboratory of Biochemistry, Institute Químic de Sarrià, University Ramon Llull, 08017 Barcelona, Spain;
| | - Antoni Planas
- Laboratory of Biochemistry, Institute Químic de Sarrià, University Ramon Llull, 08017 Barcelona, Spain;
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 N. Eagleville Road U3060, Storrs, CT 06269, USA;
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4
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Chennamadhavuni D, Saavedra-Avila NA, Carreño LJ, Guberman-Pfeffer MJ, Arora P, Yongqing T, Pryce R, Koay HF, Godfrey DI, Keshipeddy S, Richardson SK, Sundararaj S, Lo JH, Wen X, Gascón JA, Yuan W, Rossjohn J, Le Nours J, Porcelli SA, Howell AR. Dual Modifications of α-Galactosylceramide Synergize to Promote Activation of Human Invariant Natural Killer T Cells and Stimulate Anti-tumor Immunity. Cell Chem Biol 2018; 25:571-584.e8. [PMID: 29576533 PMCID: PMC6025895 DOI: 10.1016/j.chembiol.2018.02.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2017] [Revised: 01/11/2018] [Accepted: 02/16/2018] [Indexed: 12/13/2022]
Abstract
Glycosylceramides that activate CD1d-restricted invariant natural killer T (iNKT) cells have potential therapeutic applications for augmenting immune responses against cancer and infections. Previous studies using mouse models identified sphinganine variants of α-galactosylceramide as promising iNKT cell activators that stimulate cytokine responses with a strongly proinflammatory bias. However, the activities of sphinganine variants in mice have generally not translated well to studies of human iNKT cell responses. Here, we show that strongly proinflammatory and anti-tumor iNKT cell responses were achieved in mice by a variant of α-galactosylceramide that combines a sphinganine base with a hydrocinnamoyl ester on C6″ of the sugar. Importantly, the activities observed with this variant were largely preserved for human iNKT cell responses. Structural and in silico modeling studies provided a mechanistic basis for these findings and suggested basic principles for capturing useful properties of sphinganine analogs of synthetic iNKT cell activators in the design of immunotherapeutic agents.
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Affiliation(s)
| | | | - Leandro J Carreño
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Millennium Institute on Immunology and Immunotherapy, Programa de Inmunologia, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | | | - Pooja Arora
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Tang Yongqing
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Rhys Pryce
- Division of Structural Biology, Wellcome Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Hui-Fern Koay
- Department of Microbiology & Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia
| | - Dale I Godfrey
- Department of Microbiology & Immunology, Peter Doherty Institute for Infection and Immunity, University of Melbourne, Melbourne, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging at the University of Melbourne, Melbourne, Australia
| | - Santosh Keshipeddy
- Department of Chemistry, The University of Connecticut, Storrs, CT 06269-3060, USA
| | - Stewart K Richardson
- Department of Chemistry, The University of Connecticut, Storrs, CT 06269-3060, USA
| | - Srinivasan Sundararaj
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia
| | - Jae Ho Lo
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Xiangshu Wen
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - José A Gascón
- Department of Chemistry, The University of Connecticut, Storrs, CT 06269-3060, USA
| | - Weiming Yuan
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Jamie Rossjohn
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia; Institute of Infection and Immunity, Cardiff University, School of Medicine, Heath Park, Cardiff CF14 4XN, UK
| | - Jérôme Le Nours
- Infection and Immunity Program, Department of Biochemistry and Molecular Biology, Biomedicine Discovery Institute, Monash University, Clayton, VIC 3800, Australia; Australian Research Council Centre of Excellence for Advanced Molecular Imaging, Monash University, Clayton, VIC 3800, Australia.
| | - Steven A Porcelli
- Department of Microbiology and Immunology, Albert Einstein College of Medicine, Bronx, NY 10461, USA; Department of Medicine, Albert Einstein College of Medicine, Bronx, NY 10461, USA.
| | - Amy R Howell
- Department of Chemistry, The University of Connecticut, Storrs, CT 06269-3060, USA.
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5
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Pote AR, Vannam R, Richard A, Gascón J, Peczuh MW. Formation of and Glycosylation with Per‐
O
‐Acetyl Septanosyl Halides: Rationalizing Complex Reactivity En Route to
p
‐Nitrophenyl Septanosides. European J Org Chem 2018. [DOI: 10.1002/ejoc.201800310] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Aditya R. Pote
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Raghu Vannam
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Alissa Richard
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - José Gascón
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
| | - Mark W. Peczuh
- Department of Chemistry University of Connecticut 55 N. Eagleville Road, U3060 06269‐3060 Storrs CT USA
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6
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Sager CP, Fiege B, Zihlmann P, Vannam R, Rabbani S, Jakob RP, Preston RC, Zalewski A, Maier T, Peczuh MW, Ernst B. The price of flexibility - a case study on septanoses as pyranose mimetics. Chem Sci 2017; 9:646-654. [PMID: 29629131 PMCID: PMC5868388 DOI: 10.1039/c7sc04289b] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2017] [Accepted: 11/07/2017] [Indexed: 12/22/2022] Open
Abstract
Seven-membered ring mimetics of mannose were studied as ligands for the mannose-specific bacterial lectin FimH, which plays an essential role in the first step of urinary tract infections (UTI). A competitive binding assay and isothermal titration calorimetry (ITC) experiments indicated an approximately ten-fold lower affinity for the seven-membered ring mannose mimetic 2-O-n-heptyl-1,6-anhydro-d-glycero-d-galactitol (7) compared to n-heptyl α-d-mannopyranoside (2), resulting exclusively from a loss of conformational entropy. Investigations by solution NMR, X-ray crystallography, and molecular modeling revealed that 7 establishes a superimposable H-bond network compared to mannoside 2, but at the price of a high entropic penalty due to the loss of its pronounced conformational flexibility. These results underscore the importance of having access to the complete thermodynamic profile of a molecular interaction to "rescue" ligands from entropic penalties with an otherwise perfect fit to the protein binding site.
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Affiliation(s)
- Christoph P Sager
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Brigitte Fiege
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Pascal Zihlmann
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Raghu Vannam
- Department of Chemistry , University of Connecticut , 55 N. Eagleville Road U3060, Storrs , CT , 06279 USA .
| | - Said Rabbani
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Roman P Jakob
- University of Basel , Biozentrum: Focal Area Structural Biology , Klingelbergstrasse 70 , 4056 Basel , Switzerland
| | - Roland C Preston
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Adam Zalewski
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
| | - Timm Maier
- University of Basel , Biozentrum: Focal Area Structural Biology , Klingelbergstrasse 70 , 4056 Basel , Switzerland
| | - Mark W Peczuh
- Department of Chemistry , University of Connecticut , 55 N. Eagleville Road U3060, Storrs , CT , 06279 USA .
| | - Beat Ernst
- University of Basel , Institute of Molecular Pharmacy , Pharmacenter of the University of Basel , Klingelbergstrasse 50 , 4056 , Basel , Switzerland .
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7
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Palanivel U, Lakshmipathi S. Hydrogen bonds in Zif268 proteins – a theoretical perspective. J Biomol Struct Dyn 2016; 34:1607-24. [DOI: 10.1080/07391102.2015.1085903] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Umadevi Palanivel
- Department of Physics, Bharathiar University, Coimbatore 641 046, Tamil Nadu, India
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8
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Vannam R, Peczuh MW. A practical and scalable synthesis of carbohydrate based oxepines. Org Biomol Chem 2016; 14:3989-96. [PMID: 27056249 DOI: 10.1039/c6ob00262e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient, seven-step synthesis of carbohydrate based oxepines is reported using per-O-acetyl septanoses as key intermediates. The scope of the synthesis was evaluated by varying both the pyranose starting materials and protecting groups incorporated into the oxepine products. The practicality of the method make it amenable to scale up as demonstrated by the gram-scale synthesis of the d-glucose derived oxepine.
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Affiliation(s)
- Raghu Vannam
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U-3060, Storrs, CT 06269, USA.
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9
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Vannam R, Peczuh MW. How to Homologate Your Sugar: Synthetic Approaches to Septanosyl Containing Carbohydrates. European J Org Chem 2016. [DOI: 10.1002/ejoc.201600052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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10
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Synthesis and affinities of C3-symmetric thioglycoside-containing trimannosides. Carbohydr Res 2015; 412:56-65. [DOI: 10.1016/j.carres.2015.05.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2015] [Revised: 05/06/2015] [Accepted: 05/07/2015] [Indexed: 12/20/2022]
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11
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σ-Ferrier rearrangement of carbohydrate derived vinylcyclopropanes: a facile approach to oxepane analogs. Tetrahedron 2014. [DOI: 10.1016/j.tet.2014.07.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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12
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Venukumar P, Sudharani C, Sridhar PR. A one-pot septanoside formation and glycosylation of acyclic dithioacetals derived from 1,2-cyclopropanated sugars. Chem Commun (Camb) 2014; 50:2218-21. [DOI: 10.1039/c3cc49116a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
A one-pot septanoside formation and glycosylation of acyclic dithioacetals derived from 1,2-cyclopropanated sugars is reported.
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13
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Vannam R, Peczuh MW. Synthesis of C-Septanosides from Pyranoses via Vinyl Addition and Electrophilic Cyclization. Org Lett 2013; 15:4122-5. [DOI: 10.1021/ol401769k] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Raghu Vannam
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U-3060, Storrs, Connecticut 06269, United States
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U-3060, Storrs, Connecticut 06269, United States
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14
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Sridhar PR, Venukumar P. A Ring Expansion–Glycosylation Strategy toward the Synthesis of Septano-oligosaccharides. Org Lett 2012; 14:5558-61. [DOI: 10.1021/ol302677z] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Affiliation(s)
| | - Patteti Venukumar
- School of Chemistry, University of Hyderabad, Hyderabad 500046, India
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15
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Saha J, Peczuh MW. Glycosylations with a septanosyl fluoride donor lacking a C2 protecting group. Tetrahedron Lett 2012. [DOI: 10.1016/j.tetlet.2012.08.039] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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Abstract
Seven-atom ring sugars, called septanoses, are increasingly the focus of scientific inquiries because of their potential biological activities. This article details the synthesis, conformational analysis, and protein-binding properties of septanose carbohydrates. A distinction is drawn between septanoses that are substituted in the 6-position of the ring and those that are not. When a C-6 substituent is absent, the structure is essentially that of an aldohexose in its septanose, rather than furanose or pyranose, ring form; they may play as-of-yet unexplored roles in glycobiology. Septanoses having a hydroxymethyl group at C-6, on the other hand, are ring-expanded analogues of pyranoses. Syntheses have moved beyond the preparation of seven-membered ring monosaccharides to the development of septanosyl donors. These donors have been used in the synthesis of novel di- and trisaccharides that contain septanoses as well as a variety of glycoconjugates. Low-energy conformations adopted by septanoses have been organized based on ring substitution and stereochemistry. Instances where septanoses have been demonstrated to bind to natural proteins are presented and analyzed. The major conclusion drawn in the chapter is that advances in the synthesis of septanose carbohydrates now enable a detailed investigation of their activity in a number of biological contexts.
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17
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Saha J, Peczuh MW. Expanding the Scope of Aminosugars: Synthesis of 2‐Amino Septanosyl Glycoconjugates Using Septanosyl Fluoride Donors. Chemistry 2011; 17:7357-65. [DOI: 10.1002/chem.201003721] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2010] [Revised: 03/21/2011] [Indexed: 01/25/2023]
Affiliation(s)
- Jaideep Saha
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
| | - Mark W. Peczuh
- Department of Chemistry, University of Connecticut, 55 North Eagleville Road, U‐3060, Storrs, CT 06269 (USA), Fax: (+1) 860‐486‐2981
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