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Computational insight into networking H-bonds in open and cyclic forms of galactose. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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2
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Kotena ZM, Fattahi A. Computational insight into networking H‐bonds in open and cyclic forms of glucose. J PHYS ORG CHEM 2021. [DOI: 10.1002/poc.4285] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
| | - Alireza Fattahi
- Department of Chemistry Sharif University of Technology Tehran Iran
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3
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Afonin AV, Sterkhova IV, Vashchenko AV, Sigalov MV. Estimating the energy of intramolecular bifurcated (three-centered) hydrogen bond by X-ray, IR and 1 H NMR spectroscopy, and QTAIM calculations. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.02.106] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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4
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Amiri Rudbari H, Khorshidifard M, Askari B, Habibi N, Bruno G. New asymmetric Schiff base ligand derived from allylamine and 2,3-dihydroxybenzaldehyde and its molybdenum(VI) complex: Synthesis, characterization, crystal structures, computational studies and antibacterial activity together with synergistic effect against Pseudomonas aeroginosa PTTC 1570. Polyhedron 2015. [DOI: 10.1016/j.poly.2015.07.060] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Wang X, Yao M, Yang B, Fu Y, Hu F, Liang A. Enzymology and thermal stability of phytase appA mutants. RSC Adv 2015. [DOI: 10.1039/c5ra02199e] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
(A) The comparison of different melting temperature (Tm) of appA ( ), appAM8 ( ) and appAM10 ( ). TheTmvalues were 60 °C for appA, 64.1 °C for appAM8, and 67.5 °C for appAM10. (B) Titration curves of the addition TNS to appAM10 (a) and appA (b).
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Affiliation(s)
- Xi Wang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Biotechnology
- Shanxi University
- Taiyuan 030006
- China
| | - Mingze Yao
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Biotechnology
- Shanxi University
- Taiyuan 030006
- China
| | - Binsheng Yang
- Institute of Molecular Science
- Shanxi University
- Taiyuan 030006
- China
| | - Yuejun Fu
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Biotechnology
- Shanxi University
- Taiyuan 030006
- China
| | - Fengyun Hu
- Department of Neurology
- Shanxi Provincial People's Hospital
- Taiyuan 030012
- China
| | - Aihua Liang
- Key Laboratory of Chemical Biology and Molecular Engineering of Ministry of Education
- Institute of Biotechnology
- Shanxi University
- Taiyuan 030006
- China
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6
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Srivastava A, Varghese B, Loganathan D. Exploring the Effect of Bioisosteric Replacement of Carboxamide by a Sulfonamide Moiety on N-Glycosidic Torsions and Molecular Assembly: Synthesis and X-ray Crystallographic Investigation of N-(β-D-Glycosyl)sulfonamides as N-Glycoprotein Linkage Region An. Chemistry 2013; 19:17720-32. [DOI: 10.1002/chem.201302018] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2013] [Indexed: 11/09/2022]
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7
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Mathiselvam M, Ramkumar V, Loganathan D, Pérez S. Effect of distal sugars and interglycosidic linkage on the N-glycoprotein linkage region conformation: synthesis and X-ray crystallographic investigation of β-1-N-alkanamide derivatives of cellobiose and maltose as disaccharide analogs of the conserved chitobiosylasparagine linkage. Glycoconj J 2013; 31:71-87. [PMID: 24150739 DOI: 10.1007/s10719-013-9504-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2013] [Revised: 10/07/2013] [Accepted: 10/07/2013] [Indexed: 11/27/2022]
Abstract
The linkage region constituents, 2-deoxy-2-acetamido-β-D-glucopyranose (GlcNAc) and L-asparagine (Asn) are conserved in the N-glycoproteins of all eukaryotes. Elucidation of the structure and conformation of the linkage region of glycoproteins is important to understand the presentation and dynamics of the carbohydrate chain at the protein/cell surface. Earlier crystallographic studies using monosaccharide models and analogs of N-glycoprotein linkage region have shown that the N-glycosidic torsion, ϕN, is more influenced by the structural variation in the sugar part than that of the aglycon moiety. To access the influence of distal sugar as well as interglycosidic linkage (α or β) on the N-glycosidic torsion angles, cellobiosyl and maltosyl alkanamides have been synthesized and structural features of seven of these analogs have been characterized by X-ray crystallography. Comparative analysis of the seven disaccharide analogs with the reported monosaccharide analogs showed that the ϕN value of cellobiosyl analogs deviate ~9° with respect to GlcβNHAc. In the case of maltosyl analogs, deviation is more than 18°. These deviations indicate that the N-glycosidic torsion is influenced by addition of distal sugar as well as with respect to inter glycosidic linkage (α or β); it is less influenced by changes occurring at the aglycon. The χ₂ value of alkanamide derived from glucose, cellobiose and maltose exhibit a large range of variations (from 1.6° to -109.9°). This large span of χ₂ value suggests the greater degree of rotational freedom around C1'-C2' bond which is restricted in GlcNAc alkanamides. The present finding explicitly proved the importance of molecular architecture in the N-glycoproteins linkage region to maintain the linearity, planarity and rigidity. These factors are necessary for N-glycan to serve role in inter- as well as intramolecular carbohydrate-protein interactions.
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Affiliation(s)
- Manoharan Mathiselvam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai, 600036, India,
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8
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Srivastava A, Varghese B, Loganathan D. Synthesis and X-ray crystallographic investigation of N-(α-D-arabinopyranosyl)alkanamides as N-glycoprotein linkage region analogs. Carbohydr Res 2013; 380:92-100. [PMID: 23981855 DOI: 10.1016/j.carres.2013.07.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 07/28/2013] [Accepted: 07/29/2013] [Indexed: 01/10/2023]
Abstract
N-Glycoprotein linkage region constituents namely 2-deoxy-2-acetamido-β-D-glucopyranose (GlcNAc) and asparagine (Asn) are conserved among all eukaryotes. Earlier crystallographic studies on the linkage region conformation revealed that among all the models and analogs of the N-glycoprotein linkage region, XylβNHAc showed maximum deviation in the ϕN value as compared to the value reported for the model compound, GlcNAcβNHAc. In order to understand the effect of another pentopyranose, viz., arabinose, on the N-glycosidic torsion angles and molecular assembly, three arabinopyranosyl alkanamides were synthesized and their X-ray crystal structures elucidated. A comparative analysis of the N-glycosidic torsion, ϕN of the three analogs revealed the greater rotational freedom around the C1-N1 bond as compared to the GlcNAc derivatives. Molecular assembly of propionamido and chloroacetamido derivatives is characterized by the presence of anti-parallel bilayers of the molecules. This unique molecular assembly is hitherto unknown in all other models and analogs of N-glycoprotein linkage region. This study reveals that N-glycosidic torsions are influenced by the glycan as well as molecular packing.
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Affiliation(s)
- Amrita Srivastava
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
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9
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Mathiselvam M, Loganathan D, Varghese B. Synthesis of N-(β-D-glycuronopyranosyl)alkanamides and 1-(β-D-glycuronopyranosyl)-4-phenyl-[1,2,3]-triazoles as N-glycoprotein linkage region analogs: examination of the effect of C5 substituent on the N-glycosidic torsion (ΦN) based on X-ray crystallography. Carbohydr Res 2013; 380:1-8. [PMID: 23896157 DOI: 10.1016/j.carres.2013.06.023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2013] [Revised: 06/20/2013] [Accepted: 06/26/2013] [Indexed: 11/30/2022]
Abstract
The torsion angle around the N-glycoprotein linkage region (GlcNAc-Asn) is an important factor for presenting sugar on the cell surface which is crucial for many biological processes. Earlier studies using model and analogs showed that this important torsion angle is greatly influenced by substitutions in the sugar part. In the present work, uronic acid alkanamides and triazole derivatives have been designed and synthesized as newer analogs of N-glycoprotein linkage region to understand the influence of the carboxylic group on linkage region torsion as well as on molecular packing. Crystal structure of N-(β-D-galacturonopyranosyl)acetamide is solved with the space group of P22121. Comparison of the torsion angle and molecular packing of this compound with N-(β-D-galactopyranosyl)acetamide showed that changing the C6-hydoxymethyl group to the carboxylic acid group has minimum influence on the N-glycosidic torsion angle, ΦN and significant influence on the molecular packing.
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Affiliation(s)
- Manoharan Mathiselvam
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600036, India.
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10
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Mathiselvam M, Srivastava A, Varghese B, Pérez S, Loganathan D. Synthesis and X-ray crystallographic investigation of N-(β-d-glycosyl)butanamides derived from GlcNAc and chitobiose as analogs of the conserved chitobiosylasparagine linkage of N-glycoproteins. Carbohydr Res 2013; 380:37-44. [DOI: 10.1016/j.carres.2013.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2013] [Revised: 07/07/2013] [Accepted: 07/10/2013] [Indexed: 12/01/2022]
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11
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Golan A, Bravaya KB, Kudirka R, Kostko O, Leone SR, Krylov AI, Ahmed M. Ionization of dimethyluracil dimers leads to facile proton transfer in the absence of hydrogen bonds. Nat Chem 2012; 4:323-9. [DOI: 10.1038/nchem.1298] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2011] [Accepted: 02/07/2012] [Indexed: 01/26/2023]
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12
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Tsuzuki S, Uchimaru T, Mikami M. Magnitude of CH/O interactions between carbohydrate and water. Theor Chem Acc 2012. [DOI: 10.1007/s00214-012-1192-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Srivastava A, Varghese B, Loganathan D. X-Ray Crystallographic Investigation of Fully Acetylated N-(2-Deoxy-2-Acetamido-β-D-Glucopyranosyl)Alkanamides as N-Glycoprotein Linkage Region Analogs. J Carbohydr Chem 2012. [DOI: 10.1080/07328303.2011.631237] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Amrita Srivastava
- a Department of Chemistry , Indian Institute of Technology Madras , Chennai , – 600036 , India
| | - Babu Varghese
- b Department of Chemistry, Sophisticated Analytical Instrumentation Facility , Indian Institute of Technology Madras , Chennai , – 600036 , India
| | - Duraikkannu Loganathan
- a Department of Chemistry , Indian Institute of Technology Madras , Chennai , – 600036 , India
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14
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Ngan NK, Lo KM, Wong CSR. Synthesis, structure studies and electrochemistry of molybdenum(VI) Schiff base complexes in the presence of different donor solvent molecules. Polyhedron 2011. [DOI: 10.1016/j.poly.2011.08.038] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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15
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Mathiselvam M, Varghese B, Loganathan D. Synthesis and X-ray crystallographic investigation of N-(3-deoxy-3-acetamido-β-D-glycopyranosyl)alkanamides as analogs of N-glycoprotein linkage region. Glycoconj J 2011; 28:573-80. [DOI: 10.1007/s10719-011-9357-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2011] [Revised: 10/10/2011] [Accepted: 10/12/2011] [Indexed: 10/16/2022]
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16
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Cioci G, Srivastava A, Loganathan D, Mason SA, Pérez S, Imberty A. Low-Temperature Neutron Diffraction Structures of N-Glycoprotein Linkage Models and Analogues: Structure Refinement and Trifurcated Hydrogen Bonds. J Am Chem Soc 2011; 133:10042-5. [DOI: 10.1021/ja203239j] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gianluca Cioci
- European Synchrotron Radiation Facility, BP220 Grenoble, France
| | | | | | | | - Serge Pérez
- European Synchrotron Radiation Facility, BP220 Grenoble, France
| | - Anne Imberty
- CERMAV-CNRS (affiliated with Université Joseph Fourier and ICMG), BP53 Grenoble, France
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Design of thermostable beta-propeller phytases with activity over a broad range of pHs and their overproduction by Pichia pastoris. Appl Environ Microbiol 2010; 76:6423-30. [PMID: 20693453 DOI: 10.1128/aem.00253-10] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Thermostable phytases, which are active over broad pH ranges, may be useful as feed additives, since they can resist the temperatures used in the feed-pelleting process. We designed new beta-propeller phytases, using a structure-guided consensus approach, from a set of amino acid sequences from Bacillus phytases and engineered Pichia pastoris strains to overproduce the enzymes. The recombinant phytases were N-glycosylated, had the correct amino-terminal sequence, showed activity over a pH range of 2.5 to 9, showed a high residual activity after 10 min of heat treatment at 80°C and pH 5.5 or 7.5, and were more thermostable at pH 7.5 than a recombinant form of phytase C from Bacillus subtilis (GenBank accession no. AAC31775). A structural analysis suggested that the higher thermostability may be due to a larger number of hydrogen bonds and to the presence of P257 in a surface loop. In addition, D336 likely plays an important role in the thermostability of the phytases at pH 7.5. The recombinant phytases showed higher thermostability at pH 5.5 than at pH 7.5. This difference was likely due to a different protein total charge at pH 5.5 from that at pH 7.5. The recombinant beta-propeller phytases described here may have potential as feed additives and in the pretreatment of vegetable flours used as ingredients in animal diets.
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18
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Li Q, Hu T, An X, Li W, Cheng J, Gong B, Sun J. Theoretical study of the interplay between lithium bond and hydrogen bond in complexes involved with HLi and HCN. Chemphyschem 2010; 10:3310-5. [PMID: 19830767 DOI: 10.1002/cphc.200900549] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The lithium- and hydrogen-bonded complex of HLi-NCH-NCH is studied with ab initio calculations. The optimized structure, vibrational frequencies, and binding energy are calculated at the MP2 level with 6-311++G(2d,2p) basis set. The interplay between lithium bonding and hydrogen bonding in the complex is investigated with these properties. The effect of lithium bonding on the properties of hydrogen bonding is larger than that of hydrogen bonding on the properties of lithium bonding. In the trimer, the binding energies are increased by about 19% and 61% for the lithium and hydrogen bonds, respectively. A big cooperative energy (-5.50 kcal mol(-1)) is observed in the complex. Both the charge transfer and induction effect due to the electrostatic interaction are responsible for the cooperativity in the trimer. The effect of HCN chain length on the lithium bonding has been considered. The natural bond orbital and atoms in molecules analyses indicate that the electrostatic force plays a main role in the lithium bonding. A many-body interaction analysis has also been performed for HLi-(NCH)(N) (N=2-5) systems.
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Affiliation(s)
- Qingzhong Li
- The Laboratory of Theoretical and Computational Chemistry, Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, PR China.
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Fernández-Tejada A, Corzana F, Busto JH, Jiménez-Osés G, Jiménez-Barbero J, Avenoza A, Peregrina JM. Insights into the geometrical features underlying beta-O-GlcNAc glycosylation: water pockets drastically modulate the interactions between the carbohydrate and the peptide backbone. Chemistry 2009; 15:7297-301. [PMID: 19544521 DOI: 10.1002/chem.200901204] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alberto Fernández-Tejada
- Departamento de Química, Universidad de La Rioja, UA-CSIC. Madre de Dios 51, 26006 Logroño, La Rioja, Spain
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Ramírez J, Brelot L, Osinska I, Stadler AM. CH…O hydrogen bond in the crystal structure of a pyrazine-based ligand and determination of the amplitude of the ligand conformational change induced by Cu(II) coordination. J Mol Struct 2009. [DOI: 10.1016/j.molstruc.2009.05.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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21
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Li FF, Gao X, Zheng M. Why [6,6]- and 1,2-Benzal-3-N-4-O-Cyclic Phenylimidate C60 Undergo Electrochemically Induced Retro-Addition Reactions while 1,4-Dibenzyl-2,3-Cyclic Phenylimidate C60 Does Not? C−H···X (X = N, O) Intramolecular Interactions in Organofullerenes. J Org Chem 2008; 74:82-7. [DOI: 10.1021/jo801769q] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Fang-Fang Li
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, China
| | - Xiang Gao
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, China
| | - Min Zheng
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Graduate School of Chinese Academy of Sciences, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, Jilin 130022, China
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Ali MMN, Aich U, Pérez S, Imberty A, Loganathan D. Examination of the effect of structural variation on the N-glycosidic torsion (PhiN) among N-(beta-D-glycopyranosyl)acetamido and propionamido derivatives of monosaccharides based on crystallography and quantum chemical calculations. Carbohydr Res 2008; 344:355-61. [PMID: 19108819 DOI: 10.1016/j.carres.2008.11.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2008] [Revised: 11/06/2008] [Accepted: 11/06/2008] [Indexed: 11/24/2022]
Abstract
GlcNAcbetaAsn linkage is conserved in the N-glycoproteins of all eukaryotes. l-Glutamine (Gln), which is a one carbon higher homolog of Asn, is never glycosylated. X-ray crystallographic study of several beta-1-N-acetamido- and propionamido derivatives of monosaccharides has earlier shown that the N-glycosidic torsion, Phi(N), is influenced to a larger extent by the structural variation of the sugar part than that of the aglycon moiety. In order to examine the influence of the carbohydrate pendent groups on the conformational preference of the N-glycosidic linkage with respect to Phi(N,) several models and analogs with gluco and manno configuration have been studied in the present work by computational chemistry. The crystal structure of XylbetaNHPr is reported here and its molecular packing compared with related analogs. The conjunction of combining Crystallographic and computational studies allows to demonstrate the strong influence that the group at C2, and environmental factors particularly inter- and intramolecular interactions involving regular hydrogen bonds and the weak C-H...O contacts, have on the energy preference of the Phi(N) torsion angle.
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Ali MMN, Aich U, Varghese B, Imberty A. Conformational Preferences of the Aglycon Moiety in Models and Analogs of GlcNAc-Asn Linkage: Crystal Structures and ab Initio Quantum Chemical Calculations of N-(β-d-Glycopyranosyl)haloacetamides. J Am Chem Soc 2008; 130:8317-25. [DOI: 10.1021/ja800335m] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohamed Mohamed Naseer Ali
- CERMAV-CNRS (affiliated to Université Joseph Fourier and ICMG), BP 53, 38041 Grenoble cedex 9, France, Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Udayanath Aich
- CERMAV-CNRS (affiliated to Université Joseph Fourier and ICMG), BP 53, 38041 Grenoble cedex 9, France, Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Babu Varghese
- CERMAV-CNRS (affiliated to Université Joseph Fourier and ICMG), BP 53, 38041 Grenoble cedex 9, France, Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras, Chennai, 600036, India
| | - Anne Imberty
- CERMAV-CNRS (affiliated to Université Joseph Fourier and ICMG), BP 53, 38041 Grenoble cedex 9, France, Department of Chemistry and Sophisticated Analytical Instrumentation Facility, Indian Institute of Technology Madras, Chennai, 600036, India
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Li Q, An X, Luan F, Li W, Gong B, Cheng J. Regulating Function of Methyl Group in Strength of CH···O Hydrogen Bond: A High-Level Ab Initio Study. J Phys Chem A 2008; 112:3985-90. [DOI: 10.1021/jp800562k] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Qingzhong Li
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
| | - Xiulin An
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
| | - Feng Luan
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
| | - Wenzuo Li
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
| | - Baoan Gong
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
| | - Jianbo Cheng
- Science and Engineering College of Chemistry and Biology, Yantai University, Yantai 264005, China
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25
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Alexacou KM, Hayes JM, Tiraidis C, Zographos SE, Leonidas DD, Chrysina ED, Archontis G, Oikonomakos NG, Paul JV, Varghese B, Loganathan D. Crystallographic and computational studies on 4-phenyl-N-(β-D-glucopyranosyl)-1H-1,2,3-triazole-1-acetamide, an inhibitor of glycogen phosphorylase: Comparison with α-D-glucose, N-acetyl-β-D-glucopyranosylamine and N-benzoyl-N′-β-D-glucopyranosyl urea bin. Proteins 2007; 71:1307-23. [DOI: 10.1002/prot.21837] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Miles JAL, Mitchell L, Percy JM, Singh K, Uneyama E. Total Syntheses of Conformationally Locked Difluorinated Pentopyranose Analogues and a Pentopyranosyl Phosphate Mimetic. J Org Chem 2007; 72:1575-87. [PMID: 17266373 DOI: 10.1021/jo0620258] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Trifluoroethanol has been elaborated, via a telescoped sequence involving a metalated difluoroenol, a difluoroallylic alcohol, [2,3]-Wittig rearrangement, and ultimately an RCM reaction and requiring minimal intermediate purification, to a number of cyclooctenone intermediates. Epoxidation of these intermediates followed by transannular ring opening or dihydroxylation, then transannular hemiacetalization delivers novel bicyclic analogues of pentopyranoses, which were elaborated (in one case) to an analogue of a glycosyl phosphate.
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Affiliation(s)
- Jonathan A L Miles
- Department of Chemistry, University of Leicester, University Road, Leicester LE1 7RH, U.K
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