- Exploring the broad nucleotide triphosphate and sugar-1-phosphate specificity of thymidylyltransferase Cps23FL from: Streptococcus pneumonia serotype 23F
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Glucose-1-phosphate thymidylyltransferase (Cps23FL) from Streptococcus pneumonia serotype 23F is the initial enzyme that catalyses the thymidylyl transfer reaction in prokaryotic deoxythymidine diphosphate-l-rhamnose (dTDP-Rha) biosynthetic pathway. In this study, the broad substrate specificity of Cps23FL towards six glucose-1-phosphates and nine nucleoside triphosphates as substrates was systematically explored, eventually providing access to nineteen sugar nucleotide analogs.
- Chen, Zonggang,Gu, Guofeng,Jin, Guoxia,Li, Siqiang,Wang, Hong
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p. 30110 - 30114
(2020/09/07)
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- One-Step Synthesis of Sugar Nucleotides
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The chemical synthesis of sugar nucleotides requires a multistep procedure to ensure a selective reaction. Herein, sugar nucleotides were synthesized in one step using 2-chloro-1,3-dimethylimidazolinium chloride as the condensation reagent. The products were obtained in yields of 12-30%, and the yields were increased to 35-47% by the addition of a tuning reagent. NMR identification of the sugar nucleotides showed that mainly 1,2-trans-glycosides were present. The reported method represents a one-step route to sugar nucleotides from commercially available materials.
- Miyagawa, Atsushi,Toyama, Sanami,Ohmura, Ippei,Miyazaki, Shun,Kamiya, Takeru,Yamamura, Hatsuo
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p. 15645 - 15651
(2020/12/01)
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- Enzymatic Synthesis of Human Milk Fucosides α1,2-Fucosyl para-Lacto-N-Hexaose and its Isomeric Derivatives
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Enzymatic synthesis of para-lacto-N-hexaose and its isomeric structures as well as those α1,2-fucosylated variants naturally occurring in human milk oligosaccharide (HMOs) was achieved using a sequential one-pot enzymatic system. Three glycosylation routes comprising bacterial glycosyltransferases and corresponding sugar-nucleotide-generating enzymes were developed to facilitate efficient production of extended type-1 and type-2 N-acetyllactosamine (LacNAc) backbones and hybrid chains. Further fucosylation efficiency of two α1,2-fucosyltransferases on both type-1 and type-2 chains of the hexasaccharide was investigated to achieve practical synthesis of the fucosylated glycans. The availability of structurally defined HMOs offers a practical approach for investigating future biological applications. (Figure presented.).
- Fang, Jia-Lin,Tsai, Teng-Wei,Liang, Chin-Yu,Li, Jyun-Yi,Yu, Ching-Ching
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supporting information
p. 3213 - 3219
(2018/08/06)
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- Efficient one-pot multienzyme synthesis of UDP-sugars using a promiscuous UDP-sugar pyrophosphorylase from Bifidobacterium longum (BLUSP)
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A promiscuous UDP-sugar pyrophosphorylase (BLUSP) was cloned from Bifidobacterium longum strain ATCC55813 and used efficiently with a Pasteurella multocida inorganic pyrophosphatase (PmPpA) with or without a monosaccharide 1-kinase for one-pot multienzyme synthesis of UDP-galactose, UDP-glucose, UDP-mannose, and their derivatives. Further chemical diversification of a UDP-mannose derivative resulted in the formation of UDP-N-acetylmannosamine. The Royal Society of Chemistry 2012.
- Muthana, Musleh M.,Qu, Jingyao,Li, Yanhong,Zhang, Lei,Yu, Hai,Ding, Li,Malekan, Hamed,Chen, Xi
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supporting information; experimental part
p. 2728 - 2730
(2012/04/17)
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- Leishmania UDP-sugar pyrophosphorylase: The missing link in galactose salvage?
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The Leishmania parasite glycocalyx is rich in galactose-containing glycoconjugates that are synthesized by specific glycosyltransferases that use UDP-galactose as a glycosyl donor. UDP-galactose biosynthesis is thought to be predominantly a de novo process involving epimerization of the abundant nucleotide sugar UDP-glucose by the UDP-glucose 4-epimerase, although galactose salvage from the environment has been demonstrated for Leishmania major. Here, we present the characterization of an L. major UDP-sugar pyrophosphorylase able to reversibly activate galactose 1-phosphate into UDP-galactose thus proving the existence of the Isselbacher salvage pathway in this parasite. The ordered bisubstrate mechanism and high affinity of the enzyme for UTP seem to favor the synthesis of nucleotide sugar rather than their pyrophosphorolysis. Although L. major UDP-sugar pyrophosphorylase preferentially activates galactose 1-phosphate and glucose 1-phosphate, the enzyme is able to act on a variety of hexose 1-phosphates as well as pentose 1-phosphates but not hexosamine 1-phosphates and hence presents a broad in vitro specificity. The newly identified enzyme exhibits a low but significant homology with UDP-glucose pyrophosphorylases and conserved in particular is the pyrophosphorylase consensus sequence and residues involved in nucleotide and phosphate binding. Saturation transfer difference NMR spectroscopy experiments confirm the importance of these moieties for substrate binding. The described leishmanial enzyme is closely related to plant UDP-sugar pyrophosphorylases and presents a similar substrate specificity suggesting their common origin.
- Damerow, Sebastian,Lamerz, Anne-Christin,Haselhorst, Thomas,Fuehring, Jana,Zarnovican, Patricia,von Itsztein, Mark,Routier, Francoise H.
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experimental part
p. 878 - 887
(2010/12/18)
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- Phosphomannose isomerase/GDP-mannose pyrophosphorylase from Pyrococcus furiosus: A thermostable biocatalyst for the synthesis of guanidinediphosphate- activated and mannose-containing sugar nucleotides
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Herein we present an analysis of the chemical function of a recombinant bifunctional phosphomannose isomerase/GDP-mannose pyrophosphorylase (manC) from Pyrococcus furiosus DSM 3638 and its use in the synthesis of guanidinediphospho-hexoses and a range of
- Mizanur, Rahman M.,Pohl, Nicola L. B.
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supporting information; experimental part
p. 2135 - 2139
(2009/09/04)
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- Sugar nucleotide recognition by Klebsiella pneumoniae UDP-d-galactopyranose mutase: Fluorinated substrates, kinetics and equilibria
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A series of selectively fluorinated and other substituted UDP-d-galactose derivatives have been evaluated as substrates for Klebsiella pneumoniae UDP-d-galactopyranose mutase. This enzyme, which catalyses the interconversion of the pyranose and furanose f
- Errey, James C.,Mann, Maretta C.,Fairhurst, Shirley A.,Hill, Lionel,McNeil, Michael R.,Naismith, James H.,Percy, Jonathan M.,Whitfield, Chris,Field, Robert A.
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experimental part
p. 1009 - 1016
(2009/05/30)
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- Stereoselective chemical synthesis of sugar nucleotides via direct displacement of acylated glycosyl bromides
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Figure presented The use of Leloir glycosyltransferases to prepare biologically relevant oligosaccharides and glycoconjugates requires access to sugar nucleoside diphosphates, which are notoriously difficult to efficiently synthesize and purify. We report a novel stereoselective route to UDP- and GDPα-D-mannose as well as UDP- and GDP-β-L-fucose via direct displacement of acylated glycosyl bromides with nucleoside 5′- diphosphates.
- Timmons, Shannon C.,Jakeman, David L.
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p. 1227 - 1230
(2007/10/03)
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- Structure-activity relationship of uridine 5′-diphosphoglucose analogues as agonists of the human P2Y14 receptor
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UDP-glucose (UDPG) and derivatives are naturally occurring agonists of the Gi protein-coupled P2Y14 receptor, which occurs in the immune system. We synthesized and characterized pharmacologically novel analogues of UDPG modified on the nucleobase, ribose, and glucose moieties, as the basis for designing novel ligands in conjunction with modeling. The recombinant human P2Y14 receptor expressed in COS-7 cells was coupled to phospholipase C through an engineered Gα-q/i protein. Most modifications of the uracil or ribose moieties abolished activity; this is among the least permissive P2Y receptors. However, a 2-thiouracil modification in 15 (EC50 49 ± 2 nM) enhanced the potency of UDPG (but not UDP-glucuronic acid) by 7-fold. 4-Thio analogue 13 was equipotent to UDPG, but S-alkylation was detrimental. Compound 15 was docked in a rhodposin-based receptor homology model, which correctly predicted potent agonism of UDP-fructose, UDP-mannose, and UDP-inositol. The hexose moiety of UDPG interacts with multiple H-bonding and charged residues and provides a fertile region for agonist modification.
- Ko, Hyojin,Fricks, Ingrid,Ivanov, Andrei A.,Harden, T. Kendall,Jacobson, Kenneth A.
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p. 2030 - 2039
(2008/02/06)
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- Exploiting nucleotidylyltransferases to prepare sugar nucleotides
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(Graph Presented) Enzymatic approaches to prepare sugar nucleotides are gaining in importance and offer several advantages over chemical synthesis including high yields and stereospecificity. We report the cloning, expression, and purification of two new wild-type thymidylyltransferases and observed catalysis with a wide variety of substrates. Significant product inhibition was not observed with the enzymes studied over a 24 h period, enabling the efficient preparation of 15 sugar nucleotides, clearly demonstrating the synthetic utility of these biocatalysts.
- Timmons, Shannon C.,Mosher, Roy H.,Knowles, Sheryl A.,Jakeman, David L.
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p. 857 - 860
(2007/10/03)
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- One-step synthesis of labeled sugar nucleotides for protein O-GlcNAc modification studies by chemical function analysis of an archaeal protein
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Herein we present the chemical function analysis of a recombinant sugar nucleotidyltransferase from the hyperthermophile Pyrococcus furiosus and its use in the one-pot synthesis of chloroacetyl- and alkyne-tagged analogues of uridinediphospho-N-acetylglucosamine (UDP-GlcNAc). The gene was originally annotated as a glucose-1-phosphate deoxythymidylyltransferase; however, kinetic analysis of a panel of sugar-1-phosphates with the protein shows that it is better described as a bifunctional protein that synthesizes UDP-GlcNAc from glucosamine-1-phosphate and acetyl coenzyme A (CoA). A new mass-spectrometry-based assay for the rapid analysis of the acyltransferase activity demonstrates that the enzyme can also accept cheaper truncated N-acetylcysteamine thioester substrates in place of the natural acetyl CoA. The enzyme can tolerate alkyne or chloride substitutions in the acyl moiety, thereby allowing the facile synthesis of tagged sugar nucleotides for future use in protein O-GlcNAc modification studies. Copyright
- Mizanur, Rahman M.,Jaipuri, Firoz A.,Pohl, Nicola L.
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p. 836 - 837
(2007/10/03)
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- Unusually broad substrate tolerance of a heat-stable archaeal sugar nucleotidyltransferase for the synthesis of sugar nucleotides
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Herein, we report the first cloning, recombinant expression, and synthetic utility of a sugar nucleotidyltransferase from any archaeal source and demonstrate by an electrospray ionization mass spectrometry (ESI-MS)-based assay its unusual tolerance of heat, pH, and sugar substrates. The metalion-dependent enzyme from Pyrococcus furiosus DSM 3638 showed a relatively high degree of acceptance of glucose-1-phosphate (Glc1P), mannose-1-phosphate (Man1P), galactose-1-phosphate (Gal1P), fucose-1-phosphate, glucosamine-1-phosphate, galactosamine-1-phosphate, and N-acetylglucosamine-1-phosphate with uridine and deoxythymidine triphosphate (UTP and dTTP, respectively). The apparent Michaelis constants for Glc1P, Man1P, and Gal1P are 13.0 ± 0.7, 15 ± 1, and 22 ± 2 μM, respectively, with corresponding turnover numbers of 2.08, 1.65, and 1.32 s-1, respectively. An initial velocity study indicated an ordered bi-bi catalytic mechanism for this enzyme. The temperature stability and inherently broad substrate tolerance of this archaeal enzyme promise an effective reagent for the rapid chemoenzymatic synthesis of a range of natural and unnatural sugar nucleotides for in vitro glycosylation studies and highlight the potential of archaea as a source of new enzymes for synthesis.
- Mizanur, Rahman M.,Zea, Corbin J.,Pohl, Nicola L.
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p. 15993 - 15998
(2007/10/03)
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- Active-site engineering of nucleotidylyltransferases and general enzymatic methods for the synthesis of natural and "unnatural" UDP- and TDP-nucleotide sugars
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The present invention provides mutant nucleotidylyl-transferases, such as Ep, having altered substrate specificity; methods for their production; and methods of producing nucleotide sugars, which utilize these nucleotidylyl-transferases. The present invention also provides methods of synthesizing desired nucleotide sugars using natural and/or modified Ep or other nucleotidyltransferases; and nucleotide sugars sythesized by the present methods. The present invention further provides new glycosyl phosphates, and methods for making them.
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- One-step, stereocontrolled synthesis of glycosyl 1-phosphates, uridine- 5'-diphosphogalactose, and uridine-5'-diphosphoglucose from unprotected glycosyl donors
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The reaction of 2-(1,2-trans-glycopyranosyloxy)-3-methoxypyridines (MOP glycosides) with phosphoric acid leads to the corresponding 1,2-cis-1- phosphates in good yield and excellent stereoselectivity. 1-Phosphate esters of α-D-glucopyranose, α-D-galactopyranose, and 2-azido-2-deoxy-α-D- galactopyranose were thus prepared without recourse to protective groups. In the L-fucose series, the major product was the α-L-fucosyl 1-phosphate. An alternative method that relies on neighboring group participation allowed the preparation of a protected β-L-fucosyl 1-phosphate. Reaction of unprotected β-D-glucopyranosyloxy and β-D-galactopyranosyloxy MOP donors with uridine diphosphoric acid gave UDP-Glc and UDP-Gal with preponderance of the desired α-anomeric configuration.
- Hanessian, Stephen,Lu, Pu-Ping,Ishida, Hideki
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p. 13296 - 13300
(2007/10/03)
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