Glycoside Hydrolase Family 39 β-Xylosidases Exhibit β-1,2-Xylosidase Activity for Transformation of Notoginsenosides: A New EC Subsubclass

2019 ◽  
Vol 67 (11) ◽  
pp. 3220-3228 ◽  
Author(s):  
Rui Zhang ◽  
Na Li ◽  
Shujing Xu ◽  
Xiaowei Han ◽  
Chunyan Li ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Glycoside Hydrolase Family ◽  
Hydrolase Family ◽  
Xylosidase Activity

Xylanases of glycoside hydrolase family 30 – An overview

2021 ◽  
Vol 47 ◽  
pp. 107704
Author(s):  
Vladimír Puchart ◽  
Katarína Šuchová ◽  
Peter Biely
Keyword(s):  
Glycoside Hydrolase ◽  
Glycoside Hydrolase Family ◽  
Hydrolase Family ◽  
Glycoside Hydrolase Family 30

scholarly journals Modeled 3D-Structures of Proteobacterial Transglycosylases from Glycoside Hydrolase Family 17 Give Insight in Ligand Interactions Explaining Differences in Transglycosylation Products

2021 ◽  
Vol 11 (9) ◽  
pp. 4048
Author(s):  
Javier A. Linares-Pastén ◽  
Lilja Björk Jonsdottir ◽  
Gudmundur O. Hreggvidsson ◽  
Olafur H. Fridjonsson ◽  
Hildegard Watzlawick ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Ligand Docking ◽  
Glycoside Hydrolase Family ◽  
Ligand Interactions ◽  
Tim Barrel ◽  
Branching Point ◽  
The Difference ◽  
Dynamics Simulations ◽  
And Function ◽  
Hydrolase Family

The structures of glycoside hydrolase family 17 (GH17) catalytic modules from modular proteins in the ndvB loci in Pseudomonas aeruginosa (Glt1), P. putida (Glt3) and Bradyrhizobium diazoefficiens (previously B. japonicum) (Glt20) were modeled to shed light on reported differences between these homologous transglycosylases concerning substrate size, preferred cleavage site (from reducing end (Glt20: DP2 product) or non-reducing end (Glt1, Glt3: DP4 products)), branching (Glt20) and linkage formed (1,3-linkage in Glt1, Glt3 and 1,6-linkage in Glt20). Hybrid models were built and stability of the resulting TIM-barrel structures was supported by molecular dynamics simulations. Catalytic amino acids were identified by superimposition of GH17 structures, and function was verified by mutagenesis using Glt20 as template (i.e., E120 and E209). Ligand docking revealed six putative subsites (−4, −3, −2, −1, +1 and +2), and the conserved interacting residues suggest substrate binding in the same orientation in all three transglycosylases, despite release of the donor oligosaccharide product from either the reducing (Glt20) or non-reducing end (Glt1, Gl3). Subsites +1 and +2 are most conserved and the difference in release is likely due to changes in loop structures, leading to loss of hydrogen bonds in Glt20. Substrate docking in Glt20 indicate that presence of covalently bound donor in glycone subsites −4 to −1 creates space to accommodate acceptor oligosaccharide in alternative subsites in the catalytic cleft, promoting a branching point and formation of a 1,6-linkage. The minimum donor size of DP5, can be explained assuming preferred binding of DP4 substrates in subsite −4 to −1, preventing catalysis.

scholarly journals Understanding the Polymerization Mechanism of Glycoside-Hydrolase Family 70 Glucansucrases

2006 ◽  
Vol 281 (42) ◽  
pp. 31254-31267
Author(s):  
Claire Moulis ◽  
Gilles Joucla ◽  
David Harrison ◽  
Emeline Fabre ◽  
Gabrielle Potocki-Veronese ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Glycoside Hydrolase Family ◽  
Polymerization Mechanism ◽  
Hydrolase Family

scholarly journals Endo-fucoidan hydrolases from glycoside hydrolase family 107 (GH107) display structural and mechanistic similarities to α-l-fucosidases from GH29

2018 ◽  
Vol 293 (47) ◽  
pp. 18296-18308 ◽  
Author(s):  
Chelsea Vickers ◽  
Feng Liu ◽  
Kento Abe ◽  
Orly Salama-Alber ◽  
Meredith Jenkins ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Biological Activities ◽  
Bacterial Species ◽  
Structural Data ◽  
Side Chain ◽  
Glycoside Hydrolase Family ◽  
X Ray Crystallography ◽  
Catalytic Mechanisms ◽  
Thickening Agents ◽  
Hydrolase Family

Fucoidans are chemically complex and highly heterogeneous sulfated marine fucans from brown macro algae. Possessing a variety of physicochemical and biological activities, fucoidans are used as gelling and thickening agents in the food industry and have anticoagulant, antiviral, antitumor, antibacterial, and immune activities. Although fucoidan-depolymerizing enzymes have been identified, the molecular basis of their activity on these chemically complex polysaccharides remains largely uninvestigated. In this study, we focused on three glycoside hydrolase family 107 (GH107) enzymes: MfFcnA and two newly identified members, P5AFcnA and P19DFcnA, from a bacterial species of the genus Psychromonas. Using carbohydrate-PAGE, we show that P5AFcnA and P19DFcnA are active on fucoidans that differ from those depolymerized by MfFcnA, revealing differential substrate specificity within the GH107 family. Using a combination of X-ray crystallography and NMR analyses, we further show that GH107 family enzymes share features of their structures and catalytic mechanisms with GH29 α-l-fucosidases. However, we found that GH107 enzymes have the distinction of utilizing a histidine side chain as the proposed acid/base catalyst in its retaining mechanism. Further interpretation of the structural data indicated that the active-site architectures within this family are highly variable, likely reflecting the specificity of GH107 enzymes for different fucoidan substructures. Together, these findings begin to illuminate the molecular details underpinning the biological processing of fucoidans.

scholarly journals Structure of a bacterial glycoside hydrolase family 63 enzyme in complex with its glycosynthase product, and insights into the substrate specificity

FEBS Journal ◽  
2013 ◽  
Vol 280 (18) ◽  
pp. 4560-4571 ◽  
Author(s):  
Takatsugu Miyazaki ◽  
Megumi Ichikawa ◽  
Gaku Yokoi ◽  
Motomitsu Kitaoka ◽  
Haruhide Mori ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Glycoside Hydrolase ◽  
Glycoside Hydrolase Family ◽  
Hydrolase Family

scholarly journals Substrate Specificity in Glycoside Hydrolase Family 10

2000 ◽  
Vol 275 (30) ◽  
pp. 23020-23026 ◽  
Author(s):  
Valérie Ducros ◽  
Simon J. Charnock ◽  
Urszula Derewenda ◽  
Zygmunt S. Derewenda ◽  
Zbigniew Dauter ◽  
...  
Keyword(s):  
Substrate Specificity ◽  
Glycoside Hydrolase ◽  
Glycoside Hydrolase Family ◽  
Glycoside Hydrolase Family 10 ◽  
Hydrolase Family

The α-glucuronidase Agu1 from Schizophyllum commune is a member of a novel glycoside hydrolase family (GH115)

2011 ◽  
Vol 90 (4) ◽  
pp. 1323-1332 ◽  
Author(s):  
Sun-Li Chong ◽  
Evy Battaglia ◽  
Pedro M. Coutinho ◽  
Bernard Henrissat ◽  
Maija Tenkanen ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Schizophyllum Commune ◽  
Glycoside Hydrolase Family ◽  
Hydrolase Family

scholarly journals A Novel Glycoside Hydrolase Family 5 β-1,3-1,6-Endoglucanase from Saccharophagus degradans 2-40Tand Its Transglycosylase Activity

2016 ◽  
Vol 82 (14) ◽  
pp. 4340-4349 ◽  
Author(s):  
Damao Wang ◽  
Do Hyoung Kim ◽  
Nari Seo ◽  
Eun Ju Yun ◽  
Hyun Joo An ◽  
...  
Keyword(s):  
Glycoside Hydrolase ◽  
Marine Bacterium ◽  
Enzymatic Reaction ◽  
Glycoside Hydrolase Family ◽  
Reaction Products ◽  
Brown Macroalgae ◽  
Fungal Cell ◽  
Content Type ◽  
Saccharophagus Degradans ◽  
Hydrolase Family

ABSTRACTIn this study, we characterized Gly5M, originating from a marine bacterium, as a novel β-1,3-1,6-endoglucanase in glycoside hydrolase family 5 (GH5) in the Carbohydrate-Active enZyme database. Thegly5Mgene encodes Gly5M, a newly characterized enzyme from GH5 subfamily 47 (GH5_47) inSaccharophagus degradans2-40T. Thegly5Mgene was cloned and overexpressed inEscherichia coli. Through analysis of the enzymatic reaction products by thin-layer chromatography, high-performance liquid chromatography, and matrix-assisted laser desorption ionization–tandem time of flight mass spectrometry, Gly5M was identified as a novel β-1,3-endoglucanase (EC 3.2.1.39) and bacterial β-1,6-glucanase (EC 3.2.1.75) in GH5. The β-1,3-endoglucanase and β-1,6-endoglucanase activities were detected by using laminarin (a β-1,3-glucan with β-1,6-glycosidic linkages derived from brown macroalgae) and pustulan (a β-1,6-glucan derived from fungal cell walls) as the substrates, respectively. This enzyme also showed transglycosylase activity toward β-1,3-oligosaccharides when laminarioligosaccharides were used as the substrates. Since laminarin is the major form of glucan storage in brown macroalgae, Gly5M could be used to produce glucose and laminarioligosaccharides, using brown macroalgae, for industrial purposes.IMPORTANCEIn this study, we have discovered a novel β-1,3-1,6-endoglucanase with a unique transglycosylase activity, namely, Gly5M, from a marine bacterium,Saccharophagus degradans2-40T. Gly5M was identified as the newly found β-1,3-endoglucanase and bacterial β-1,6-glucanase in GH5. Gly5M is capable of cleaving glycosidic linkages of both β-1,3-glucans and β-1,6-glucans. Gly5M also possesses a transglycosylase activity toward β-1,3-oligosacchrides. Due to the broad specificity of Gly5M, this enzyme can be used to produce glucose or high-value β-1,3- and/or β-1,6-oligosaccharides.

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