5JVV

Crystal structure and characterization an elongating GH family 16 beta-1,3-glucosyltransferase


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.589 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.149 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Catalytic Mechanism of a Novel Glycoside Hydrolase Family 16 "Elongating" beta-Transglycosylase

Qin, Z.Yang, S.Zhao, L.You, X.Yan, Q.Jiang, Z.

(2017) J. Biol. Chem. 292: 1666-1678

  • DOI: 10.1074/jbc.M116.762419

  • PubMed Abstract: 
  • Carbohydrates are complex macromolecules in biological metabolism. Enzymatic synthesis of carbohydrates is recognized as a powerful tool to overcome the problems associated with large scale synthesis of carbohydrates. Novel enzymes with significant t ...

    Carbohydrates are complex macromolecules in biological metabolism. Enzymatic synthesis of carbohydrates is recognized as a powerful tool to overcome the problems associated with large scale synthesis of carbohydrates. Novel enzymes with significant transglycosylation ability are still in great demand in glycobiology studies. Here we report a novel glycoside hydrolase family 16 "elongating" β-transglycosylase from Paecilomyces thermophila (PtBgt16A), which efficiently catalyzes the synthesis of higher polymeric oligosaccharides using β-1,3/1,4-oligosaccharides as donor/acceptor substrates. Further structural information reveals that PtBgt16A has a binding pocket around the -1 subsite. The catalytic mechanism of PtBgt16A is partly similar to an exo-glycoside hydrolase, which cleaves the substrate from the non-reducing end one by one. However, PtBgt16A releases the reducing end product and uses the remainder glucosyl as a transglycosylation donor. This catalytic mechanism has similarity with the catalytic mode of amylosucrase, which catalyzes the transglycosylation products gradually extend by one glucose unit. PtBgt16A thus has the potential to be a tool enzyme for the enzymatic synthesis of new β-oligosaccharides and glycoconjugates.


    Organizational Affiliation

    From the Beijing Advanced Innovation Center for Food Nutrition and Human Health, College of Food Science and Nutritional Engineering and.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
beta-1,3-glucosyltransferase
B, A
298N/AMutation(s): 0 
Protein Feature View is not available: No corresponding UniProt sequence found.
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.589 Å
  • R-Value Free: 0.179 
  • R-Value Work: 0.149 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 45.282α = 90.00
b = 91.469β = 93.80
c = 59.532γ = 90.00
Software Package:
Software NamePurpose
PHENIXphasing
PHENIXmodel building
HKL-3000data scaling
HKL-3000data reduction
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-12-14
    Type: Initial release
  • Version 1.1: 2017-02-01
    Type: Database references
  • Version 1.2: 2017-02-15
    Type: Database references
  • Version 1.3: 2017-10-04
    Type: Data collection