4TVC

N-terminally truncated dextransucrase DSR-E from Leuconostoc mesenteroides NRRL B-1299 in complex with gluco-oligosaccharides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.161 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Structural Insights into the Carbohydrate Binding Ability of an alpha-(12) Branching Sucrase from Glycoside Hydrolase Family 70.

Brison, Y.Malbert, Y.Czaplicki, G.Mourey, L.Remaud-Simeon, M.Tranier, S.

(2016) J.Biol.Chem. 291: 7527-7540

  • DOI: 10.1074/jbc.M115.688796
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The α-(1→2) branching sucrase ΔN123-GBD-CD2 is a transglucosylase belonging to glycoside hydrolase family 70 (GH70) that catalyzes the transfer ofd-glucosyl units from sucroseto dextrans or gluco-oligosaccharides via the formation of α-(1→2) glucosid ...

    The α-(1→2) branching sucrase ΔN123-GBD-CD2 is a transglucosylase belonging to glycoside hydrolase family 70 (GH70) that catalyzes the transfer ofd-glucosyl units from sucroseto dextrans or gluco-oligosaccharides via the formation of α-(1→2) glucosidic linkages. The first structures of ΔN123-GBD-CD2 in complex withd-glucose, isomaltosyl, or isomaltotriosyl residues were solved. The glucose complex revealed three glucose-binding sites in the catalytic gorge and six additional binding sites at the surface of domains B, IV, and V. Soaking with isomaltotriose or gluco-oligosaccharides led to structures in which isomaltosyl or isomaltotriosyl residues were found in glucan binding pockets located in domain V. One aromatic residue is systematically identified at the bottom of these pockets in stacking interaction with one glucosyl moiety. The carbohydrate is also maintained by a network of hydrogen bonds and van der Waals interactions. The sequence of these binding pockets is conserved and repeatedly present in domain V of several GH70 glucansucrases known to bind α-glucans. These findings provide the first structural evidence of the molecular interaction occurring between isomalto-oligosaccharides and domain V of the GH70 enzymes.


    Organizational Affiliation

    the INRA, UMR792 Ingénierie des Systèmes Biologiques et des Procédés, F-31400 Toulouse.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Dextransucrase
A
1108Leuconostoc mesenteroidesMutation(s): 0 
Gene Names: dsrE
EC: 2.4.1.5
Find proteins for Q8G9Q2 (Leuconostoc mesenteroides)
Go to UniProtKB:  Q8G9Q2
Small Molecules
Ligands 4 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NA
Query on NA

Download SDF File 
Download CCD File 
A
SODIUM ION
Na
FKNQFGJONOIPTF-UHFFFAOYSA-N
 Ligand Interaction
GOL
Query on GOL

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Download CCD File 
A
GLYCEROL
GLYCERIN; PROPANE-1,2,3-TRIOL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
 Ligand Interaction
CA
Query on CA

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Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
GLC
Query on GLC

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Download CCD File 
A
ALPHA-D-GLUCOSE
C6 H12 O6
WQZGKKKJIJFFOK-DVKNGEFBSA-N
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
TYI
Query on TYI
A
L-PEPTIDE LINKINGC9 H9 I2 N O3TYR
IYR
Query on IYR
A
L-PEPTIDE LINKINGC9 H10 I N O3TYR
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.85 Å
  • R-Value Free: 0.205 
  • R-Value Work: 0.161 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 68.310α = 90.00
b = 100.140β = 90.00
c = 186.240γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
SCALAdata scaling
PHASERphasing
iMOSFLMdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-07-29
    Type: Initial release
  • Version 1.1: 2016-02-24
    Type: Database references
  • Version 1.2: 2016-04-13
    Type: Database references