3AHX

Crystal structure of beta-glucosidase A from bacterium Clostridium cellulovorans


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.146 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural and functional analysis of three beta-glucosidases from bacterium Clostridium cellulovorans, fungus Trichoderma reesei and termite Neotermes koshunensis

Jeng, W.-Y.Wang, N.-C.Lin, M.-H.Lin, C.-T.Liaw, Y.-C.Chang, W.-J.Liu, C.-I.Liang, P.-H.Wang, A.H.-J.

(2011) J.Struct.Biol. 173: 46-56

  • DOI: 10.1016/j.jsb.2010.07.008
  • Primary Citation of Related Structures:  3AHZ, 3AHY, 3AI0

  • PubMed Abstract: 
  • β-glucosidases (EC 3.2.1.21) cleave β-glucosidic linkages in disaccharide or glucose-substituted molecules and play important roles in fundamental biological processes. β-Glucosidases have been widely used in agricultural, biotechnological, industria ...

    β-glucosidases (EC 3.2.1.21) cleave β-glucosidic linkages in disaccharide or glucose-substituted molecules and play important roles in fundamental biological processes. β-Glucosidases have been widely used in agricultural, biotechnological, industrial and medical applications. In this study, a high yield expression (70-250 mg/l) in Escherichia coli of the three functional β-glucosidase genes was obtained from the bacterium Clostridium cellulovorans (CcBglA), the fungus Trichoderma reesei (TrBgl2), and the termite Neotermes koshunensis (NkBgl) with the crystal structures of CcBglA, TrBgl2 and NkBgl, determined at 1.9Å, 1.63Å and 1.34Å resolution, respectively. The overall structures of these enzymes are similar to those belonging to the β-retaining glycosyl hydrolase family 1, which have a classical (α/β)(8)-TIM barrel fold. Each contains a slot-like active site cleft and a more variable outer opening, related to its function in processing different lengths of β-1,4-linked glucose derivatives. The two essential glutamate residues for hydrolysis are spatially conserved in the active site. In both TrBgl2 and NkBgl structures, a Tris molecule was found to bind at the active site, explaining the slight inhibition of hydrolase activity observed in Tris buffer. Manganese ions at 10mM exerted an approximate 2-fold enzyme activity enhancement of all three β-glucosidases, with CcBglA catalyzing the most efficiently in hydrolysis reaction and tolerating Tris as well as some metal inhibition. In summary, our results for the structural and functional properties of these three β-glucosidases from various biological sources open important avenues of exploration for further practical applications.


    Organizational Affiliation

    Institute of Biological Chemistry, Academia Sinica, Taipei 115, Taiwan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Beta-glucosidase A
A, B, C, D
453Clostridium cellulovoransGene Names: bglA
EC: 3.2.1.21
Find proteins for Q53EH2 (Clostridium cellulovorans)
Go to UniProtKB:  Q53EH2
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
7PE
Query on 7PE

Download SDF File 
Download CCD File 
C, D
2-(2-(2-(2-(2-(2-ETHOXYETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHOXY)ETHANOL
POLYETHYLENE GLYCOL FRAGMENT
C14 H30 O7
UKXKPKBTMYNOFS-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.9 Å
  • R-Value Free: 0.198 
  • R-Value Work: 0.146 
  • Space Group: P 41 21 2
Unit Cell:
Length (Å)Angle (°)
a = 128.498α = 90.00
b = 128.498β = 90.00
c = 264.060γ = 90.00
Software Package:
Software NamePurpose
CNSphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling
HKL-2000data collection
CNSrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-08-18
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance